// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2004-2006 Novell, Inc. (http://www.novell.com)
//
// Authors:
// Peter Bartok pbartok@novell.com
//
//
// NOT COMPLETE
// There's still plenty of things missing, I've got most of it planned, just hadn't had
// the time to write it all yet.
// Stuff missing (in no particular order):
// - Align text after RecalculateLine
// - Implement tag types for hotlinks, etc.
// - Implement CaretPgUp/PgDown
// NOTE:
// selection_start.pos and selection_end.pos are 0-based
// selection_start.pos = first selected char
// selection_end.pos = first NOT-selected char
//
// FormatText methods are 1-based (as are all tags, LineTag.Start is 1 for
// the first character on a line; the reason is that 0 is the position
// *before* the first character on a line
#undef Debug
using System;
using System.Collections;
using System.Drawing;
using System.Drawing.Text;
using System.Text;
namespace System.Windows.Forms {
internal enum LineColor {
Red = 0,
Black = 1
}
internal enum CaretSelection {
Position, // Selection=Caret
Word, // Selection=Word under caret
Line // Selection=Line under caret
}
internal class FontDefinition {
internal String face;
internal int size;
internal FontStyle add_style;
internal FontStyle remove_style;
internal Color color;
internal Font font_obj;
}
[Flags]
internal enum FormatSpecified {
None,
BackColor = 2,
Font = 4,
Color = 8,
}
internal enum CaretDirection {
CharForward, // Move a char to the right
CharBack, // Move a char to the left
LineUp, // Move a line up
LineDown, // Move a line down
Home, // Move to the beginning of the line
End, // Move to the end of the line
PgUp, // Move one page up
PgDn, // Move one page down
CtrlPgUp, // Move caret to the first visible char in the viewport
CtrlPgDn, // Move caret to the last visible char in the viewport
CtrlHome, // Move to the beginning of the document
CtrlEnd, // Move to the end of the document
WordBack, // Move to the beginning of the previous word (or beginning of line)
WordForward, // Move to the beginning of the next word (or end of line)
SelectionStart, // Move to the beginning of the current selection
SelectionEnd, // Move to the end of the current selection
CharForwardNoWrap, // Move a char forward, but don't wrap onto the next line
CharBackNoWrap // Move a char backward, but don't wrap onto the previous line
}
// Being cloneable should allow for nice line and document copies...
internal class Line : ICloneable, IComparable {
#region Local Variables
internal Document document;
// Stuff that matters for our line
internal StringBuilder text; // Characters for the line
internal float[] widths; // Width of each character; always one larger than text.Length
internal int space; // Number of elements in text and widths
internal int line_no; // Line number
internal LineTag tags; // Tags describing the text
internal int offset; // Baseline can be on the X or Y axis depending if we are in multiline mode or not
internal int height; // Height of the line (height of tallest tag)
internal int ascent; // Ascent of the line (ascent of the tallest tag)
internal HorizontalAlignment alignment; // Alignment of the line
internal int align_shift; // Pixel shift caused by the alignment
internal bool soft_break; // Tag is 'broken soft' and continuation from previous line
internal int indent; // Left indent for the first line
internal int hanging_indent; // Hanging indent (left indent for all but the first line)
internal int right_indent; // Right indent for all lines
internal bool carriage_return;
// Stuff that's important for the tree
internal Line parent; // Our parent line
internal Line left; // Line with smaller line number
internal Line right; // Line with higher line number
internal LineColor color; // We're doing a black/red tree. this is the node color
internal int DEFAULT_TEXT_LEN; //
internal bool recalc; // Line changed
#endregion // Local Variables
#region Constructors
internal Line (Document document)
{
this.document = document;
color = LineColor.Red;
left = null;
right = null;
parent = null;
text = null;
recalc = true;
soft_break = false;
alignment = HorizontalAlignment.Left;
}
internal Line(Document document, int LineNo, string Text, Font font, SolidBrush color) : this (document) {
space = Text.Length > DEFAULT_TEXT_LEN ? Text.Length+1 : DEFAULT_TEXT_LEN;
text = new StringBuilder(Text, space);
line_no = LineNo;
widths = new float[space + 1];
tags = new LineTag(this, 1);
tags.font = font;
tags.color = color;
}
internal Line(Document document, int LineNo, string Text, HorizontalAlignment align, Font font, SolidBrush color) : this(document) {
space = Text.Length > DEFAULT_TEXT_LEN ? Text.Length+1 : DEFAULT_TEXT_LEN;
text = new StringBuilder(Text, space);
line_no = LineNo;
alignment = align;
widths = new float[space + 1];
tags = new LineTag(this, 1);
tags.font = font;
tags.color = color;
}
internal Line(Document document, int LineNo, string Text, LineTag tag) : this(document) {
space = Text.Length > DEFAULT_TEXT_LEN ? Text.Length+1 : DEFAULT_TEXT_LEN;
text = new StringBuilder(Text, space);
line_no = LineNo;
widths = new float[space + 1];
tags = tag;
}
#endregion // Constructors
#region Internal Properties
internal int Y {
get {
if (!document.multiline)
return 0;
return offset;
}
}
internal int X {
get {
if (document.multiline)
return align_shift;
return offset;
}
}
internal int Width {
get {
int res = (int) widths [text.Length];
if (!document.multiline) {
}
return res;
}
}
internal int Indent {
get {
return indent;
}
set {
indent = value;
recalc = true;
}
}
internal int HangingIndent {
get {
return hanging_indent;
}
set {
hanging_indent = value;
recalc = true;
}
}
internal int RightIndent {
get {
return right_indent;
}
set {
right_indent = value;
recalc = true;
}
}
internal int Height {
get {
return height;
}
set {
height = value;
}
}
internal int LineNo {
get {
return line_no;
}
set {
line_no = value;
}
}
internal string Text {
get {
return text.ToString();
}
set {
text = new StringBuilder(value, value.Length > DEFAULT_TEXT_LEN ? value.Length : DEFAULT_TEXT_LEN);
}
}
internal HorizontalAlignment Alignment {
get {
return alignment;
}
set {
if (alignment != value) {
alignment = value;
recalc = true;
}
}
}
#if no
internal StringBuilder Text {
get {
return text;
}
set {
text = value;
}
}
#endif
#endregion // Internal Properties
#region Internal Methods
// Make sure we always have enoughs space in text and widths
internal void Grow(int minimum) {
int length;
float[] new_widths;
length = text.Length;
if ((length + minimum) > space) {
// We need to grow; double the size
if ((length + minimum) > (space * 2)) {
new_widths = new float[length + minimum * 2 + 1];
space = length + minimum * 2;
} else {
new_widths = new float[space * 2 + 1];
space *= 2;
}
widths.CopyTo(new_widths, 0);
widths = new_widths;
}
}
internal void Streamline(int lines) {
LineTag current;
LineTag next;
current = this.tags;
next = current.next;
// Catch what the loop below wont; eliminate 0 length
// tags, but only if there are other tags after us
while ((current.length == 0) && (next != null)) {
tags = next;
tags.previous = null;
current = next;
next = current.next;
}
if (next == null) {
return;
}
while (next != null) {
// Take out 0 length tags unless it's the last tag in the document
if (next.length == 0) {
if ((next.next != null) || (line_no != lines)) {
current.next = next.next;
if (current.next != null) {
current.next.previous = current;
}
next = current.next;
continue;
}
}
if (current.Combine(next)) {
next = current.next;
continue;
}
current = current.next;
next = current.next;
}
}
/// Find the tag on a line based on the character position, pos is 0-based
internal LineTag FindTag(int pos) {
LineTag tag;
if (pos == 0) {
return tags;
}
tag = this.tags;
if (pos >= text.Length) {
pos = text.Length - 1;
}
while (tag != null) {
if (((tag.start - 1) <= pos) && (pos < (tag.start + tag.length - 1))) {
return LineTag.GetFinalTag (tag);
}
tag = tag.next;
}
return null;
}
///
/// Recalculate a single line using the same char for every character in the line
///
internal bool RecalculatePasswordLine(Graphics g, Document doc) {
LineTag tag;
int pos;
int len;
float w;
bool ret;
int descent;
pos = 0;
len = this.text.Length;
tag = this.tags;
ascent = 0;
tag.shift = 0;
this.recalc = false;
widths[0] = indent;
w = g.MeasureString(doc.password_char, tags.font, 10000, Document.string_format).Width;
if (this.height != (int)tag.font.Height) {
ret = true;
} else {
ret = false;
}
this.height = (int)tag.font.Height;
tag.height = this.height;
XplatUI.GetFontMetrics(g, tag.font, out tag.ascent, out descent);
this.ascent = tag.ascent;
while (pos < len) {
pos++;
widths[pos] = widths[pos-1] + w;
}
return ret;
}
///
/// Go through all tags on a line and recalculate all size-related values;
/// returns true if lineheight changed
///
internal bool RecalculateLine(Graphics g, Document doc) {
LineTag tag;
int pos;
int len;
SizeF size;
float w;
int prev_height;
bool retval;
bool wrapped;
Line line;
int wrap_pos;
pos = 0;
len = this.text.Length;
tag = this.tags;
prev_height = this.height; // For drawing optimization calculations
this.height = 0; // Reset line height
this.ascent = 0; // Reset the ascent for the line
tag.shift = 0;
if (this.soft_break) {
widths[0] = hanging_indent;
} else {
widths[0] = indent;
}
this.recalc = false;
retval = false;
wrapped = false;
wrap_pos = 0;
while (pos < len) {
while (tag.length == 0) { // We should always have tags after a tag.length==0 unless len==0
tag.ascent = 0;
tag = tag.next;
tag.shift = 0;
}
size = tag.SizeOfPosition (g, pos);
w = size.Width;
if (Char.IsWhiteSpace(text[pos])) {
wrap_pos = pos + 1;
}
if (doc.wrap) {
if ((wrap_pos > 0) && (wrap_pos != len) && (widths[pos] + w) + 5 > (doc.viewport_width - this.right_indent)) {
// Make sure to set the last width of the line before wrapping
widths [pos + 1] = widths [pos] + w;
pos = wrap_pos;
len = text.Length;
doc.Split(this, tag, pos, this.soft_break);
this.soft_break = true;
len = this.text.Length;
retval = true;
wrapped = true;
} else if (pos > 1 && (widths[pos] + w) > (doc.viewport_width - this.right_indent)) {
// No suitable wrap position was found so break right in the middle of a word
// Make sure to set the last width of the line before wrapping
widths [pos + 1] = widths [pos] + w;
doc.Split(this, tag, pos, this.soft_break);
this.soft_break = true;
len = this.text.Length;
retval = true;
wrapped = true;
}
}
// Contract all soft lines that follow back into our line
if (!wrapped) {
pos++;
widths[pos] = widths[pos-1] + w;
if (pos == len) {
line = doc.GetLine(this.line_no + 1);
if ((line != null) && soft_break) {
// Pull the two lines together
doc.Combine(this.line_no, this.line_no + 1);
len = this.text.Length;
retval = true;
}
}
}
if (pos == (tag.start-1 + tag.length)) {
// We just found the end of our current tag
tag.height = tag.MaxHeight ();
// Check if we're the tallest on the line (so far)
if (tag.height > this.height) {
this.height = tag.height; // Yep; make sure the line knows
}
if (tag.ascent == 0) {
int descent;
XplatUI.GetFontMetrics(g, tag.font, out tag.ascent, out descent);
}
if (tag.ascent > this.ascent) {
LineTag t;
// We have a tag that has a taller ascent than the line;
t = tags;
while (t != null && t != tag) {
t.shift = tag.ascent - t.ascent;
t = t.next;
}
// Save on our line
this.ascent = tag.ascent;
} else {
tag.shift = this.ascent - tag.ascent;
}
tag = tag.next;
if (tag != null) {
tag.shift = 0;
wrap_pos = pos;
}
}
}
if (this.height == 0) {
this.height = tags.font.Height;
tag.height = this.height;
}
if (prev_height != this.height) {
retval = true;
}
return retval;
}
#endregion // Internal Methods
#region Administrative
public int CompareTo(object obj) {
if (obj == null) {
return 1;
}
if (! (obj is Line)) {
throw new ArgumentException("Object is not of type Line", "obj");
}
if (line_no < ((Line)obj).line_no) {
return -1;
} else if (line_no > ((Line)obj).line_no) {
return 1;
} else {
return 0;
}
}
public object Clone() {
Line clone;
clone = new Line (document);
clone.text = text;
if (left != null) {
clone.left = (Line)left.Clone();
}
if (left != null) {
clone.left = (Line)left.Clone();
}
return clone;
}
internal object CloneLine() {
Line clone;
clone = new Line (document);
clone.text = text;
return clone;
}
public override bool Equals(object obj) {
if (obj == null) {
return false;
}
if (!(obj is Line)) {
return false;
}
if (obj == this) {
return true;
}
if (line_no == ((Line)obj).line_no) {
return true;
}
return false;
}
public override int GetHashCode() {
return base.GetHashCode ();
}
public override string ToString() {
return "Line " + line_no;
}
#endregion // Administrative
}
internal class Document : ICloneable, IEnumerable {
#region Structures
// FIXME - go through code and check for places where
// we do explicit comparisons instead of using the compare overloads
internal struct Marker {
internal Line line;
internal LineTag tag;
internal int pos;
internal int height;
public static bool operator<(Marker lhs, Marker rhs) {
if (lhs.line.line_no < rhs.line.line_no) {
return true;
}
if (lhs.line.line_no == rhs.line.line_no) {
if (lhs.pos < rhs.pos) {
return true;
}
}
return false;
}
public static bool operator>(Marker lhs, Marker rhs) {
if (lhs.line.line_no > rhs.line.line_no) {
return true;
}
if (lhs.line.line_no == rhs.line.line_no) {
if (lhs.pos > rhs.pos) {
return true;
}
}
return false;
}
public static bool operator==(Marker lhs, Marker rhs) {
if ((lhs.line.line_no == rhs.line.line_no) && (lhs.pos == rhs.pos)) {
return true;
}
return false;
}
public static bool operator!=(Marker lhs, Marker rhs) {
if ((lhs.line.line_no != rhs.line.line_no) || (lhs.pos != rhs.pos)) {
return true;
}
return false;
}
public void Combine(Line move_to_line, int move_to_line_length) {
line = move_to_line;
pos += move_to_line_length;
tag = LineTag.FindTag(line, pos);
}
// This is for future use, right now Document.Split does it by hand, with some added shortcut logic
public void Split(Line move_to_line, int split_at) {
line = move_to_line;
pos -= split_at;
tag = LineTag.FindTag(line, pos);
}
public override bool Equals(object obj) {
return this==(Marker)obj;
}
public override int GetHashCode() {
return base.GetHashCode ();
}
public override string ToString() {
return "Marker Line " + line + ", Position " + pos;
}
}
#endregion Structures
#region Local Variables
private Line document;
private int lines;
private Line sentinel;
private int document_id;
private Random random = new Random();
internal string password_char;
private StringBuilder password_cache;
private bool calc_pass;
private int char_count;
// For calculating widths/heights
public static readonly StringFormat string_format = new StringFormat (StringFormat.GenericTypographic);
private int recalc_suspended;
private bool recalc_pending;
private int recalc_start = 1; // This starts at one, since lines are 1 based
private int recalc_end;
private bool recalc_optimize;
private int update_suspended;
private bool update_pending;
private int update_start = 1;
internal bool multiline;
internal bool wrap;
internal UndoManager undo;
internal Marker caret;
internal Marker selection_start;
internal Marker selection_end;
internal bool selection_visible;
internal Marker selection_anchor;
internal Marker selection_prev;
internal bool selection_end_anchor;
internal int viewport_x;
internal int viewport_y; // The visible area of the document
internal int viewport_width;
internal int viewport_height;
internal int document_x; // Width of the document
internal int document_y; // Height of the document
internal Rectangle invalid;
internal int crlf_size; // 1 or 2, depending on whether we use \r\n or just \n
internal TextBoxBase owner; // Who's owning us?
