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TextTool.cs
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/////////////////////////////////////////////////////////////////////////////////
// Paint.NET //
// Copyright (C) dotPDN LLC, Rick Brewster, Tom Jackson, and contributors. //
// Portions Copyright (C) Microsoft Corporation. All Rights Reserved. //
// See license-pdn.txt for full licensing and attribution details. //
// //
// Ported to Pinta by: Olivier Dufour <[email protected]> //
// Jonathan Pobst <[email protected]> //
/////////////////////////////////////////////////////////////////////////////////
using System;
using System.Collections.Generic;
using System.Text;
using Gdk;
using Gtk;
using Pinta.Core;
namespace Pinta.Tools
{
public class TextTool : BaseTool
{
// Variables for dragging
private Cairo.PointD startMouseXY;
private Point startClickPoint;
private bool tracking;
private Gdk.Cursor cursor_hand;
private Point clickPoint;
private bool is_editing;
private Rectangle old_cursor_bounds = Rectangle.Zero;
//This is used to temporarily store the UserLayer's and TextLayer's previous ImageSurface states.
private Cairo.ImageSurface? text_undo_surface;
private Cairo.ImageSurface? user_undo_surface;
private TextEngine? undo_engine;
// The selection from when editing started. This ensures that text doesn't suddenly disappear/appear
// if the selection changes before the text is finalized.
private DocumentSelection? selection;
private Gtk.IMMulticontext imContext;
private Pinta.Core.TextLayout layout;
private Rectangle CurrentTextBounds
{
get
{
return PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.textBounds;
}
set
{
PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.previousTextBounds = PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.textBounds;
PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.textBounds = value;
}
}
private TextEngine CurrentTextEngine
{
get
{
if (!PintaCore.Workspace.HasOpenDocuments)
throw new InvalidOperationException ("Attempting to get CurrentTextEngine when there are no open documents");
return PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.tEngine;
}
}
private Pinta.Core.TextLayout CurrentTextLayout
{
get {
if (layout.Engine != CurrentTextEngine)
layout.Engine = CurrentTextEngine;
return layout;
}
}
//While this is true, text will not be finalized upon Surface.Clone calls.
private bool ignoreCloneFinalizations = false;
//Whether or not either (or both) of the Ctrl keys are pressed.
private bool ctrlKey = false;
//Store the most recent mouse position.
private Point lastMousePosition = new Point(0, 0);
//Whether or not the previous TextTool mouse cursor shown was the normal one.
private bool previousMouseCursorNormal = true;
public override string Name { get { return Translations.GetString ("Text"); } }
private string FinalizeName { get { return Translations.GetString("Text - Finalize"); } }
public override string Icon { get { return Pinta.Resources.Icons.ToolText; } }
public override Gdk.Key ShortcutKey { get { return Gdk.Key.T; } }
public override int Priority { get { return 35; } }
public override string StatusBarText {
get { return Translations.GetString ("Left click to place cursor, then type desired text. Text color is primary color."); }
}
public override Gdk.Cursor DefaultCursor {
get {
return new Gdk.Cursor (Gdk.Display.Default,
PintaCore.Resources.GetIcon ("Cursor.Text.png"),
16, 16);
}
}
public Gdk.Cursor InvalidEditCursor { get { return new Gdk.Cursor (Gdk.Display.Default, IconTheme.Default.LoadIcon(Pinta.Resources.Icons.EditSelectionErase, 16), 8, 0); } }
#region Constructor
public TextTool (IServiceManager services) : base (services)
{
cursor_hand = new Gdk.Cursor (Gdk.Display.Default, PintaCore.Resources.GetIcon ("Cursor.Pan.png"), 8, 8);
imContext = new Gtk.IMMulticontext ();
imContext.Commit += OnIMCommit;
layout = new Pinta.Core.TextLayout ();
}
#endregion
#region ToolBar
// NRT - Created by OnBuildToolBar
private ToolBarLabel font_label = null!;
private ToolBarWidget<FontButton> font_button = null!;
private ToolBarToggleButton bold_btn = null!;
private ToolBarToggleButton italic_btn = null!;
private ToolBarToggleButton underscore_btn = null!;
private ToolBarToggleButton left_alignment_btn = null!;
private ToolBarToggleButton center_alignment_btn = null!;
private ToolBarToggleButton Right_alignment_btn = null!;
private ToolBarLabel fill_label = null!;
private ToolBarDropDownButton fill_button = null!;
private SeparatorToolItem fill_sep = null!;
private SeparatorToolItem outline_sep = null!;
private ToolBarWidget<SpinButton> outline_width = null!;
private ToolBarLabel outline_width_label = null!;
private const string FONT_SETTING = "text-font";
private const string BOLD_SETTING = "text-bold";
private const string ITALIC_SETTING = "text-italic";
private const string UNDERLINE_SETTING = "text-underline";
private const string ALIGNMENT_SETTING = "text-alignment";
private const string STYLE_SETTING = "text-style";
private const string OUTLINE_WIDTH_SETTING = "text-outline-width";
protected override void OnBuildToolBar (Gtk.Toolbar tb)
{
base.OnBuildToolBar (tb);
if (font_label == null)
font_label = new ToolBarLabel (string.Format (" {0}: ", Translations.GetString ("Font")));
tb.AppendItem (font_label);
if (font_button == null) {
font_button = new (new FontButton () { ShowStyle = true, ShowSize = true, UseFont = true });
// Default to Arial if possible.