static internal int caret_width = 1;
static internal int caret_shift = 1;
#endregion // Local Variables
#region Constructors
internal Document(TextBoxBase owner) {
lines = 0;
this.owner = owner;
multiline = true;
password_char = "";
calc_pass = false;
recalc_pending = false;
// Tree related stuff
sentinel = new Line (this);
sentinel.color = LineColor.Black;
document = sentinel;
// We always have a blank line
owner.HandleCreated += new EventHandler(owner_HandleCreated);
owner.VisibleChanged += new EventHandler(owner_VisibleChanged);
Add(1, "", owner.Font, ThemeEngine.Current.ResPool.GetSolidBrush(owner.ForeColor));
Line l = GetLine (1);
l.soft_break = true;
undo = new UndoManager (this);
selection_visible = false;
selection_start.line = this.document;
selection_start.pos = 0;
selection_start.tag = selection_start.line.tags;
selection_end.line = this.document;
selection_end.pos = 0;
selection_end.tag = selection_end.line.tags;
selection_anchor.line = this.document;
selection_anchor.pos = 0;
selection_anchor.tag = selection_anchor.line.tags;
caret.line = this.document;
caret.pos = 0;
caret.tag = caret.line.tags;
viewport_x = 0;
viewport_y = 0;
crlf_size = 2;
// Default selection is empty
document_id = random.Next();
string_format.Trimming = StringTrimming.None;
string_format.FormatFlags = StringFormatFlags.MeasureTrailingSpaces;
}
#endregion
#region Internal Properties
internal Line Root {
get {
return document;
}
set {
document = value;
}
}
internal int Lines {
get {
return lines;
}
}
internal Line CaretLine {
get {
return caret.line;
}
}
internal int CaretPosition {
get {
return caret.pos;
}
}
internal Point Caret {
get {
return new Point((int)caret.tag.line.widths[caret.pos] + caret.line.X, caret.line.Y);
}
}
internal LineTag CaretTag {
get {
return caret.tag;
}
set {
caret.tag = value;
}
}
internal int CRLFSize {
get {
return crlf_size;
}
set {
crlf_size = value;
}
}
internal string PasswordChar {
get {
return password_char;
}
set {
password_char = value;
PasswordCache.Length = 0;
if ((password_char.Length != 0) && (password_char[0] != '\0')) {
calc_pass = true;
} else {
calc_pass = false;
}
}
}
private StringBuilder PasswordCache {
get {
if (password_cache == null)
password_cache = new StringBuilder();
return password_cache;
}
}
internal int ViewPortX {
get {
return viewport_x;
}
set {
viewport_x = value;
}
}
internal int Length {
get {
return char_count + lines - 1; // Add \n for each line but the last
}
}
private int CharCount {
get {
return char_count;
}
set {
char_count = value;
if (LengthChanged != null) {
LengthChanged(this, EventArgs.Empty);
}
}
}
internal int ViewPortY {
get {
return viewport_y;
}
set {
viewport_y = value;
}
}
internal int ViewPortWidth {
get {
return viewport_width;
}
set {
viewport_width = value;
}
}
internal int ViewPortHeight {
get {
return viewport_height;
}
set {
viewport_height = value;
}
}
internal int Width {
get {
return this.document_x;
}
}
internal int Height {
get {
return this.document_y;
}
}
internal bool SelectionVisible {
get {
return selection_visible;
}
}
internal bool Wrap {
get {
return wrap;
}
set {
wrap = value;
}
}
#endregion // Internal Properties
#region Private Methods
internal void SuspendRecalc ()
{
recalc_suspended++;
}
internal void ResumeRecalc (bool immediate_update)
{
if (recalc_suspended > 0)
recalc_suspended--;
if (immediate_update && recalc_suspended == 0 && recalc_pending) {
RecalculateDocument (owner.CreateGraphicsInternal(), recalc_start, recalc_end, recalc_optimize);
recalc_pending = false;
}
}
internal void SuspendUpdate ()
{
update_suspended++;
}
internal void ResumeUpdate (bool immediate_update)
{
if (update_suspended > 0)
update_suspended--;
if (immediate_update && update_suspended == 0 && update_pending) {
UpdateView (GetLine (update_start), 0);
update_pending = false;
}
}
// For debugging
internal int DumpTree(Line line, bool with_tags) {
int total;
total = 1;
Console.Write("Line {0} [# {1}], Y: {2}, soft: {3}, Text: '{4}'",
line.line_no, line.GetHashCode(), line.Y, line.soft_break,
line.text != null ? line.text.ToString() : "undefined");
if (line.left == sentinel) {
Console.Write(", left = sentinel");
} else if (line.left == null) {
Console.Write(", left = NULL");
}
if (line.right == sentinel) {
Console.Write(", right = sentinel");
} else if (line.right == null) {
Console.Write(", right = NULL");
}
Console.WriteLine("");
if (with_tags) {
LineTag tag;
int count;
int length;
tag = line.tags;
count = 1;
length = 0;
Console.Write(" Tags: ");
while (tag != null) {
Console.Write("{0} <{1}>-<{2}>", count++, tag.start, tag.end
/*line.text.ToString (tag.start - 1, tag.length)*/);
length += tag.length;
if (tag.line != line) {
Console.Write("BAD line link");
throw new Exception("Bad line link in tree");
}
tag = tag.next;
if (tag != null) {
Console.Write(", ");
}
}
if (length > line.text.Length) {
throw new Exception(String.Format("Length of tags more than length of text on line (expected {0} calculated {1})", line.text.Length, length));
} else if (length < line.text.Length) {
throw new Exception(String.Format("Length of tags less than length of text on line (expected {0} calculated {1})", line.text.Length, length));
}
Console.WriteLine("");
}
if (line.left != null) {
if (line.left != sentinel) {
total += DumpTree(line.left, with_tags);
}
} else {
if (line != sentinel) {
throw new Exception("Left should not be NULL");
}
}
if (line.right != null) {
if (line.right != sentinel) {
total += DumpTree(line.right, with_tags);
}
} else {
if (line != sentinel) {
throw new Exception("Right should not be NULL");
}
}
for (int i = 1; i <= this.lines; i++) {
if (GetLine(i) == null) {
throw new Exception(String.Format("Hole in line order, missing {0}", i));
}
}
if (line == this.Root) {
if (total < this.lines) {
throw new Exception(String.Format("Not enough nodes in tree, found {0}, expected {1}", total, this.lines));
} else if (total > this.lines) {
throw new Exception(String.Format("Too many nodes in tree, found {0}, expected {1}", total, this.lines));
}
}
return total;
}
private void SetSelectionVisible (bool value)
{
selection_visible = value;
// cursor and selection are enemies, we can't have both in the same room at the same time
if (owner.IsHandleCreated && !owner.show_caret_w_selection)
XplatUI.CaretVisible (owner.Handle, !selection_visible);
}
private void DecrementLines(int line_no) {
int current;
current = line_no;
while (current <= lines) {
GetLine(current).line_no--;
current++;
}
return;
}
private void IncrementLines(int line_no) {
int current;
current = this.lines;
while (current >= line_no) {
GetLine(current).line_no++;
current--;
}
return;
}
private void RebalanceAfterAdd(Line line1) {
Line line2;
while ((line1 != document) && (line1.parent.color == LineColor.Red)) {
if (line1.parent == line1.parent.parent.left) {
line2 = line1.parent.parent.right;
if ((line2 != null) && (line2.color == LineColor.Red)) {
line1.parent.color = LineColor.Black;
line2.color = LineColor.Black;
line1.parent.parent.color = LineColor.Red;
line1 = line1.parent.parent;
} else {
if (line1 == line1.parent.right) {
line1 = line1.parent;
RotateLeft(line1);
}
line1.parent.color = LineColor.Black;
line1.parent.parent.color = LineColor.Red;
RotateRight(line1.parent.parent);
}
} else {
line2 = line1.parent.parent.left;
if ((line2 != null) && (line2.color == LineColor.Red)) {
line1.parent.color = LineColor.Black;
line2.color = LineColor.Black;
line1.parent.parent.color = LineColor.Red;
line1 = line1.parent.parent;
} else {
if (line1 == line1.parent.left) {
line1 = line1.parent;
RotateRight(line1);
}
line1.parent.color = LineColor.Black;
line1.parent.parent.color = LineColor.Red;
RotateLeft(line1.parent.parent);
}
}
}
document.color = LineColor.Black;
}
private void RebalanceAfterDelete(Line line1) {
Line line2;
while ((line1 != document) && (line1.color == LineColor.Black)) {
if (line1 == line1.parent.left) {
line2 = line1.parent.right;
if (line2.color == LineColor.Red) {
line2.color = LineColor.Black;
line1.parent.color = LineColor.Red;
RotateLeft(line1.parent);
line2 = line1.parent.right;
}
if ((line2.left.color == LineColor.Black) && (line2.right.color == LineColor.Black)) {
line2.color = LineColor.Red;
line1 = line1.parent;
} else {
if (line2.right.color == LineColor.Black) {
line2.left.color = LineColor.Black;
line2.color = LineColor.Red;
RotateRight(line2);
line2 = line1.parent.right;
}
line2.color = line1.parent.color;
line1.parent.color = LineColor.Black;
line2.right.color = LineColor.Black;
RotateLeft(line1.parent);
line1 = document;
}
} else {
line2 = line1.parent.left;
if (line2.color == LineColor.Red) {
line2.color = LineColor.Black;
line1.parent.color = LineColor.Red;
RotateRight(line1.parent);
line2 = line1.parent.left;
}
if ((line2.right.color == LineColor.Black) && (line2.left.color == LineColor.Black)) {
line2.color = LineColor.Red;
line1 = line1.parent;
} else {
if (line2.left.color == LineColor.Black) {
line2.right.color = LineColor.Black;
line2.color = LineColor.Red;
RotateLeft(line2);
line2 = line1.parent.left;
}
line2.color = line1.parent.color;
line1.parent.color = LineColor.Black;
line2.left.color = LineColor.Black;
RotateRight(line1.parent);
line1 = document;
}
}
}
line1.color = LineColor.Black;
}
private void RotateLeft(Line line1) {
Line line2 = line1.right;
line1.right = line2.left;
if (line2.left != sentinel) {
line2.left.parent = line1;
}
if (line2 != sentinel) {
line2.parent = line1.parent;
}
if (line1.parent != null) {
if (line1 == line1.parent.left) {
line1.parent.left = line2;
} else {
line1.parent.right = line2;
}
} else {
document = line2;
}
line2.left = line1;
if (line1 != sentinel) {
line1.parent = line2;
}
}
private void RotateRight(Line line1) {
Line line2 = line1.left;
line1.left = line2.right;
if (line2.right != sentinel) {
line2.right.parent = line1;
}
if (line2 != sentinel) {
line2.parent = line1.parent;
}
if (line1.parent != null) {
if (line1 == line1.parent.right) {
line1.parent.right = line2;
} else {
line1.parent.left = line2;
}
} else {
document = line2;
}
line2.right = line1;
if (line1 != sentinel) {
line1.parent = line2;
}
}
internal void UpdateView(Line line, int pos) {
if (!owner.IsHandleCreated) {
return;
}
if (update_suspended > 0) {
update_start = Math.Min (update_start, line.line_no);
// update_end = Math.Max (update_end, line.line_no);
// recalc_optimize = true;
update_pending = true;
return;
}
// Optimize invalidation based on Line alignment
if (RecalculateDocument(owner.CreateGraphicsInternal(), line.line_no, line.line_no, true)) {
// Lineheight changed, invalidate the rest of the document
if ((line.Y - viewport_y) >=0 ) {
// We formatted something that's in view, only draw parts of the screen
owner.Invalidate(new Rectangle(0, line.Y - viewport_y, viewport_width, owner.Height - line.Y - viewport_y));
} else {
// The tag was above the visible area, draw everything
owner.Invalidate();
}
} else {
switch(line.alignment) {
case HorizontalAlignment.Left: {
owner.Invalidate(new Rectangle(line.X + (int)line.widths[pos] - viewport_x - 1, line.Y - viewport_y, viewport_width, line.height + 1));
break;
}
case HorizontalAlignment.Center: {
owner.Invalidate(new Rectangle(line.X, line.Y - viewport_y, viewport_width, line.height + 1));
break;
}
case HorizontalAlignment.Right: {
owner.Invalidate(new Rectangle(line.X, line.Y - viewport_y, (int)line.widths[pos + 1] - viewport_x + line.X, line.height + 1));
break;
}
}
}
}
// Update display from line, down line_count lines; pos is unused, but required for the signature
internal void UpdateView(Line line, int line_count, int pos) {
if (!owner.IsHandleCreated) {
return;
}
if (recalc_suspended > 0) {
recalc_start = Math.Min (recalc_start, line.line_no);
recalc_end = Math.Max (recalc_end, line.line_no + line_count - 1);
recalc_optimize = true;
recalc_pending = true;
return;
}
if (RecalculateDocument(owner.CreateGraphicsInternal(), line.line_no, line.line_no + line_count - 1, true)) {
// Lineheight changed, invalidate the rest of the document
if ((line.Y - viewport_y) >=0 ) {
// We formatted something that's in view, only draw parts of the screen
//blah Console.WriteLine("TextControl.cs(981) Invalidate called in UpdateView(line, line_count, pos)");
owner.Invalidate(new Rectangle(0, line.Y - viewport_y, viewport_width, owner.Height - line.Y - viewport_y));
} else {
// The tag was above the visible area, draw everything
//blah Console.WriteLine("TextControl.cs(985) Invalidate called in UpdateView(line, line_count, pos)");
owner.Invalidate();
}
} else {
Line end_line;
end_line = GetLine(line.line_no + line_count -1);
if (end_line == null) {
end_line = line;
}
//blah Console.WriteLine("TextControl.cs(996) Invalidate called in UpdateView(line, line_count, pos)");
owner.Invalidate(new Rectangle(0 - viewport_x, line.Y - viewport_y, (int)line.widths[line.text.Length], end_line.Y + end_line.height));
}
}
#endregion // Private Methods
#region Internal Methods
// Clear the document and reset state
internal void Empty() {
document = sentinel;
lines = 0;
// We always have a blank line
Add(1, "", owner.Font, ThemeEngine.Current.ResPool.GetSolidBrush(owner.ForeColor));
Line l = GetLine (1);
l.soft_break = true;
this.RecalculateDocument(owner.CreateGraphicsInternal());
PositionCaret(0, 0);
SetSelectionVisible (false);
selection_start.line = this.document;
selection_start.pos = 0;
selection_start.tag = selection_start.line.tags;
selection_end.line = this.document;
selection_end.pos = 0;
selection_end.tag = selection_end.line.tags;
char_count = 0;
viewport_x = 0;
viewport_y = 0;
document_x = 0;
document_y = 0;
if (owner.IsHandleCreated)
owner.Invalidate ();
}
internal void PositionCaret(Line line, int pos) {
caret.tag = line.FindTag(pos);
caret.line = line;
caret.pos = pos;
if (owner.IsHandleCreated) {
if (owner.Focused) {
if (caret.height != caret.tag.height)
XplatUI.CreateCaret (owner.Handle, caret_width, caret.height);
XplatUI.SetCaretPos(owner.Handle, (int)caret.tag.line.widths[caret.pos] + caret.line.X - viewport_x, caret.line.Y + caret.tag.shift - viewport_y + caret_shift);
}
if (CaretMoved != null) CaretMoved(this, EventArgs.Empty);
}
// We set this at the end because we use the heights to determine whether or
// not we need to recreate the caret
caret.height = caret.tag.height;
}
internal void PositionCaret(int x, int y) {
if (!owner.IsHandleCreated) {
return;
}
caret.tag = FindCursor(x, y, out caret.pos);
caret.line = caret.tag.line;
caret.height = caret.tag.height;
if (owner.Focused) {
XplatUI.CreateCaret (owner.Handle, caret_width, caret.height);
XplatUI.SetCaretPos(owner.Handle, (int)caret.tag.line.widths[caret.pos] + caret.line.X - viewport_x, caret.line.Y + caret.tag.shift - viewport_y + caret_shift);
}
if (CaretMoved != null) CaretMoved(this, EventArgs.Empty);
}
internal void CaretHasFocus() {
if ((caret.tag != null) && owner.IsHandleCreated) {
XplatUI.CreateCaret(owner.Handle, caret_width, caret.height);
XplatUI.SetCaretPos(owner.Handle, (int)caret.tag.line.widths[caret.pos] + caret.line.X - viewport_x, caret.line.Y + caret.tag.shift - viewport_y + caret_shift);
DisplayCaret ();
}
if (owner.IsHandleCreated && selection_visible) {
InvalidateSelectionArea ();
}
}
internal void CaretLostFocus() {
if (!owner.IsHandleCreated) {
return;
}
XplatUI.DestroyCaret(owner.Handle);
}
internal void AlignCaret() {
if (!owner.IsHandleCreated) {
return;
}
caret.tag = LineTag.FindTag(caret.line, caret.pos);
caret.height = caret.tag.height;
if (owner.Focused) {
XplatUI.CreateCaret(owner.Handle, caret_width, caret.height);
XplatUI.SetCaretPos(owner.Handle, (int)caret.tag.line.widths[caret.pos] + caret.line.X - viewport_x, caret.line.Y + caret.tag.shift - viewport_y + caret_shift);
DisplayCaret ();
}
if (CaretMoved != null) CaretMoved(this, EventArgs.Empty);
}
internal void UpdateCaret() {
if (!owner.IsHandleCreated || caret.tag == null) {
return;
}
if (caret.tag.height != caret.height) {
caret.height = caret.tag.height;
if (owner.Focused) {
XplatUI.CreateCaret(owner.Handle, caret_width, caret.height);
}
}
XplatUI.SetCaretPos(owner.Handle, (int)caret.tag.line.widths[caret.pos] + caret.line.X - viewport_x, caret.line.Y + caret.tag.shift - viewport_y + caret_shift);
DisplayCaret ();
if (CaretMoved != null) CaretMoved(this, EventArgs.Empty);
}
internal void DisplayCaret() {
if (!owner.IsHandleCreated) {
return;
}
if (owner.ShowSelection && (!selection_visible || owner.show_caret_w_selection)) {
XplatUI.CaretVisible(owner.Handle, true);
}
}
internal void HideCaret() {
if (!owner.IsHandleCreated) {
return;
}
if (owner.Focused) {
XplatUI.CaretVisible(owner.Handle, false);
}
}
internal void MoveCaret(CaretDirection direction) {
// FIXME should we use IsWordSeparator to detect whitespace, instead
// of looking for actual spaces in the Word move cases?
bool nowrap = false;
switch(direction) {
case CaretDirection.CharForwardNoWrap:
nowrap = true;
goto case CaretDirection.CharForward;
case CaretDirection.CharForward: {
caret.pos++;
if (caret.pos > caret.line.text.Length) {
if (!nowrap) {
// Go into next line
if (caret.line.line_no < this.lines) {
caret.line = GetLine(caret.line.line_no+1);
caret.pos = 0;
caret.tag = caret.line.tags;
} else {
caret.pos--;
}
} else {
// Single line; we stay where we are
caret.pos--;
}
} else {
if ((caret.tag.start - 1 + caret.tag.length) < caret.pos) {
caret.tag = caret.tag.next;
}
}
UpdateCaret();
return;
}
case CaretDirection.CharBackNoWrap:
nowrap = true;
goto case CaretDirection.CharBack;
case CaretDirection.CharBack: {
if (caret.pos > 0) {
// caret.pos--; // folded into the if below
if (--caret.pos > 0) {
if (caret.tag.start > caret.pos) {
caret.tag = caret.tag.previous;
}
}
} else {
if (caret.line.line_no > 1 && !nowrap) {
caret.line = GetLine(caret.line.line_no - 1);
caret.pos = caret.line.text.Length;
caret.tag = LineTag.FindTag(caret.line, caret.pos);
}
}
UpdateCaret();
return;
}
case CaretDirection.WordForward: {
int len;
len = caret.line.text.Length;
if (caret.pos < len) {
while ((caret.pos < len) && (caret.line.text[caret.pos] != ' ')) {
caret.pos++;
}
if (caret.pos < len) {
// Skip any whitespace
while ((caret.pos < len) && (caret.line.text[caret.pos] == ' ')) {
caret.pos++;
}
}
caret.tag = LineTag.FindTag(caret.line, caret.pos);
} else {
if (caret.line.line_no < this.lines) {
caret.line = GetLine(caret.line.line_no + 1);
caret.pos = 0;
caret.tag = caret.line.tags;
}
}
UpdateCaret();
return;
}
case CaretDirection.WordBack: {
if (caret.pos > 0) {
caret.pos--;
while ((caret.pos > 0) && (caret.line.text[caret.pos] == ' ')) {
caret.pos--;
}
while ((caret.pos > 0) && (caret.line.text[caret.pos] != ' ')) {
caret.pos--;
}
if (caret.line.text.ToString(caret.pos, 1) == " ") {
if (caret.pos != 0) {
caret.pos++;
} else {
caret.line = GetLine(caret.line.line_no - 1);
caret.pos = caret.line.text.Length;
}
}
caret.tag = LineTag.FindTag(caret.line, caret.pos);
} else {
if (caret.line.line_no > 1) {
caret.line = GetLine(caret.line.line_no - 1);
caret.pos = caret.line.text.Length;
caret.tag = LineTag.FindTag(caret.line, caret.pos);
}
}
UpdateCaret();
return;
}
case CaretDirection.LineUp: {
if (caret.line.line_no > 1) {
int pixel;
pixel = (int)caret.line.widths[caret.pos];
PositionCaret(pixel, GetLine(caret.line.line_no - 1).Y);
DisplayCaret ();
}
return;
}
case CaretDirection.LineDown: {
if (caret.line.line_no < lines) {
int pixel;
pixel = (int)caret.line.widths[caret.pos];
PositionCaret(pixel, GetLine(caret.line.line_no + 1).Y);
DisplayCaret ();
}
return;
}
case CaretDirection.Home: {
if (caret.pos > 0) {
caret.pos = 0;
caret.tag = caret.line.tags;
UpdateCaret();
}
return;
}
case CaretDirection.End: {
if (caret.pos < caret.line.text.Length) {
caret.pos = caret.line.text.Length;
caret.tag = LineTag.FindTag(caret.line, caret.pos);
UpdateCaret();
}
return;
}
case CaretDirection.PgUp: {
int new_y, y_offset;
if (viewport_y == 0) {
// This should probably be handled elsewhere
if (!(owner is RichTextBox)) {
// Page down doesn't do anything in a regular TextBox
// if the bottom of the document
// is already visible, the page and the caret stay still
return;
}
// We're just placing the caret at the end of the document, no scrolling needed
owner.vscroll.Value = 0;
Line line = GetLine (1);
PositionCaret (line, 0);
}
y_offset = caret.line.Y - viewport_y;
new_y = caret.line.Y - viewport_height;
owner.vscroll.Value = Math.Max (new_y, 0);
PositionCaret ((int)caret.line.widths[caret.pos], y_offset + viewport_y);
return;
}
case CaretDirection.PgDn: {
int new_y, y_offset;
if ((viewport_y + viewport_height) > document_y) {
// This should probably be handled elsewhere
if (!(owner is RichTextBox)) {
// Page up doesn't do anything in a regular TextBox
// if the bottom of the document
// is already visible, the page and the caret stay still
return;
}
// We're just placing the caret at the end of the document, no scrolling needed
owner.vscroll.Value = owner.vscroll.Maximum - viewport_height + 1;
Line line = GetLine (lines);
PositionCaret (line, line.Text.Length);
}
y_offset = caret.line.Y - viewport_y;
new_y = caret.line.Y + viewport_height;
owner.vscroll.Value = Math.Min (new_y, owner.vscroll.Maximum - viewport_height + 1);
PositionCaret ((int)caret.line.widths[caret.pos], y_offset + viewport_y);
return;
}
case CaretDirection.CtrlPgUp: {
PositionCaret(0, viewport_y);
DisplayCaret ();
return;
}
case CaretDirection.CtrlPgDn: {
Line line;
LineTag tag;
int index;
tag = FindTag(0, viewport_y + viewport_height, out index, false);
if (tag.line.line_no > 1) {
line = GetLine(tag.line.line_no - 1);
} else {
line = tag.line;
}
PositionCaret(line, line.Text.Length);
DisplayCaret ();
return;
}
case CaretDirection.CtrlHome: {
caret.line = GetLine(1);
caret.pos = 0;
caret.tag = caret.line.tags;
UpdateCaret();
return;
}
case CaretDirection.CtrlEnd: {
caret.line = GetLine(lines);
caret.pos = caret.line.text.Length;
caret.tag = LineTag.FindTag(caret.line, caret.pos);
UpdateCaret();
return;
}
case CaretDirection.SelectionStart: {
caret.line = selection_start.line;
caret.pos = selection_start.pos;
caret.tag = selection_start.tag;
UpdateCaret();
return;
}
case CaretDirection.SelectionEnd: {
caret.line = selection_end.line;
caret.pos = selection_end.pos;
caret.tag = selection_end.tag;
UpdateCaret();
return;
}
}
}
internal void DumpDoc ()
{
Console.WriteLine ("");
for (int i = 1; i < lines; i++) {
Line line = GetLine (i);
Console.WriteLine ("", line.line_no);
LineTag tag = line.tags;
while (tag != null) {
Console.Write ("\t", tag.color.Color);
Console.Write (tag.Text ());
Console.WriteLine ("\t");
tag = tag.next;
}
Console.WriteLine ("");
}
Console.WriteLine ("");
}
internal void Draw (Graphics g, Rectangle clip)
{
Line line; // Current line being drawn
LineTag tag; // Current tag being drawn
int start; // First line to draw
int end; // Last line to draw
StringBuilder text; // String representing the current line
int line_no;
Brush tag_brush;
Brush current_brush;
Brush disabled_brush;
Brush hilight;
Brush hilight_text;
RecalculateAlignments ();
// First, figure out from what line to what line we need to draw
if (multiline) {
start = GetLineByPixel(clip.Top + viewport_y, false).line_no;
end = GetLineByPixel(clip.Bottom + viewport_y, false).line_no;
} else {
start = GetLineByPixel(clip.Left + viewport_x, false).line_no;
end = GetLineByPixel(clip.Right + viewport_x, false).line_no;
}
/// Make sure that we aren't drawing one more line then we need to
line = GetLine (end - 1);
if (line != null && clip.Bottom == line.Y + line.height + viewport_y)
end--;
line_no = start;
#if Debug
DateTime n = DateTime.Now;
Console.WriteLine ("Started drawing: {0}s {1}ms", n.Second, n.Millisecond);
Console.WriteLine ("CLIP: {0}", clip);
Console.WriteLine ("S: {0}", GetLine (start).text);
Console.WriteLine ("E: {0}", GetLine (end).text);
#endif
disabled_brush = ThemeEngine.Current.ResPool.GetSolidBrush(ThemeEngine.Current.ColorGrayText);
hilight = ThemeEngine.Current.ResPool.GetSolidBrush(ThemeEngine.Current.ColorHighlight);
hilight_text = ThemeEngine.Current.ResPool.GetSolidBrush(ThemeEngine.Current.ColorHighlightText);
// Non multiline selection can be handled outside of the loop
if (!multiline && selection_visible && owner.ShowSelection) {
g.FillRectangle (hilight,
selection_start.line.widths [selection_start.pos] +
selection_start.line.X - viewport_x,
selection_start.line.Y,
(selection_end.line.X + selection_end.line.widths [selection_end.pos]) -
(selection_start.line.X + selection_start.line.widths [selection_start.pos]),
selection_start.line.height);
}
while (line_no <= end) {
line = GetLine (line_no);
float line_y = line.Y - viewport_y;
tag = line.tags;
if (!calc_pass) {
text = line.text;
} else {
if (PasswordCache.Length < line.text.Length)
PasswordCache.Append(Char.Parse(password_char), line.text.Length - PasswordCache.Length);
else if (PasswordCache.Length > line.text.Length)
PasswordCache.Remove(line.text.Length, PasswordCache.Length - line.text.Length);
text = PasswordCache;
}
int line_selection_start = text.Length + 1;
int line_selection_end = text.Length + 1;
if (selection_visible && owner.ShowSelection &&
(line_no >= selection_start.line.line_no) &&
(line_no <= selection_end.line.line_no)) {
if (line_no == selection_start.line.line_no)
line_selection_start = selection_start.pos + 1;
else
line_selection_start = 1;
if (line_no == selection_end.line.line_no)
line_selection_end = selection_end.pos + 1;
else
line_selection_end = text.Length + 1;
if (line_selection_end == line_selection_start) {
// There isn't really selection
line_selection_start = text.Length + 1;
line_selection_end = line_selection_start;
} else if (multiline) {
// lets draw some selection baby!! (non multiline selection is drawn outside the loop)
g.FillRectangle (hilight,
line.widths [line_selection_start - 1] + line.X - viewport_x,
line_y, line.widths [line_selection_end - 1] - line.widths [line_selection_start - 1],
line.height);
}
}
current_brush = line.tags.color;
while (tag != null) {
// Skip empty tags
if (tag.length == 0) {
tag = tag.next;
continue;
}
if (((tag.X + tag.width) < (clip.Left - viewport_x)) && (tag.X > (clip.Right - viewport_x))) {
tag = tag.next;
continue;
}
if (tag.back_color != null) {
g.FillRectangle (tag.back_color, tag.X + line.X - viewport_x,
line_y + tag.shift, tag.width, line.height);
}
tag_brush = tag.color;
current_brush = tag_brush;
if (!owner.is_enabled) {
Color a = ((SolidBrush) tag.color).Color;
Color b = ThemeEngine.Current.ColorWindowText;
if ((a.R == b.R) && (a.G == b.G) && (a.B == b.B)) {
tag_brush = disabled_brush;
}
}
int tag_pos = tag.start;
current_brush = tag_brush;
while (tag_pos < tag.start + tag.length) {
int old_tag_pos = tag_pos;
if (tag_pos >= line_selection_start && tag_pos < line_selection_end) {
current_brush = hilight_text;
tag_pos = Math.Min (tag.end, line_selection_end);
} else if (tag_pos < line_selection_start) {
current_brush = tag.color;
tag_pos = Math.Min (tag.end, line_selection_start);
} else {
current_brush = tag.color;
tag_pos = tag.end;
}
tag.Draw (g, current_brush,