font_button.Widget.Font = Settings.GetSetting (FONT_SETTING, "Arial 12");
font_button.Widget.FontSet += HandleFontChanged;
}
tb.AppendItem (font_button);
tb.AppendItem (new SeparatorToolItem ());
if (bold_btn == null) {
bold_btn = new ToolBarToggleButton ("Toolbar.Bold.png", Translations.GetString ("Bold"), Translations.GetString ("Bold"));
bold_btn.Active = Settings.GetSetting (BOLD_SETTING, false);
bold_btn.Toggled += HandleBoldButtonToggled;
}
tb.AppendItem (bold_btn);
if (italic_btn == null) {
italic_btn = new ToolBarToggleButton ("Toolbar.Italic.png", Translations.GetString ("Italic"), Translations.GetString ("Italic"));
italic_btn.Active = Settings.GetSetting (ITALIC_SETTING, false);
italic_btn.Toggled += HandleItalicButtonToggled;
}
tb.AppendItem (italic_btn);
if (underscore_btn == null) {
underscore_btn = new ToolBarToggleButton ("Toolbar.Underline.png", Translations.GetString ("Underline"), Translations.GetString ("Underline"));
underscore_btn.Active = Settings.GetSetting (UNDERLINE_SETTING, false);
underscore_btn.Toggled += HandleUnderscoreButtonToggled;
}
tb.AppendItem (underscore_btn);
tb.AppendItem (new SeparatorToolItem ());
var alignment = (TextAlignment)Settings.GetSetting (ALIGNMENT_SETTING, (int) TextAlignment.Left);
if (left_alignment_btn == null) {
left_alignment_btn = new ToolBarToggleButton ("Toolbar.LeftAlignment.png", Translations.GetString ("Left Align"), Translations.GetString ("Left Align"));
left_alignment_btn.Active = alignment == TextAlignment.Left;
left_alignment_btn.Toggled += HandleLeftAlignmentButtonToggled;
}
tb.AppendItem (left_alignment_btn);
if (center_alignment_btn == null) {
center_alignment_btn = new ToolBarToggleButton ("Toolbar.CenterAlignment.png", Translations.GetString ("Center Align"), Translations.GetString ("Center Align"));
center_alignment_btn.Active = alignment == TextAlignment.Center;
center_alignment_btn.Toggled += HandleCenterAlignmentButtonToggled;
}
tb.AppendItem (center_alignment_btn);
if (Right_alignment_btn == null) {
Right_alignment_btn = new ToolBarToggleButton ("Toolbar.RightAlignment.png", Translations.GetString ("Right Align"), Translations.GetString ("Right Align"));
Right_alignment_btn.Active = alignment == TextAlignment.Right;
Right_alignment_btn.Toggled += HandleRightAlignmentButtonToggled;
}
tb.AppendItem (Right_alignment_btn);
if (fill_sep == null)
fill_sep = new Gtk.SeparatorToolItem ();
tb.AppendItem (fill_sep);
if (fill_label == null)
fill_label = new ToolBarLabel (string.Format (" {0}: ", Translations.GetString ("Text Style")));
tb.AppendItem (fill_label);
if (fill_button == null) {
fill_button = new ToolBarDropDownButton ();
fill_button.AddItem (Translations.GetString ("Normal"), Pinta.Resources.Icons.FillStyleFill, 0);
fill_button.AddItem (Translations.GetString ("Normal and Outline"), Pinta.Resources.Icons.FillStyleOutlineFill, 1);
fill_button.AddItem (Translations.GetString ("Outline"), Pinta.Resources.Icons.FillStyleOutline, 2);
fill_button.AddItem (Translations.GetString ("Fill Background"), Pinta.Resources.Icons.FillStyleBackground, 3);
fill_button.SelectedIndex = Settings.GetSetting (STYLE_SETTING, 0);
fill_button.SelectedItemChanged += HandleBoldButtonToggled;
}
tb.AppendItem (fill_button);
if (outline_sep == null)
outline_sep = new SeparatorToolItem ();
tb.AppendItem (outline_sep);
if (outline_width_label == null)
outline_width_label = new ToolBarLabel (string.Format (" {0}: ", Translations.GetString ("Outline width")));
tb.AppendItem (outline_width_label);
if (outline_width == null) {
outline_width = new (new SpinButton (1, 1e5, 1) { Value = Settings.GetSetting (OUTLINE_WIDTH_SETTING, 2) });
outline_width.Widget.ValueChanged += HandleFontChanged;
}
tb.AppendItem (outline_width);
outline_width.Visible = outline_width_label.Visible = outline_sep.Visible = StrokeText;
UpdateFont ();
if (PintaCore.Workspace.HasOpenDocuments) {
//Make sure the event handler is never added twice.