line.widths [old_tag_pos - 1] + line.X - viewport_x,
line_y + tag.shift,
old_tag_pos - 1, Math.Min (tag.length, tag_pos - old_tag_pos),
text.ToString() );
}
tag = tag.next;
}
line_no++;
}
}
private void InsertLineString (Line line, int pos, string s)
{
bool carriage_return = false;
if (s.EndsWith ("\r")) {
s = s.Substring (0, s.Length - 1);
carriage_return = true;
}
InsertString (line, pos, s);
if (carriage_return) {
Line l = GetLine (line.line_no);
l.carriage_return = true;
}
}
// Insert multi-line text at the given position; use formatting at insertion point for inserted text
internal void Insert(Line line, int pos, bool update_caret, string s) {
int break_index;
int base_line;
int old_line_count;
int count = 1;
LineTag tag = LineTag.FindTag (line, pos);
SuspendRecalc ();
base_line = line.line_no;
old_line_count = lines;
break_index = s.IndexOf ('\n');
// Bump the text at insertion point a line down if we're inserting more than one line
if (break_index > -1) {
Split(line, pos);
line.soft_break = false;
// Remainder of start line is now in base_line + 1
}
if (break_index == -1)
break_index = s.Length;
InsertLineString (line, pos, s.Substring (0, break_index));
break_index++;
while (break_index < s.Length) {
bool soft = false;
int next_break = s.IndexOf ('\n', break_index);
int adjusted_next_break;
bool carriage_return = false;
if (next_break == -1) {
next_break = s.Length;
soft = true;
}
adjusted_next_break = next_break;
if (s [next_break - 1] == '\r') {
adjusted_next_break--;
carriage_return = true;
}
string line_text = s.Substring (break_index, adjusted_next_break - break_index);
Add (base_line + count, line_text, line.alignment, tag.font, tag.color);
if (carriage_return) {
Line last = GetLine (base_line + count);
last.carriage_return = true;
if (soft)
last.soft_break = true;
} else if (soft) {
Line last = GetLine (base_line + count);
last.soft_break = true;
}
count++;
break_index = next_break + 1;
}
ResumeRecalc (true);
UpdateView(line, lines - old_line_count + 1, pos);
if (update_caret) {
// Move caret to the end of the inserted text
Line l = GetLine (line.line_no + lines - old_line_count);
PositionCaret(l, l.text.Length);
DisplayCaret ();
}
}
// Inserts a character at the given position
internal void InsertString(Line line, int pos, string s) {
InsertString(line.FindTag(pos), pos, s);
}
// Inserts a string at the given position
internal void InsertString(LineTag tag, int pos, string s) {
Line line;
int len;
len = s.Length;
CharCount += len;
line = tag.line;
line.text.Insert(pos, s);
tag = tag.next;
while (tag != null) {
tag.start += len;
tag = tag.next;
}
line.Grow(len);
line.recalc = true;
UpdateView(line, pos);
}
// Inserts a string at the caret position
internal void InsertStringAtCaret(string s, bool move_caret) {
InsertString (caret.tag, caret.pos, s);
UpdateView(caret.line, caret.pos);
if (move_caret) {
caret.pos += s.Length;
UpdateCaret();
}
}
// Inserts a character at the given position
internal void InsertChar(Line line, int pos, char ch) {
InsertChar(line.FindTag(pos), pos, ch);
}
// Inserts a character at the given position
internal void InsertChar(LineTag tag, int pos, char ch) {
Line line;
CharCount++;
line = tag.line;
line.text.Insert(pos, ch);
// tag.length++;
tag = tag.next;
while (tag != null) {
tag.start++;
tag = tag.next;
}
line.Grow(1);
line.recalc = true;
undo.RecordTyping (line, pos, ch);
UpdateView(line, pos);
}
// Inserts a character at the current caret position
internal void InsertCharAtCaret(char ch, bool move_caret) {
/*
LineTag tag;
CharCount++;
caret.line.text.Insert(caret.pos, ch);
caret.tag.length++;
if (caret.tag.next != null) {
tag = caret.tag.next;
while (tag != null) {
tag.start++;
tag = tag.next;
}
}
caret.line.Grow(1);
caret.line.recalc = true;
*/
InsertChar (caret.tag, caret.pos, ch);
UpdateView(caret.line, caret.pos);
if (move_caret) {
caret.pos++;
UpdateCaret();
SetSelectionToCaret(true);
}
}
internal void InsertImage (LineTag tag, int pos, Image image)
{
Line line;
int len;
len = 1;
line = tag.line;
line.text.Insert (pos, "I");
LineTag next_tag = tag.Break (pos);
ImageTag image_tag = new ImageTag (line, pos, image);
image_tag.CopyFormattingFrom (tag);
image_tag.next = next_tag;
image_tag.previous = tag;
tag.next = image_tag;
tag = image_tag.next;
while (tag != null) {
tag.start += len;
tag = tag.next;
}
line.Grow (len);
line.recalc = true;
DumpDoc ();
UpdateView (line, pos);
}
internal void DeleteMultiline (Line start_line, int pos, int length)
{
Marker start = new Marker ();
Marker end = new Marker ();
int start_index = LineTagToCharIndex (start_line, pos);
start.line = start_line;
start.pos = pos;
start.tag = LineTag.FindTag (start_line, pos);
CharIndexToLineTag (start_index + length, out end.line,
out end.tag, out end.pos);
SuspendUpdate ();
if (start.line == end.line) {
DeleteChars (start.tag, pos, end.pos - pos);
} else {
// Delete first and last lines
DeleteChars (start.tag, start.pos, start.line.text.Length - start.pos);
DeleteChars (end.line.tags, 0, end.pos);
int current = start.line.line_no + 1;
if (current < end.line.line_no) {
for (int i = end.line.line_no - 1; i >= current; i--) {
Delete (i);
}
}
// BIG FAT WARNING - selection_end.line might be stale due
// to the above Delete() call. DONT USE IT before hitting the end of this method!
// Join start and end
Combine (start.line.line_no, current);
}
ResumeUpdate (true);
}
// Deletes n characters at the given position; it will not delete past line limits
// pos is 0-based
internal void DeleteChars(LineTag tag, int pos, int count) {
Line line;
bool streamline;
streamline = false;
line = tag.line;
CharCount -= count;
if (pos == line.text.Length) {
return;
}
line.text.Remove(pos, count);
// Make sure the tag points to the right spot
while ((tag != null) && (tag.end) < pos) {
tag = tag.next;
}
if (tag == null) {
return;
}
// Check if we're crossing tag boundaries
if ((pos + count) > (tag.start + tag.length - 1)) {
int left;
// We have to delete cross tag boundaries
streamline = true;
left = count;
left -= tag.start + tag.length - pos - 1;
tag = tag.next;
while ((tag != null) && (left > 0)) {
tag.start -= count - left;
if (tag.length > left) {
left = 0;
} else {
left -= tag.length;
tag = tag.next;
}
}
} else {
// We got off easy, same tag
if (tag.length == 0) {
streamline = true;
}
}
// Delete empty orphaned tags at the end
LineTag walk = tag;
while (walk != null && walk.next != null && walk.next.length == 0) {
LineTag t = walk;
walk.next = walk.next.next;
if (walk.next != null)
walk.next.previous = t;
walk = walk.next;
}
// Adjust the start point of any tags following
if (tag != null) {
tag = tag.next;
while (tag != null) {
tag.start -= count;
tag = tag.next;
}
}
line.recalc = true;
if (streamline) {
line.Streamline(lines);
}
UpdateView(line, pos);
}
// Deletes a character at or after the given position (depending on forward); it will not delete past line limits
internal void DeleteChar(LineTag tag, int pos, bool forward) {
Line line;
bool streamline;
CharCount--;
streamline = false;
line = tag.line;
if ((pos == 0 && forward == false) || (pos == line.text.Length && forward == true)) {
return;
}
if (forward) {
line.text.Remove(pos, 1);
while ((tag != null) && (tag.start + tag.length - 1) <= pos) {
tag = tag.next;
}
if (tag == null) {
return;
}
// tag.length--;
if (tag.length == 0) {
streamline = true;
}
} else {
pos--;
line.text.Remove(pos, 1);
if (pos >= (tag.start - 1)) {
// tag.length--;
if (tag.length == 0) {
streamline = true;
}
} else if (tag.previous != null) {
// tag.previous.length--;
if (tag.previous.length == 0) {
streamline = true;
}
}
}
// Delete empty orphaned tags at the end
LineTag walk = tag;
while (walk != null && walk.next != null && walk.next.length == 0) {
LineTag t = walk;
walk.next = walk.next.next;
if (walk.next != null)
walk.next.previous = t;
walk = walk.next;
}
tag = tag.next;
while (tag != null) {
tag.start--;
tag = tag.next;
}
line.recalc = true;
if (streamline) {
line.Streamline(lines);
}
UpdateView(line, pos);
}
// Combine two lines
internal void Combine(int FirstLine, int SecondLine) {
Combine(GetLine(FirstLine), GetLine(SecondLine));
}
internal void Combine(Line first, Line second) {
LineTag last;
int shift;
// Combine the two tag chains into one
last = first.tags;
// Maintain the line ending style
first.soft_break = second.soft_break;
while (last.next != null) {
last = last.next;
}
// need to get the shift before setting the next tag since that effects length
shift = last.start + last.length - 1;
last.next = second.tags;
last.next.previous = last;
// Fix up references within the chain
last = last.next;
while (last != null) {
last.line = first;
last.start += shift;
last = last.next;
}
// Combine both lines' strings
first.text.Insert(first.text.Length, second.text.ToString());
first.Grow(first.text.Length);
// Remove the reference to our (now combined) tags from the doomed line
second.tags = null;
// Renumber lines
DecrementLines(first.line_no + 2); // first.line_no + 1 will be deleted, so we need to start renumbering one later
// Mop up
first.recalc = true;
first.height = 0; // This forces RecalcDocument/UpdateView to redraw from this line on
first.Streamline(lines);
// Update Caret, Selection, etc
if (caret.line == second) {
caret.Combine(first, shift);
}
if (selection_anchor.line == second) {
selection_anchor.Combine(first, shift);
}
if (selection_start.line == second) {
selection_start.Combine(first, shift);
}
if (selection_end.line == second) {
selection_end.Combine(first, shift);
}
#if Debug
Line check_first;
Line check_second;
check_first = GetLine(first.line_no);
check_second = GetLine(check_first.line_no + 1);
Console.WriteLine("Pre-delete: Y of first line: {0}, second line: {1}", check_first.Y, check_second.Y);
#endif
this.Delete(second);
#if Debug
check_first = GetLine(first.line_no);
check_second = GetLine(check_first.line_no + 1);
Console.WriteLine("Post-delete Y of first line: {0}, second line: {1}", check_first.Y, check_second.Y);
#endif
}
// Split the line at the position into two
internal void Split(int LineNo, int pos) {
Line line;
LineTag tag;
line = GetLine(LineNo);
tag = LineTag.FindTag(line, pos);
Split(line, tag, pos, false);
}
internal void Split(Line line, int pos) {
LineTag tag;
tag = LineTag.FindTag(line, pos);
Split(line, tag, pos, false);
}
///Split line at given tag and position into two lines
///True if the split should be marked as 'soft', indicating that it can be contracted
///if more space becomes available on previous line
internal void Split(Line line, LineTag tag, int pos, bool soft) {
LineTag new_tag;
Line new_line;
bool move_caret;
bool move_sel_start;
bool move_sel_end;
move_caret = false;
move_sel_start = false;
move_sel_end = false;
// Adjust selection and cursors
if (caret.line == line && caret.pos >= pos) {
move_caret = true;
}
if (selection_start.line == line && selection_start.pos > pos) {
move_sel_start = true;
}
if (selection_end.line == line && selection_end.pos > pos) {
move_sel_end = true;
}
// cover the easy case first
if (pos == line.text.Length) {
Add(line.line_no + 1, "", line.alignment, tag.font, tag.color);
new_line = GetLine(line.line_no + 1);
line.carriage_return = false;
new_line.carriage_return = line.carriage_return;
new_line.soft_break = soft;
if (move_caret) {
caret.line = new_line;
caret.tag = new_line.tags;
caret.pos = 0;
}
if (move_sel_start) {
selection_start.line = new_line;
selection_start.pos = 0;
selection_start.tag = new_line.tags;
}
if (move_sel_end) {
selection_end.line = new_line;
selection_end.pos = 0;
selection_end.tag = new_line.tags;
}
return;
}
// We need to move the rest of the text into the new line
Add (line.line_no + 1, line.text.ToString (pos, line.text.Length - pos), line.alignment, tag.font, tag.color);
// Now transfer our tags from this line to the next
new_line = GetLine(line.line_no + 1);
line.carriage_return = false;
new_line.carriage_return = line.carriage_return;
new_line.soft_break = soft;
line.recalc = true;
new_line.recalc = true;
if ((tag.start - 1) == pos) {
int shift;
// We can simply break the chain and move the tag into the next line
if (tag == line.tags) {
new_tag = new LineTag(line, 1);
new_tag.CopyFormattingFrom (tag);
line.tags = new_tag;
}
if (tag.previous != null) {
tag.previous.next = null;
}
new_line.tags = tag;
tag.previous = null;
tag.line = new_line;
// Walk the list and correct the start location of the tags we just bumped into the next line
shift = tag.start - 1;
new_tag = tag;
while (new_tag != null) {
new_tag.start -= shift;
new_tag.line = new_line;
new_tag = new_tag.next;
}
} else {
int shift;
new_tag = new LineTag (new_line, 1);
new_tag.next = tag.next;
new_tag.CopyFormattingFrom (tag);
new_line.tags = new_tag;
if (new_tag.next != null) {
new_tag.next.previous = new_tag;
}
tag.next = null;
shift = pos;
new_tag = new_tag.next;
while (new_tag != null) {
new_tag.start -= shift;
new_tag.line = new_line;
new_tag = new_tag.next;
}
}
if (move_caret) {
caret.line = new_line;
caret.pos = caret.pos - pos;
caret.tag = caret.line.FindTag(caret.pos);
}
if (move_sel_start) {
selection_start.line = new_line;
selection_start.pos = selection_start.pos - pos;
selection_start.tag = new_line.FindTag(selection_start.pos);
}
if (move_sel_end) {
selection_end.line = new_line;
selection_end.pos = selection_end.pos - pos;
selection_end.tag = new_line.FindTag(selection_end.pos);
}
CharCount -= line.text.Length - pos;
line.text.Remove(pos, line.text.Length - pos);
}
// Adds a line of text, with given font.
// Bumps any line at that line number that already exists down
internal void Add(int LineNo, string Text, Font font, SolidBrush color) {
Add(LineNo, Text, HorizontalAlignment.Left, font, color);
}
internal void Add(int LineNo, string Text, HorizontalAlignment align, Font font, SolidBrush color) {
Line add;
Line line;
int line_no;
CharCount += Text.Length;
if (LineNo<1 || Text == null) {
if (LineNo<1) {
throw new ArgumentNullException("LineNo", "Line numbers must be positive");
} else {
throw new ArgumentNullException("Text", "Cannot insert NULL line");
}
}
add = new Line (this, LineNo, Text, align, font, color);
line = document;
while (line != sentinel) {
add.parent = line;
line_no = line.line_no;
if (LineNo > line_no) {
line = line.right;
} else if (LineNo < line_no) {
line = line.left;
} else {
// Bump existing line numbers; walk all nodes to the right of this one and increment line_no
IncrementLines(line.line_no);
line = line.left;
}
}
add.left = sentinel;
add.right = sentinel;
if (add.parent != null) {
if (LineNo > add.parent.line_no) {
add.parent.right = add;
} else {
add.parent.left = add;
}
} else {
// Root node
document = add;
}
RebalanceAfterAdd(add);
lines++;
}
internal virtual void Clear() {
lines = 0;
CharCount = 0;
document = sentinel;
}
public virtual object Clone() {
Document clone;
clone = new Document(null);
clone.lines = this.lines;
clone.document = (Line)document.Clone();
return clone;
}
internal void Delete(int LineNo) {
Line line;
if (LineNo>lines) {
return;
}
line = GetLine(LineNo);
CharCount -= line.text.Length;
DecrementLines(LineNo + 1);
Delete(line);
}
internal void Delete(Line line1) {
Line line2;// = new Line();
Line line3;
if ((line1.left == sentinel) || (line1.right == sentinel)) {
line3 = line1;
} else {
line3 = line1.right;
while (line3.left != sentinel) {
line3 = line3.left;
}
}
if (line3.left != sentinel) {
line2 = line3.left;
} else {
line2 = line3.right;
}
line2.parent = line3.parent;
if (line3.parent != null) {
if(line3 == line3.parent.left) {
line3.parent.left = line2;
} else {
line3.parent.right = line2;
}
} else {
document = line2;
}
if (line3 != line1) {
LineTag tag;
if (selection_start.line == line3) {
selection_start.line = line1;
}
if (selection_end.line == line3) {
selection_end.line = line1;
}
if (selection_anchor.line == line3) {
selection_anchor.line = line1;
}
if (caret.line == line3) {
caret.line = line1;
}
line1.alignment = line3.alignment;
line1.ascent = line3.ascent;
line1.hanging_indent = line3.hanging_indent;
line1.height = line3.height;
line1.indent = line3.indent;
line1.line_no = line3.line_no;
line1.recalc = line3.recalc;
line1.right_indent = line3.right_indent;
line1.soft_break = line3.soft_break;
line1.space = line3.space;
line1.tags = line3.tags;
line1.text = line3.text;
line1.widths = line3.widths;
line1.offset = line3.offset;
tag = line1.tags;
while (tag != null) {
tag.line = line1;
tag = tag.next;
}
}
if (line3.color == LineColor.Black)
RebalanceAfterDelete(line2);
this.lines--;
}
// Invalidate a section of the document to trigger redraw
internal void Invalidate(Line start, int start_pos, Line end, int end_pos) {
Line l1;
Line l2;
int p1;
int p2;
if ((start == end) && (start_pos == end_pos)) {
return;
}
if (end_pos == -1) {
end_pos = end.text.Length;
}
// figure out what's before what so the logic below is straightforward
if (start.line_no < end.line_no) {
l1 = start;
p1 = start_pos;
l2 = end;
p2 = end_pos;
} else if (start.line_no > end.line_no) {
l1 = end;
p1 = end_pos;
l2 = start;
p2 = start_pos;
} else {
if (start_pos < end_pos) {
l1 = start;
p1 = start_pos;
l2 = end;
p2 = end_pos;
} else {
l1 = end;
p1 = end_pos;
l2 = start;
p2 = start_pos;
}
int endpoint = (int) l1.widths [p2];
if (p2 == l1.text.Length + 1) {
endpoint = (int) viewport_width;
}
#if Debug
Console.WriteLine("Invaliding backwards from {0}:{1} to {2}:{3} {4}",
l1.line_no, p1, l2.line_no, p2,
new Rectangle(
(int)l1.widths[p1] + l1.X - viewport_x,
l1.Y - viewport_y,
(int)l1.widths[p2],
l1.height
)
);
#endif
owner.Invalidate(new Rectangle (
(int)l1.widths[p1] + l1.X - viewport_x,
l1.Y - viewport_y,
endpoint - (int)l1.widths[p1] + 1,
l1.height));
return;
}
#if Debug
Console.WriteLine("Invaliding from {0}:{1} to {2}:{3} Start => x={4}, y={5}, {6}x{7}", l1.line_no, p1, l2.line_no, p2, (int)l1.widths[p1] + l1.X - viewport_x, l1.Y - viewport_y, viewport_width, l1.height);
Console.WriteLine ("invalidate start line: {0} position: {1}", l1.text, p1);
#endif
// Three invalidates:
// First line from start
owner.Invalidate(new Rectangle((int)l1.widths[p1] + l1.X - viewport_x, l1.Y - viewport_y, viewport_width, l1.height));
// lines inbetween
if ((l1.line_no + 1) < l2.line_no) {
int y;
y = GetLine(l1.line_no + 1).Y;
owner.Invalidate(new Rectangle(0, y - viewport_y, viewport_width, l2.Y - y));
#if Debug
Console.WriteLine("Invaliding from {0}:{1} to {2}:{3} Middle => x={4}, y={5}, {6}x{7}", l1.line_no, p1, l2.line_no, p2, 0, y - viewport_y, viewport_width, l2.Y - y);
#endif
}
// Last line to end
owner.Invalidate(new Rectangle((int)l2.widths[0] + l2.X - viewport_x, l2.Y - viewport_y, (int)l2.widths[p2] + 1, l2.height));
#if Debug
Console.WriteLine("Invaliding from {0}:{1} to {2}:{3} End => x={4}, y={5}, {6}x{7}", l1.line_no, p1, l2.line_no, p2, (int)l2.widths[0] + l2.X - viewport_x, l2.Y - viewport_y, (int)l2.widths[p2] + 1, l2.height);
#endif
}
/// Select text around caret
internal void ExpandSelection(CaretSelection mode, bool to_caret) {
if (to_caret) {
// We're expanding the selection to the caret position
switch(mode) {
case CaretSelection.Line: {
// Invalidate the selection delta
if (caret > selection_prev) {
Invalidate(selection_prev.line, 0, caret.line, caret.line.text.Length);
} else {
Invalidate(selection_prev.line, selection_prev.line.text.Length, caret.line, 0);
}
if (caret.line.line_no <= selection_anchor.line.line_no) {
selection_start.line = caret.line;
selection_start.tag = caret.line.tags;
selection_start.pos = 0;
selection_end.line = selection_anchor.line;
selection_end.tag = selection_anchor.tag;
selection_end.pos = selection_anchor.pos;
selection_end_anchor = true;
} else {
selection_start.line = selection_anchor.line;
selection_start.pos = selection_anchor.height;
selection_start.tag = selection_anchor.line.FindTag(selection_anchor.height);
selection_end.line = caret.line;
selection_end.tag = caret.line.tags;
selection_end.pos = caret.line.text.Length;
selection_end_anchor = false;
}
selection_prev.line = caret.line;
selection_prev.tag = caret.tag;
selection_prev.pos = caret.pos;
break;
}
case CaretSelection.Word: {
int start_pos;
int end_pos;
start_pos = FindWordSeparator(caret.line, caret.pos, false);
end_pos = FindWordSeparator(caret.line, caret.pos, true);
// Invalidate the selection delta
if (caret > selection_prev) {
Invalidate(selection_prev.line, selection_prev.pos, caret.line, end_pos);
} else {
Invalidate(selection_prev.line, selection_prev.pos, caret.line, start_pos);
}
if (caret < selection_anchor) {
selection_start.line = caret.line;
selection_start.tag = caret.line.FindTag(start_pos);
selection_start.pos = start_pos;
selection_end.line = selection_anchor.line;
selection_end.tag = selection_anchor.tag;
selection_end.pos = selection_anchor.pos;
selection_prev.line = caret.line;
selection_prev.tag = caret.tag;
selection_prev.pos = start_pos;
selection_end_anchor = true;
} else {
selection_start.line = selection_anchor.line;
selection_start.pos = selection_anchor.height;
selection_start.tag = selection_anchor.line.FindTag(selection_anchor.height);
selection_end.line = caret.line;
selection_end.tag = caret.line.FindTag(end_pos);
selection_end.pos = end_pos;
selection_prev.line = caret.line;
selection_prev.tag = caret.tag;
selection_prev.pos = end_pos;
selection_end_anchor = false;
}
break;
}
case CaretSelection.Position: {
SetSelectionToCaret(false);
return;
}
}
} else {
// We're setting the selection 'around' the caret position
switch(mode) {
case CaretSelection.Line: {
this.Invalidate(caret.line, 0, caret.line, caret.line.text.Length);
selection_start.line = caret.line;
selection_start.tag = caret.line.tags;
selection_start.pos = 0;
selection_end.line = caret.line;
selection_end.pos = caret.line.text.Length;
selection_end.tag = caret.line.FindTag(selection_end.pos);
selection_anchor.line = selection_end.line;
selection_anchor.tag = selection_end.tag;
selection_anchor.pos = selection_end.pos;
selection_anchor.height = 0;
selection_prev.line = caret.line;
selection_prev.tag = caret.tag;
selection_prev.pos = caret.pos;
this.selection_end_anchor = true;
break;
}
case CaretSelection.Word: {
int start_pos;
int end_pos;
start_pos = FindWordSeparator(caret.line, caret.pos, false);
end_pos = FindWordSeparator(caret.line, caret.pos, true);
this.Invalidate(selection_start.line, start_pos, caret.line, end_pos);
selection_start.line = caret.line;
selection_start.tag = caret.line.FindTag(start_pos);
selection_start.pos = start_pos;
selection_end.line = caret.line;
selection_end.tag = caret.line.FindTag(end_pos);
selection_end.pos = end_pos;
selection_anchor.line = selection_end.line;
selection_anchor.tag = selection_end.tag;
selection_anchor.pos = selection_end.pos;
selection_anchor.height = start_pos;
selection_prev.line = caret.line;
selection_prev.tag = caret.tag;
selection_prev.pos = caret.pos;
this.selection_end_anchor = true;
break;
}
}
}
SetSelectionVisible (!(selection_start == selection_end));
}
internal void SetSelectionToCaret(bool start) {
if (start) {
// Invalidate old selection; selection is being reset to empty
this.Invalidate(selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
selection_start.line = caret.line;
selection_start.tag = caret.tag;
selection_start.pos = caret.pos;
// start always also selects end
selection_end.line = caret.line;
selection_end.tag = caret.tag;
selection_end.pos = caret.pos;
selection_anchor.line = caret.line;
selection_anchor.tag = caret.tag;
selection_anchor.pos = caret.pos;
} else {
// Invalidate from previous end to caret (aka new end)
if (selection_end_anchor) {
if (selection_start != caret) {
this.Invalidate(selection_start.line, selection_start.pos, caret.line, caret.pos);
}
} else {
if (selection_end != caret) {
this.Invalidate(selection_end.line, selection_end.pos, caret.line, caret.pos);
}
}
if (caret < selection_anchor) {
selection_start.line = caret.line;
selection_start.tag = caret.tag;
selection_start.pos = caret.pos;
selection_end.line = selection_anchor.line;
selection_end.tag = selection_anchor.tag;
selection_end.pos = selection_anchor.pos;
selection_end_anchor = true;
} else {
selection_start.line = selection_anchor.line;
selection_start.tag = selection_anchor.tag;
selection_start.pos = selection_anchor.pos;
selection_end.line = caret.line;
selection_end.tag = caret.tag;
selection_end.pos = caret.pos;
selection_end_anchor = false;
}
}
SetSelectionVisible (!(selection_start == selection_end));
}
internal void SetSelection(Line start, int start_pos, Line end, int end_pos) {
if (selection_visible) {
Invalidate(selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
}
if ((end.line_no < start.line_no) || ((end == start) && (end_pos <= start_pos))) {
selection_start.line = end;
selection_start.tag = LineTag.FindTag(end, end_pos);
selection_start.pos = end_pos;
selection_end.line = start;
selection_end.tag = LineTag.FindTag(start, start_pos);
selection_end.pos = start_pos;
selection_end_anchor = true;
} else {
selection_start.line = start;
selection_start.tag = LineTag.FindTag(start, start_pos);
selection_start.pos = start_pos;
selection_end.line = end;
selection_end.tag = LineTag.FindTag(end, end_pos);
selection_end.pos = end_pos;
selection_end_anchor = false;
}
selection_anchor.line = start;
selection_anchor.tag = selection_start.tag;
selection_anchor.pos = start_pos;
if (((start == end) && (start_pos == end_pos)) || start == null || end == null) {
SetSelectionVisible (false);
} else {
SetSelectionVisible (true);
Invalidate(selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
}
}
internal void SetSelectionStart(Line start, int start_pos) {
// Invalidate from the previous to the new start pos
Invalidate(selection_start.line, selection_start.pos, start, start_pos);
selection_start.line = start;
selection_start.pos = start_pos;
selection_start.tag = LineTag.FindTag(start, start_pos);
selection_anchor.line = start;
selection_anchor.pos = start_pos;
selection_anchor.tag = selection_start.tag;
selection_end_anchor = false;
if ((selection_end.line != selection_start.line) || (selection_end.pos != selection_start.pos)) {
SetSelectionVisible (true);
} else {
SetSelectionVisible (false);
}
Invalidate(selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
}
internal void SetSelectionStart(int character_index) {
Line line;
LineTag tag;
int pos;
if (character_index < 0) {
return;
}
CharIndexToLineTag(character_index, out line, out tag, out pos);
SetSelectionStart(line, pos);
}
internal void SetSelectionEnd(Line end, int end_pos) {
if (end == selection_end.line && end_pos == selection_start.pos) {
selection_anchor.line = selection_start.line;
selection_anchor.tag = selection_start.tag;
selection_anchor.pos = selection_start.pos;
selection_end.line = selection_start.line;
selection_end.tag = selection_start.tag;
selection_end.pos = selection_start.pos;
selection_end_anchor = false;
} else if ((end.line_no < selection_anchor.line.line_no) || ((end == selection_anchor.line) && (end_pos <= selection_anchor.pos))) {
selection_start.line = end;
selection_start.tag = LineTag.FindTag(end, end_pos);
selection_start.pos = end_pos;
selection_end.line = selection_anchor.line;
selection_end.tag = selection_anchor.tag;
selection_end.pos = selection_anchor.pos;
selection_end_anchor = true;
} else {
selection_start.line = selection_anchor.line;
selection_start.tag = selection_anchor.tag;