PintaCore.Workspace.ActiveDocument.LayerCloned -= FinalizeText;
//When an ImageSurface is Cloned, finalize the re-editable text (if applicable).
PintaCore.Workspace.ActiveDocument.LayerCloned += FinalizeText;
}
}
protected override void OnSaveSettings (ISettingsService settings)
{
base.OnSaveSettings (settings);
if (font_button is not null)
settings.PutSetting (FONT_SETTING, font_button.Widget.Font);
if (bold_btn is not null)
settings.PutSetting (BOLD_SETTING, bold_btn.Active);
if (italic_btn is not null)
settings.PutSetting (ITALIC_SETTING, italic_btn.Active);
if (underscore_btn is not null)
settings.PutSetting (UNDERLINE_SETTING, underscore_btn.Active);
if (left_alignment_btn is not null)
settings.PutSetting (ALIGNMENT_SETTING, (int) Alignment);
if (fill_button is not null)
settings.PutSetting (STYLE_SETTING, fill_button.SelectedIndex);
if (outline_width is not null)
settings.PutSetting (OUTLINE_WIDTH_SETTING, outline_width.Widget.ValueAsInt);
}
private void HandleFontChanged (object? sender, EventArgs e)
{
if (PintaCore.Workspace.HasOpenDocuments)
PintaCore.Workspace.ActiveDocument.Workspace.Canvas.GrabFocus ();
UpdateFont ();
}
private TextAlignment Alignment {
get {
if (Right_alignment_btn.Active)
return TextAlignment.Right;
else if (center_alignment_btn.Active)
return TextAlignment.Center;
else
return TextAlignment.Left;
}
}
private void HandlePintaCorePalettePrimaryColorChanged (object? sender, EventArgs e)
{
if (is_editing)
RedrawText (true, true);
}
private void HandleLeftAlignmentButtonToggled (object? sender, EventArgs e)
{
if (left_alignment_btn.Active) {
Right_alignment_btn.Active = false;
center_alignment_btn.Active = false;
} else if (!Right_alignment_btn.Active && !center_alignment_btn.Active) {
left_alignment_btn.Active = true;
}
UpdateFont ();
}
private void HandleCenterAlignmentButtonToggled (object? sender, EventArgs e)
{
if (center_alignment_btn.Active) {
Right_alignment_btn.Active = false;
left_alignment_btn.Active = false;
} else if (!Right_alignment_btn.Active && !left_alignment_btn.Active) {
center_alignment_btn.Active = true;
}
UpdateFont ();
}
private void HandleRightAlignmentButtonToggled (object? sender, EventArgs e)
{
if (Right_alignment_btn.Active) {
center_alignment_btn.Active = false;
left_alignment_btn.Active = false;
} else if (!center_alignment_btn.Active && !left_alignment_btn.Active) {
Right_alignment_btn.Active = true;
}
UpdateFont ();
}
private void HandleUnderscoreButtonToggled (object? sender, EventArgs e)
{
UpdateFont ();
}
private void HandleItalicButtonToggled (object? sender, EventArgs e)
{
UpdateFont ();
}
private void HandleBoldButtonToggled (object? sender, EventArgs e)
{
outline_width.Visible = outline_width_label.Visible = outline_sep.Visible = StrokeText;
UpdateFont ();
}
private void HandleSelectedLayerChanged(object? sender, EventArgs e)
{
UpdateFont();
}
private void UpdateFont ()
{
if (PintaCore.Workspace.HasOpenDocuments) {
var font = font_button.Widget.FontDesc.Copy ();
font.Weight = bold_btn.Active ? Pango.Weight.Bold : Pango.Weight.Normal;
font.Style = italic_btn.Active ? Pango.Style.Italic : Pango.Style.Normal;
CurrentTextEngine.SetFont (font, Alignment, underscore_btn.Active);
}
if (is_editing)
RedrawText (true, true);
}
private int OutlineWidth => outline_width.Widget.ValueAsInt;