selection_start.pos = selection_anchor.pos;
selection_end.line = end;
selection_end.tag = LineTag.FindTag(end, end_pos);
selection_end.pos = end_pos;
selection_end_anchor = false;
}
if ((selection_end.line != selection_start.line) || (selection_end.pos != selection_start.pos)) {
SetSelectionVisible (true);
Invalidate(selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
} else {
SetSelectionVisible (false);
// ?? Do I need to invalidate here, tests seem to work without it, but I don't think they should :-s
}
}
internal void SetSelectionEnd(int character_index) {
Line line;
LineTag tag;
int pos;
if (character_index < 0) {
return;
}
CharIndexToLineTag(character_index, out line, out tag, out pos);
SetSelectionEnd(line, pos);
}
internal void SetSelection(Line start, int start_pos) {
if (selection_visible) {
Invalidate(selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
}
selection_start.line = start;
selection_start.pos = start_pos;
selection_start.tag = LineTag.FindTag(start, start_pos);
selection_end.line = start;
selection_end.tag = selection_start.tag;
selection_end.pos = start_pos;
selection_anchor.line = start;
selection_anchor.tag = selection_start.tag;
selection_anchor.pos = start_pos;
selection_end_anchor = false;
SetSelectionVisible (false);
}
internal void InvalidateSelectionArea() {
Invalidate (selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
}
// Return the current selection, as string
internal string GetSelection() {
// We return String.Empty if there is no selection
if ((selection_start.pos == selection_end.pos) && (selection_start.line == selection_end.line)) {
return string.Empty;
}
if (selection_start.line == selection_end.line) {
return selection_start.line.text.ToString (selection_start.pos, selection_end.pos - selection_start.pos);
} else {
StringBuilder sb;
int i;
int start;
int end;
sb = new StringBuilder();
start = selection_start.line.line_no;
end = selection_end.line.line_no;
sb.Append(selection_start.line.text.ToString(selection_start.pos, selection_start.line.text.Length - selection_start.pos) + Environment.NewLine);
if ((start + 1) < end) {
for (i = start + 1; i < end; i++) {
sb.Append(GetLine(i).text.ToString() + Environment.NewLine);
}
}
sb.Append(selection_end.line.text.ToString(0, selection_end.pos));
return sb.ToString();
}
}
internal void ReplaceSelection(string s, bool select_new) {
int i;
int selection_pos_on_line = selection_start.pos;
int selection_start_pos = LineTagToCharIndex (selection_start.line, selection_start.pos);
SuspendRecalc ();
// First, delete any selected text
Console.WriteLine ("selection start: {0} selection end: {1}", selection_start, selection_end);
if ((selection_start.pos != selection_end.pos) || (selection_start.line != selection_end.line)) {
if (selection_start.line == selection_end.line) {
undo.RecordDeleteString (selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
DeleteChars(selection_start.tag, selection_start.pos, selection_end.pos - selection_start.pos);
// The tag might have been removed, we need to recalc it
selection_start.tag = selection_start.line.FindTag(selection_start.pos);
} else {
int start;
int end;
start = selection_start.line.line_no;
end = selection_end.line.line_no;
undo.RecordDeleteString (selection_start.line, selection_start.pos, selection_end.line, selection_end.pos);
// Delete first line
DeleteChars(selection_start.tag, selection_start.pos, selection_start.line.text.Length - selection_start.pos);
// Delete last line
DeleteChars(selection_end.line.tags, 0, selection_end.pos);
start++;
if (start < end) {
for (i = end - 1; i >= start; i--) {
Delete(i);
}
}
// BIG FAT WARNING - selection_end.line might be stale due
// to the above Delete() call. DONT USE IT before hitting the end of this method!
// Join start and end
Combine(selection_start.line.line_no, start);
}
}
Insert(selection_start.line, selection_start.pos, false, s);
undo.RecordInsertString (selection_start.line, selection_start.pos, s);
ResumeRecalc (false);
if (!select_new) {
CharIndexToLineTag(selection_start_pos + s.Length, out selection_start.line,
out selection_start.tag, out selection_start.pos);
selection_end.line = selection_start.line;
selection_end.pos = selection_start.pos;
selection_end.tag = selection_start.tag;
selection_anchor.line = selection_start.line;
selection_anchor.pos = selection_start.pos;
selection_anchor.tag = selection_start.tag;
SetSelectionVisible (false);
} else {
CharIndexToLineTag(selection_start_pos, out selection_start.line,
out selection_start.tag, out selection_start.pos);
CharIndexToLineTag(selection_start_pos + s.Length, out selection_end.line,
out selection_end.tag, out selection_end.pos);
selection_anchor.line = selection_start.line;
selection_anchor.pos = selection_start.pos;
selection_anchor.tag = selection_start.tag;
SetSelectionVisible (true);
}
PositionCaret (selection_start.line, selection_start.pos);
UpdateView (selection_start.line, selection_pos_on_line);
}
internal void CharIndexToLineTag(int index, out Line line_out, out LineTag tag_out, out int pos) {
Line line;
LineTag tag;
int i;
int chars;
int start;
chars = 0;
for (i = 1; i <= lines; i++) {
line = GetLine(i);
start = chars;
chars += line.text.Length + (line.soft_break ? 0 : crlf_size);
if (index <= chars) {
// we found the line
tag = line.tags;
while (tag != null) {
if (index < (start + tag.start + tag.length)) {
line_out = line;
tag_out = LineTag.GetFinalTag (tag);
pos = index - start;
return;
}
if (tag.next == null) {
Line next_line;
next_line = GetLine(line.line_no + 1);
if (next_line != null) {
line_out = next_line;
tag_out = LineTag.GetFinalTag (next_line.tags);
pos = 0;
return;
} else {
line_out = line;
tag_out = LineTag.GetFinalTag (tag);
pos = line_out.text.Length;
return;
}
}
tag = tag.next;
}
}
}
line_out = GetLine(lines);
tag = line_out.tags;
while (tag.next != null) {
tag = tag.next;
}
tag_out = tag;
pos = line_out.text.Length;
}
internal int LineTagToCharIndex(Line line, int pos) {
int i;
int length;
// Count first and last line
length = 0;
// Count the lines in the middle
for (i = 1; i < line.line_no; i++) {
length += GetLine(i).text.Length + (line.soft_break ? 0 : crlf_size);
}
length += pos;
return length;
}
internal int SelectionLength() {
if ((selection_start.pos == selection_end.pos) && (selection_start.line == selection_end.line)) {
return 0;
}
if (selection_start.line == selection_end.line) {
return selection_end.pos - selection_start.pos;
} else {
int i;
int start;
int end;
int length;
// Count first and last line
length = selection_start.line.text.Length - selection_start.pos + selection_end.pos + crlf_size;
// Count the lines in the middle
start = selection_start.line.line_no + 1;
end = selection_end.line.line_no;
if (start < end) {
for (i = start; i < end; i++) {
Line line = GetLine (i);
length += line.text.Length + (line.soft_break ? 0 : crlf_size);
}
}
return length;
}
}
/// Give it a Line number and it returns the Line object at with that line number
internal Line GetLine(int LineNo) {
Line line = document;
while (line != sentinel) {
if (LineNo == line.line_no) {
return line;
} else if (LineNo < line.line_no) {
line = line.left;
} else {
line = line.right;
}
}
return null;
}
/// Retrieve the previous tag; walks line boundaries
internal LineTag PreviousTag(LineTag tag) {
Line l;
if (tag.previous != null) {
return tag.previous;
}
// Next line
if (tag.line.line_no == 1) {
return null;
}
l = GetLine(tag.line.line_no - 1);
if (l != null) {
LineTag t;
t = l.tags;
while (t.next != null) {
t = t.next;
}
return t;
}
return null;
}
/// Retrieve the next tag; walks line boundaries
internal LineTag NextTag(LineTag tag) {
Line l;
if (tag.next != null) {
return tag.next;
}
// Next line
l = GetLine(tag.line.line_no + 1);
if (l != null) {
return l.tags;
}
return null;
}
internal Line ParagraphStart(Line line) {
while (line.soft_break) {
line = GetLine(line.line_no - 1);
}
return line;
}
internal Line ParagraphEnd(Line line) {
Line l;
while (line.soft_break) {
l = GetLine(line.line_no + 1);
if ((l == null) || (!l.soft_break)) {
break;
}
line = l;
}
return line;
}
/// Give it a pixel offset coordinate and it returns the Line covering that are (offset
/// is either X or Y depending on if we are multiline
///
internal Line GetLineByPixel (int offset, bool exact)
{
Line line = document;
Line last = null;
if (multiline) {
while (line != sentinel) {
last = line;
if ((offset >= line.Y) && (offset < (line.Y+line.height))) {
return line;
} else if (offset < line.Y) {
line = line.left;
} else {
line = line.right;
}
}
} else {
while (line != sentinel) {
last = line;
if ((offset >= line.X) && (offset < (line.X + line.Width)))
return line;
else if (offset < line.X)
line = line.left;
else
line = line.right;
}
}
if (exact) {
return null;
}
return last;
}
// Give it x/y pixel coordinates and it returns the Tag at that position; optionally the char position is returned in index
internal LineTag FindTag(int x, int y, out int index, bool exact) {
Line line;
LineTag tag;
line = GetLineByPixel(y, exact);
if (line == null) {
index = 0;
return null;
}
tag = line.tags;
// Alignment adjustment
x += line.X;
while (true) {
if (x >= tag.X && x < (tag.X+tag.width)) {
int end;
end = tag.start + tag.length - 1;
for (int pos = tag.start; pos < end; pos++) {
if (x < line.widths[pos]) {
index = pos;
return LineTag.GetFinalTag (tag);
}
}
index=end;
return LineTag.GetFinalTag (tag);
}
if (tag.next != null) {
tag = tag.next;
} else {
if (exact) {
index = 0;
return null;
}
index = line.text.Length;
return LineTag.GetFinalTag (tag);
}
}
}
// Give it x/y pixel coordinates and it returns the Tag at that position; optionally the char position is returned in index
internal LineTag FindCursor(int x, int y, out int index) {
Line line;
LineTag tag;
line = GetLineByPixel(multiline ? y : x, false);
tag = line.tags;
while (true) {
if (x >= tag.X && x < (tag.X+tag.width)) {
int end;
end = tag.end;
for (int pos = tag.start-1; pos < end; pos++) {
// When clicking on a character, we position the cursor to whatever edge
// of the character the click was closer
if (x < (line.X + line.widths[pos] + ((line.widths[pos+1]-line.widths[pos])/2))) {
index = pos;
return tag;
}
}
index=end;
return LineTag.GetFinalTag (tag);
}
if (tag.next != null) {
tag = tag.next;
} else {
index = line.text.Length;
return LineTag.GetFinalTag (tag);
}
}
}
/// Format area of document in specified font and color
/// 1-based start position on start_line
/// 1-based end position on end_line
internal void FormatText (Line start_line, int start_pos, Line end_line, int end_pos, Font font,
SolidBrush color, SolidBrush back_color, FormatSpecified specified)
{
Line l;
// First, format the first line
if (start_line != end_line) {
// First line
LineTag.FormatText(start_line, start_pos, start_line.text.Length - start_pos + 1, font, color, back_color, specified);
// Format last line
LineTag.FormatText(end_line, 1, end_pos, font, color, back_color, specified);
// Now all the lines inbetween
for (int i = start_line.line_no + 1; i < end_line.line_no; i++) {
l = GetLine(i);
LineTag.FormatText(l, 1, l.text.Length, font, color, back_color, specified);
}
} else {
// Special case, single line
LineTag.FormatText(start_line, start_pos, end_pos - start_pos, font, color, back_color, specified);
}
}
/// Re-format areas of the document in specified font and color
/// 1-based start position on start_line
/// 1-based end position on end_line
/// Font specifying attributes
/// Color (or NULL) to apply
/// Attributes from font and color to apply
internal void FormatText(Line start_line, int start_pos, Line end_line, int end_pos, FontDefinition attributes) {
Line l;
// First, format the first line
if (start_line != end_line) {
// First line
LineTag.FormatText(start_line, start_pos, start_line.text.Length - start_pos + 1, attributes);
// Format last line
LineTag.FormatText(end_line, 1, end_pos - 1, attributes);
// Now all the lines inbetween
for (int i = start_line.line_no + 1; i < end_line.line_no; i++) {
l = GetLine(i);
LineTag.FormatText(l, 1, l.text.Length, attributes);
}
} else {
// Special case, single line
LineTag.FormatText(start_line, start_pos, end_pos - start_pos, attributes);
}
}
internal void RecalculateAlignments ()
{
Line line;
int line_no;
line_no = 1;
while (line_no <= lines) {
line = GetLine(line_no);
if (line != null) {
switch (line.alignment) {
case HorizontalAlignment.Left:
line.align_shift = 0;
break;
case HorizontalAlignment.Center:
line.align_shift = (viewport_width - (int)line.widths[line.text.Length]) / 2;
break;
case HorizontalAlignment.Right:
line.align_shift = viewport_width - (int)line.widths[line.text.Length];
break;
}
}
line_no++;
}
return;
}
/// Calculate formatting for the whole document
internal bool RecalculateDocument(Graphics g) {
return RecalculateDocument(g, 1, this.lines, false);
}
/// Calculate formatting starting at a certain line
internal bool RecalculateDocument(Graphics g, int start) {
return RecalculateDocument(g, start, this.lines, false);
}
/// Calculate formatting within two given line numbers
internal bool RecalculateDocument(Graphics g, int start, int end) {
return RecalculateDocument(g, start, end, false);
}
/// With optimize on, returns true if line heights changed
internal bool RecalculateDocument(Graphics g, int start, int end, bool optimize) {
Line line;
int line_no;
int offset;
int new_width;
bool changed;
int shift;
if (recalc_suspended > 0) {
recalc_pending = true;
recalc_start = Math.Min (recalc_start, start);
recalc_end = Math.Max (recalc_end, end);
recalc_optimize = optimize;
return false;
}
// Fixup the positions, they can go kinda nuts
start = Math.Max (start, 1);
end = Math.Min (end, lines);
offset = GetLine(start).offset;
line_no = start;
new_width = 0;
shift = this.lines;
if (!optimize) {
changed = true; // We always return true if we run non-optimized
} else {
changed = false;
}
while (line_no <= (end + this.lines - shift)) {
line = GetLine(line_no++);
line.offset = offset;
if (!calc_pass) {
if (!optimize) {
line.RecalculateLine(g, this);
} else {
if (line.recalc && line.RecalculateLine(g, this)) {
changed = true;
// If the height changed, all subsequent lines change
end = this.lines;
shift = this.lines;
}
}
} else {
if (!optimize) {
line.RecalculatePasswordLine(g, this);
} else {
if (line.recalc && line.RecalculatePasswordLine(g, this)) {
changed = true;
// If the height changed, all subsequent lines change
end = this.lines;
shift = this.lines;
}
}
}
if (line.widths[line.text.Length] > new_width) {
new_width = (int)line.widths[line.text.Length];
}
// Calculate alignment
if (line.alignment != HorizontalAlignment.Left) {
if (line.alignment == HorizontalAlignment.Center) {
line.align_shift = (viewport_width - (int)line.widths[line.text.Length]) / 2;
} else {
line.align_shift = viewport_width - (int)line.widths[line.text.Length] - 1;
}
}
if (multiline)
offset += line.height;
else
offset += (int) line.widths [line.text.Length] + 2;
if (line_no > lines) {
break;
}
}
if (document_x != new_width) {
document_x = new_width;
if (WidthChanged != null) {
WidthChanged(this, null);
}
}
RecalculateAlignments();
line = GetLine(lines);
if (document_y != line.Y + line.height) {
document_y = line.Y + line.height;
if (HeightChanged != null) {
HeightChanged(this, null);
}
}
UpdateCaret();
return changed;
}
internal int Size() {
return lines;
}
private void owner_HandleCreated(object sender, EventArgs e) {
RecalculateDocument(owner.CreateGraphicsInternal());
AlignCaret();
}
private void owner_VisibleChanged(object sender, EventArgs e) {
if (owner.Visible) {
RecalculateDocument(owner.CreateGraphicsInternal());
}
}
internal static bool IsWordSeparator(char ch) {
switch(ch) {
case ' ':
case '\t':
case '(':
case ')': {
return true;
}
default: {
return false;
}
}
}
internal int FindWordSeparator(Line line, int pos, bool forward) {
int len;
len = line.text.Length;
if (forward) {
for (int i = pos + 1; i < len; i++) {
if (IsWordSeparator(line.Text[i])) {
return i + 1;
}
}
return len;
} else {
for (int i = pos - 1; i > 0; i--) {
if (IsWordSeparator(line.Text[i - 1])) {
return i;
}
}
return 0;
}
}
/* Search document for text */
internal bool FindChars(char[] chars, Marker start, Marker end, out Marker result) {
Line line;
int line_no;
int pos;
int line_len;
// Search for occurence of any char in the chars array
result = new Marker();
line = start.line;
line_no = start.line.line_no;
pos = start.pos;
while (line_no <= end.line.line_no) {
line_len = line.text.Length;
while (pos < line_len) {
for (int i = 0; i < chars.Length; i++) {
if (line.text[pos] == chars[i]) {
// Special case
if ((line.line_no == end.line.line_no) && (pos >= end.pos)) {
return false;
}
result.line = line;
result.pos = pos;
return true;
}
}
pos++;
}
pos = 0;
line_no++;
line = GetLine(line_no);
}
return false;
}
// This version does not build one big string for searching, instead it handles
// line-boundaries, which is faster and less memory intensive
// FIXME - Depending on culture stuff we might have to create a big string and use culturespecific
// search stuff and change it to accept and return positions instead of Markers (which would match
// RichTextBox behaviour better but would be inconsistent with the rest of TextControl)
internal bool Find(string search, Marker start, Marker end, out Marker result, RichTextBoxFinds options) {
Marker last;
string search_string;
Line line;
int line_no;
int pos;
int line_len;
int current;
bool word;
bool word_option;
bool ignore_case;
bool reverse;
char c;
result = new Marker();
word_option = ((options & RichTextBoxFinds.WholeWord) != 0);
ignore_case = ((options & RichTextBoxFinds.MatchCase) == 0);
reverse = ((options & RichTextBoxFinds.Reverse) != 0);
line = start.line;
line_no = start.line.line_no;
pos = start.pos;
current = 0;
// Prep our search string, lowercasing it if we do case-independent matching
if (ignore_case) {
StringBuilder sb;
sb = new StringBuilder(search);
for (int i = 0; i < sb.Length; i++) {
sb[i] = Char.ToLower(sb[i]);
}
search_string = sb.ToString();
} else {
search_string = search;
}
// We need to check if the character before our start position is a wordbreak
if (word_option) {
if (line_no == 1) {
if ((pos == 0) || (IsWordSeparator(line.text[pos - 1]))) {
word = true;
} else {
word = false;
}
} else {
if (pos > 0) {
if (IsWordSeparator(line.text[pos - 1])) {
word = true;
} else {
word = false;
}
} else {
// Need to check the end of the previous line
Line prev_line;
prev_line = GetLine(line_no - 1);
if (prev_line.soft_break) {
if (IsWordSeparator(prev_line.text[prev_line.text.Length - 1])) {
word = true;
} else {
word = false;
}
} else {
word = true;
}
}
}
} else {
word = false;
}
// To avoid duplication of this loop with reverse logic, we search
// through the document, remembering the last match and when returning
// report that last remembered match
last = new Marker();
last.height = -1; // Abused - we use it to track change
while (line_no <= end.line.line_no) {
if (line_no != end.line.line_no) {
line_len = line.text.Length;
} else {
line_len = end.pos;
}
while (pos < line_len) {
if (word_option && (current == search_string.Length)) {
if (IsWordSeparator(line.text[pos])) {
if (!reverse) {
goto FindFound;
} else {
last = result;
current = 0;
}
} else {
current = 0;
}
}
if (ignore_case) {
c = Char.ToLower(line.text[pos]);
} else {
c = line.text[pos];
}
if (c == search_string[current]) {
if (current == 0) {
result.line = line;
result.pos = pos;
}
if (!word_option || (word_option && (word || (current > 0)))) {
current++;
}
if (!word_option && (current == search_string.Length)) {
if (!reverse) {
goto FindFound;
} else {
last = result;
current = 0;
}
}
} else {
current = 0;
}
pos++;
if (!word_option) {
continue;
}
if (IsWordSeparator(c)) {
word = true;
} else {
word = false;
}
}
if (word_option) {
// Mark that we just saw a word boundary
if (!line.soft_break) {
word = true;
}
if (current == search_string.Length) {
if (word) {
if (!reverse) {
goto FindFound;
} else {
last = result;
current = 0;
}
} else {
current = 0;
}
}
}
pos = 0;
line_no++;
line = GetLine(line_no);
}
if (reverse) {
if (last.height != -1) {
result = last;
return true;
}
}
return false;
FindFound:
if (!reverse) {
// if ((line.line_no == end.line.line_no) && (pos >= end.pos)) {
// return false;
// }
return true;
}
result = last;
return true;
}
/* Marker stuff */
internal void GetMarker(out Marker mark, bool start) {
mark = new Marker();
if (start) {
mark.line = GetLine(1);
mark.tag = mark.line.tags;
mark.pos = 0;
} else {
mark.line = GetLine(lines);
mark.tag = mark.line.tags;
while (mark.tag.next != null) {
mark.tag = mark.tag.next;
}
mark.pos = mark.line.text.Length;
}
}
#endregion // Internal Methods
#region Events
internal event EventHandler CaretMoved;
internal event EventHandler WidthChanged;
internal event EventHandler HeightChanged;
internal event EventHandler LengthChanged;
#endregion // Events
#region Administrative
public IEnumerator GetEnumerator() {
// FIXME
return null;
}
public override bool Equals(object obj) {
if (obj == null) {
return false;
}
if (!(obj is Document)) {
return false;
}
if (obj == this) {
return true;
}
if (ToString().Equals(((Document)obj).ToString())) {
return true;
}
return false;
}
public override int GetHashCode() {
return document_id;
}
public override string ToString() {
return "document " + this.document_id;
}
#endregion // Administrative
}
internal class ImageTag : LineTag {
internal Image image;
internal ImageTag (Line line, int start, Image image) : base (line, start)
{
this.image = image;
}
internal override SizeF SizeOfPosition (Graphics dc, int pos)
{
return image.Size;
}
internal override int MaxHeight ()
{
return image.Height;
}
internal override void Draw (Graphics dc, Brush brush, float x, float y, int start, int end)
{
dc.DrawImage (image, x, y);
}
}
internal class LineTag {
#region Local Variables;
// Payload; formatting
internal Font font; // System.Drawing.Font object for this tag
internal SolidBrush color; // The font color for this tag
// In 2.0 tags can have background colours. I'm not going to #ifdef
// at this level though since I want to reduce code paths
internal SolidBrush back_color;
// Payload; text
internal int start; // start, in chars; index into Line.text
internal bool r_to_l; // Which way is the font
// Drawing support
internal int height; // Height in pixels of the text this tag describes
internal int ascent; // Ascent of the font for this tag
internal int shift; // Shift down for this tag, to stay on baseline
// Administrative
internal Line line; // The line we're on
internal LineTag next; // Next tag on the same line
internal LineTag previous; // Previous tag on the same line
#endregion;
#region Constructors
internal LineTag(Line line, int start) {
this.line = line;
this.start = start;
}
#endregion // Constructors
#region Internal Methods
public float X {
get {
if (start == 0)
return line.X + line.indent;
return line.X + line.widths [start - 1];
}
}
public int end {
get { return start + length; }
}
public float width {
get {
if (length == 0)
return 0;
return line.widths [start + length - 1] - line.widths [start - 1];
}
}
public int length {
get {
int res = 0;
if (next != null)
res = next.start - start;
else
res = line.text.Length - (start - 1);
return res > 0 ? res : 0;
}
}
internal virtual SizeF SizeOfPosition (Graphics dc, int pos)
{
return dc.MeasureString (line.text.ToString (pos, 1), font, 10000, Document.string_format);
}
internal virtual int MaxHeight ()
{
return font.Height;
}
internal virtual void Draw (Graphics dc, Brush brush, float x, float y, int start, int end)
{
dc.DrawString (line.text.ToString (start, end), font, brush, x, y, StringFormat.GenericTypographic);
}
internal virtual void Draw (Graphics dc, Brush brush, float x, float y, int start, int end, string text) {
dc.DrawString (text.Substring (start, end), font, brush, x, y, StringFormat.GenericTypographic);
}
///Break a tag into two with identical attributes; pos is 1-based; returns tag starting at >pos< or null if end-of-line
internal LineTag Break(int pos) {
LineTag new_tag;
// Sanity
if (pos == this.start) {
return this;
} else if (pos >= (start + length)) {
return null;
}
new_tag = new LineTag(line, pos);
new_tag.CopyFormattingFrom (this);
new_tag.next = this.next;
this.next = new_tag;
new_tag.previous = this;
if (new_tag.next != null) {
new_tag.next.previous = new_tag;
}
return new_tag;
}
public string Text ()
{
return line.text.ToString (start - 1, length);
}
public void CopyFormattingFrom (LineTag other)
{
height = other.height;
font = other.font;
color = other.color;
back_color = other.back_color;
}
///Create new font and brush from existing font and given new attributes. Returns true if fontheight changes
internal static bool GenerateTextFormat(Font font_from, SolidBrush color_from, FontDefinition attributes, out Font new_font, out SolidBrush new_color) {
float size;
string face;
FontStyle style;
GraphicsUnit unit;
if (attributes.font_obj == null) {
size = font_from.SizeInPoints;
unit = font_from.Unit;
face = font_from.Name;
style = font_from.Style;
if (attributes.face != null) {
face = attributes.face;
}
if (attributes.size != 0) {
size = attributes.size;
}
style |= attributes.add_style;
style &= ~attributes.remove_style;
// Create new font
new_font = new Font(face, size, style, unit);
} else {
new_font = attributes.font_obj;
}
// Create 'new' color brush
if (attributes.color != Color.Empty) {
new_color = new SolidBrush(attributes.color);
} else {
new_color = color_from;
}
if (new_font.Height == font_from.Height) {
return false;
}
return true;
}
/// Applies 'font' and 'brush' to characters starting at 'start' for 'length' chars;
/// Removes any previous tags overlapping the same area;
/// returns true if lineheight has changed
/// 1-based character position on line
internal static bool FormatText(Line line, int start, int length, Font font, SolidBrush color, SolidBrush back_color, FormatSpecified specified)
{
LineTag tag;
LineTag start_tag;
LineTag end_tag;
int end;
bool retval = false; // Assume line-height doesn't change
// Too simple?
if (((FormatSpecified.Font & specified) == FormatSpecified.Font) && font.Height != line.height) {
retval = true;
}
line.recalc = true; // This forces recalculation of the line in RecalculateDocument
// A little sanity, not sure if it's needed, might be able to remove for speed
if (length > line.text.Length) {
length = line.text.Length;
}
tag = line.tags;
end = start + length;
// Common special case
if ((start == 1) && (length == tag.length)) {
tag.ascent = 0;
SetFormat (tag, font, color, back_color, specified);
return retval;
}
start_tag = FindTag (line, start);
tag = start_tag.Break (start);
while (tag != null && tag.end <= end) {
SetFormat (tag, font, color, back_color, specified);
tag = tag.next;
}
if (end != line.text.Length) {
/// Now do the last tag
end_tag = FindTag (line, end);
if (end_tag != null) {
end_tag.Break (end);
SetFormat (end_tag, font, color, back_color, specified);
}
}
return retval;
}
private static void SetFormat (LineTag tag, Font font, SolidBrush color, SolidBrush back_color, FormatSpecified specified)
{
if ((FormatSpecified.Font & specified) == FormatSpecified.Font)
tag.font = font;
if ((FormatSpecified.Color & specified) == FormatSpecified.Color)
tag.color = color;
if ((FormatSpecified.BackColor & specified) == FormatSpecified.BackColor) {
tag.back_color = back_color;
}
// Console.WriteLine ("setting format: {0} {1} new color {2}", color.Color, specified, tag.color.Color);
}
/// Applies font attributes specified to characters starting at 'start' for 'length' chars;
/// Breaks tags at start and end point, keeping middle tags with altered attributes.
/// Returns true if lineheight has changed
/// 1-based character position on line
internal static bool FormatText(Line line, int start, int length, FontDefinition attributes) {
LineTag tag;
LineTag start_tag;
LineTag end_tag;
bool retval = false; // Assume line-height doesn't change
line.recalc = true; // This forces recalculation of the line in RecalculateDocument
// A little sanity, not sure if it's needed, might be able to remove for speed
if (length > line.text.Length) {
length = line.text.Length;
}
tag = line.tags;
// Common special case
if ((start == 1) && (length == tag.length)) {
tag.ascent = 0;
GenerateTextFormat(tag.font, tag.color, attributes, out tag.font, out tag.color);
return retval;
}
start_tag = FindTag(line, start);
if (start_tag == null) {
if (length == 0) {
// We are 'starting' after all valid tags; create a new tag with the right attributes
start_tag = FindTag(line, line.text.Length - 1);
start_tag.next = new LineTag(line, line.text.Length + 1);
start_tag.next.CopyFormattingFrom (start_tag);
start_tag.next.previous = start_tag;
start_tag = start_tag.next;
} else {
throw new Exception(String.Format("Could not find start_tag in document at line {0} position {1}", line.line_no, start));
}
} else {
start_tag = start_tag.Break(start);
}
end_tag = FindTag(line, start + length);
if (end_tag != null) {
end_tag = end_tag.Break(start + length);
}
// start_tag or end_tag might be null; we're cool with that
// we now walk from start_tag to end_tag, applying new attributes
tag = start_tag;
while ((tag != null) && tag != end_tag) {
if (LineTag.GenerateTextFormat(tag.font, tag.color, attributes, out tag.font, out tag.color)) {
retval = true;
}
tag = tag.next;
}
return retval;
}
/// Finds the tag that describes the character at position 'pos' on 'line'
internal static LineTag FindTag(Line line, int pos) {
LineTag tag = line.tags;
// Beginning of line is a bit special
if (pos == 0) {
// Not sure if we should get the final tag here
return tag;
}
while (tag != null) {
if ((tag.start <= pos) && (pos <= tag.end)) {
return GetFinalTag (tag);
}
tag = tag.next;
}
return null;
}
// There can be multiple tags at the same position, we want to make
// sure we are using the very last tag at the given position
internal static LineTag GetFinalTag (LineTag tag)
{
LineTag res = tag;
while (res.next != null && res.next.length == 0)
res = res.next;
return res;
}
/// Combines 'this' tag with 'other' tag
internal bool Combine(LineTag other) {
if (!this.Equals(other)) {
return false;
}
this.next = other.next;
if (this.next != null) {
this.next.previous = this;
}
return true;
}
/// Remove 'this' tag ; to be called when formatting is to be removed
internal bool Remove() {
if ((this.start == 1) && (this.next == null)) {
// We cannot remove the only tag
return false;
}
if (this.start != 1) {
this.previous.next = this.next;
this.next.previous = this.previous;
} else {
this.next.start = 1;
this.line.tags = this.next;
this.next.previous = null;
}
return true;
}
/// Checks if 'this' tag describes the same formatting options as 'obj'
public override bool Equals(object obj) {
LineTag other;
if (obj == null) {
return false;
}
if (!(obj is LineTag)) {
return false;
}
if (obj == this) {
return true;
}
other = (LineTag)obj;
if (this.font.Equals(other.font) && this.color.Equals(other.color)) { // FIXME add checking for things like link or type later
return true;
}
return false;
}
public override int GetHashCode() {
return base.GetHashCode ();
}
public override string ToString() {
if (length > 0)
return "Tag starts at index " + this.start + " length " + this.length + " text: " + Text () + "Font " + this.font.ToString();
return "Zero Lengthed tag at index " + this.start;
}
#endregion // Internal Methods
}
internal class UndoManager {
internal enum ActionType {
Typing,
// This is basically just cut & paste
InsertString,
DeleteString,
UserActionBegin,
UserActionEnd
}
internal class Action {
internal ActionType type;
internal int line_no;
internal int pos;
internal object data;
}
#region Local Variables
private Document document;
private Stack undo_actions;
private Stack redo_actions;
private int caret_line;
private int caret_pos;
// When performing an action, we lock the queue, so that the action can't be undone
private bool locked;
#endregion // Local Variables
#region Constructors
internal UndoManager (Document document)
{
this.document = document;
undo_actions = new Stack (50);
redo_actions = new Stack (50);
}
#endregion // Constructors
#region Properties
internal bool CanUndo {
get { return undo_actions.Count > 0; }
}
internal bool CanRedo {
get { return redo_actions.Count > 0; }
}
internal string UndoActionName {
get {
foreach (Action action in undo_actions) {
if (action.type == ActionType.UserActionBegin)
return (string) action.data;
if (action.type == ActionType.Typing)
return Locale.GetText ("Typing");
}
return String.Empty;
}
}
internal string RedoActionName {
get {
foreach (Action action in redo_actions) {
if (action.type == ActionType.UserActionBegin)
return (string) action.data;
if (action.type == ActionType.Typing)
return Locale.GetText ("Typing");
}
return String.Empty;
}
}
#endregion // Properties
#region Internal Methods
internal void Clear ()
{
undo_actions.Clear();
redo_actions.Clear();
}
internal void Undo ()
{
Action action;
bool user_action_finished = false;
if (undo_actions.Count == 0)
return;
// Nuke the redo queue
redo_actions.Clear ();
locked = true;
do {
Line start;
action = (Action) undo_actions.Pop ();
// Put onto redo stack
redo_actions.Push(action);
// Do the thing
switch(action.type) {
case ActionType.UserActionBegin:
user_action_finished = true;
break;
case ActionType.UserActionEnd:
// noop
break;
case ActionType.InsertString:
start = document.GetLine (action.line_no);
document.SuspendUpdate ();
document.DeleteMultiline (start, action.pos, ((string) action.data).Length + 1);
document.PositionCaret (start, action.pos);
document.SetSelectionToCaret (true);
document.ResumeUpdate (true);
break;
case ActionType.Typing:
start = document.GetLine (action.line_no);
document.SuspendUpdate ();
document.DeleteMultiline (start, action.pos, ((StringBuilder) action.data).Length);
document.PositionCaret (start, action.pos);
document.SetSelectionToCaret (true);
document.ResumeUpdate (true);
// This is an open ended operation, so only a single typing operation can be undone at once
user_action_finished = true;
break;
case ActionType.DeleteString:
start = document.GetLine (action.line_no);
document.SuspendUpdate ();
Insert (start, action.pos, (Line) action.data, true);
document.ResumeUpdate (true);
break;
}
} while (!user_action_finished && undo_actions.Count > 0);
locked = false;
}
internal void Redo ()
{
Action action;
bool user_action_finished = false;
if (redo_actions.Count == 0)
return;
// You can't undo anything after redoing
undo_actions.Clear ();
locked = true;
do {
Line start;
int start_index;
action = (Action) redo_actions.Pop ();
switch (action.type) {
case ActionType.UserActionBegin:
// Noop
break;
case ActionType.UserActionEnd:
user_action_finished = true;
break;
case ActionType.InsertString:
start = document.GetLine (action.line_no);
document.SuspendUpdate ();
start_index = document.LineTagToCharIndex (start, action.pos);
document.InsertString (start, action.pos, (string) action.data);
document.CharIndexToLineTag (start_index + ((string) action.data).Length,
out document.caret.line, out document.caret.tag,
out document.caret.pos);
document.UpdateCaret ();
document.SetSelectionToCaret (true);
document.ResumeUpdate (true);
break;
case ActionType.Typing:
start = document.GetLine (action.line_no);
document.SuspendUpdate ();
start_index = document.LineTagToCharIndex (start, action.pos);
document.InsertString (start, action.pos, ((StringBuilder) action.data).ToString ());
document.CharIndexToLineTag (start_index + ((StringBuilder) action.data).Length,
out document.caret.line, out document.caret.tag,
out document.caret.pos);
document.UpdateCaret ();
document.SetSelectionToCaret (true);
document.ResumeUpdate (true);
// This is an open ended operation, so only a single typing operation can be undone at once
user_action_finished = true;
break;
case ActionType.DeleteString:
start = document.GetLine (action.line_no);
document.SuspendUpdate ();
document.DeleteMultiline (start, action.pos, ((Line) action.data).text.Length);
document.PositionCaret (start, action.pos);
document.SetSelectionToCaret (true);
document.ResumeUpdate (true);
break;
}
} while (!user_action_finished && redo_actions.Count > 0);
locked = false;
}
#endregion // Internal Methods
#region Private Methods
public void BeginUserAction (string name)
{
if (locked)
return;
Action ua = new Action ();
ua.type = ActionType.UserActionBegin;
ua.data = name;
undo_actions.Push (ua);
}
public void EndUserAction ()
{
if (locked)
return;
Action ua = new Action ();
ua.type = ActionType.UserActionEnd;
undo_actions.Push (ua);
}
// start_pos, end_pos = 1 based
public void RecordDeleteString (Line start_line, int start_pos, Line end_line, int end_pos)
{
if (locked)
return;
Action a = new Action ();
// We cant simply store the string, because then formatting would be lost
a.type = ActionType.DeleteString;
a.line_no = start_line.line_no;
a.pos = start_pos;
a.data = Duplicate (start_line, start_pos, end_line, end_pos);
undo_actions.Push(a);
}
public void RecordInsertString (Line line, int pos, string str)
{
if (locked || str.Length == 0)
return;
Action a = new Action ();
a.type = ActionType.InsertString;
a.data = str;
a.line_no = line.line_no;
a.pos = pos;
undo_actions.Push (a);
}
public void RecordTyping (Line line, int pos, char ch)
{
if (locked)
return;
Action a = null;
if (undo_actions.Count > 0)
a = (Action) undo_actions.Peek ();
if (a == null || a.type != ActionType.Typing) {
a = new Action ();
a.type = ActionType.Typing;
a.data = new StringBuilder ();
a.line_no = line.line_no;
a.pos = pos;
undo_actions.Push (a);
}
StringBuilder data = (StringBuilder) a.data;
data.Append (ch);
}
// start_pos = 1-based
// end_pos = 1-based
public Line Duplicate(Line start_line, int start_pos, Line end_line, int end_pos)
{
Line ret;
Line line;
Line current;
LineTag tag;
LineTag current_tag;
int start;
int end;
int tag_start;
line = new Line (start_line.document);
ret = line;
for (int i = start_line.line_no; i <= end_line.line_no; i++) {
current = document.GetLine(i);
if (start_line.line_no == i) {
start = start_pos;
} else {
start = 1;
}
if (end_line.line_no == i) {
end = end_pos;
} else {
end = current.text.Length;
}
if (end_pos == 0)
continue;
// Text for the tag
line.text = new StringBuilder (current.text.ToString (start, end - start));
// Copy tags from start to start+length onto new line
current_tag = current.FindTag (start);
while ((current_tag != null) && (current_tag.start < end)) {
if ((current_tag.start <= start) && (start < (current_tag.start + current_tag.length))) {
// start tag is within this tag
tag_start = start;
} else {
tag_start = current_tag.start;
}
tag = new LineTag(line, tag_start - start + 1);
tag.CopyFormattingFrom (current_tag);
current_tag = current_tag.next;
// Add the new tag to the line
if (line.tags == null) {
line.tags = tag;
} else {
LineTag tail;
tail = line.tags;
while (tail.next != null) {
tail = tail.next;
}
tail.next = tag;
tag.previous = tail;
}
}
if ((i + 1) <= end_line.line_no) {
line.soft_break = current.soft_break;
// Chain them (we use right/left as next/previous)
line.right = new Line (start_line.document);
line.right.left = line;
line = line.right;
}
}
return ret;
}
// Insert multi-line text at the given position; use formatting at insertion point for inserted text
internal void Insert(Line line, int pos, Line insert, bool select)
{
Line current;
LineTag tag;
int offset;
int lines;
Line first;
// Handle special case first
if (insert.right == null) {
// Single line insert
document.Split(line, pos);
if (insert.tags == null) {
return; // Blank line
}
//Insert our tags at the end
tag = line.tags;
while (tag.next != null) {
tag = tag.next;
}
offset = tag.start + tag.length - 1;
tag.next = insert.tags;
line.text.Insert(offset, insert.text.ToString());
// Adjust start locations
tag = tag.next;
while (tag != null) {
tag.start += offset;
tag.line = line;
tag = tag.next;
}
// Put it back together
document.Combine(line.line_no, line.line_no + 1);
if (select) {
document.SetSelectionStart (line, pos);
document.SetSelectionEnd (line, pos + insert.text.Length);
}
document.UpdateView(line, pos);
return;
}
first = line;
lines = 1;
current = insert;
while (current != null) {
if (current == insert) {
// Inserting the first line we split the line (and make space)
document.Split(line, pos);
//Insert our tags at the end of the line
tag = line.tags;
if (tag != null) {
while (tag.next != null) {
tag = tag.next;
}
offset = tag.start + tag.length - 1;
tag.next = current.tags;
tag.next.previous = tag;
tag = tag.next;
} else {
offset = 0;
line.tags = current.tags;
line.tags.previous = null;
tag = line.tags;
}
} else {
document.Split(line.line_no, 0);
offset = 0;
line.tags = current.tags;
line.tags.previous = null;
tag = line.tags;
}
// Adjust start locations and line pointers
while (tag != null) {
tag.start += offset;
tag.line = line;
tag = tag.next;
}
line.text.Insert(offset, current.text.ToString());
line.Grow(line.text.Length);
line.recalc = true;
line = document.GetLine(line.line_no + 1);
// FIXME? Test undo of line-boundaries
if ((current.right == null) && (current.tags.length != 0)) {
document.Combine(line.line_no - 1, line.line_no);
}
current = current.right;
lines++;
}
// Recalculate our document
document.UpdateView(first, lines, pos);
return;
}
#endregion // Private Methods
}
}