protected bool StrokeText { get { return (fill_button.SelectedItem.GetTagOrDefault (0) >= 1 && fill_button.SelectedItem.GetTagOrDefault (0) != 3); } }
protected bool FillText { get { return fill_button.SelectedItem.GetTagOrDefault (0) <= 1 || fill_button.SelectedItem.GetTagOrDefault (0) == 3; } }
protected bool BackgroundFill { get { return fill_button.SelectedItem.GetTagOrDefault (0) == 3; } }
#endregion
#region Activation/Deactivation
protected override void OnActivated (Document? document)
{
base.OnActivated (document);
// We may need to redraw our text when the color changes
PintaCore.Palette.PrimaryColorChanged += HandlePintaCorePalettePrimaryColorChanged;
PintaCore.Palette.SecondaryColorChanged += HandlePintaCorePalettePrimaryColorChanged;
PintaCore.Layers.LayerAdded += HandleSelectedLayerChanged;
PintaCore.Layers.LayerRemoved += HandleSelectedLayerChanged;
PintaCore.Layers.SelectedLayerChanged += HandleSelectedLayerChanged;
// We always start off not in edit mode
is_editing = false;
}
protected override void OnCommit (Document? document)
{
StopEditing(false);
}
protected override void OnDeactivated(Document? document, BaseTool? newTool)
{
base.OnDeactivated (document, newTool);
// Stop listening for color change events
PintaCore.Palette.PrimaryColorChanged -= HandlePintaCorePalettePrimaryColorChanged;
PintaCore.Palette.SecondaryColorChanged -= HandlePintaCorePalettePrimaryColorChanged;
PintaCore.Layers.LayerAdded -= HandleSelectedLayerChanged;
PintaCore.Layers.LayerRemoved -= HandleSelectedLayerChanged;
PintaCore.Layers.SelectedLayerChanged -= HandleSelectedLayerChanged;
StopEditing(false);
}
#endregion
#region Mouse Handlers
protected override void OnMouseDown(Document document, ToolMouseEventArgs e)
{
ctrlKey = e.IsControlPressed;
//Store the mouse position.
Point pt = e.PointDouble.ToGdkPoint();
// Grab focus so we can get keystrokes
document.Workspace.Canvas.GrabFocus ();
if (selection != null)
selection.Dispose ();
selection = document.Selection.Clone ();
// A right click allows you to move the text around
if (e.MouseButton == MouseButton.Right)
{
//The user is dragging text with the right mouse button held down, so track the mouse as it moves.
tracking = true;
//Remember the position of the mouse before the text is dragged.
startMouseXY = e.PointDouble;
startClickPoint = clickPoint;
//Change the cursor to indicate that the text is being dragged.
SetCursor(cursor_hand);
return;
}
// The user clicked the left mouse button
if (e.MouseButton == MouseButton.Left)
{
// If the user is [editing or holding down Ctrl] and clicked
//within the text, move the cursor to the click location
if ((is_editing || ctrlKey) && CurrentTextBounds.ContainsCorrect(pt))
{
StartEditing();
//Change the position of the cursor to where the mouse clicked.
TextPosition p = CurrentTextLayout.PointToTextPosition(pt);
CurrentTextEngine.SetCursorPosition(p, true);
//Redraw the text with the new cursor position.
RedrawText(true, true);
return;
}
// We're already editing and the user clicked outside the text,
// commit the user's work, and start a new edit
switch (CurrentTextEngine.State)
{
// We were editing, save and stop
case TextMode.Uncommitted:
StopEditing(true);
break;
// We were editing, but nothing had been
// keyed. Stop editing.
case TextMode.Unchanged:
StopEditing(false);
break;
}
if (ctrlKey)
{
//Go through every UserLayer.
foreach (UserLayer ul in document.Layers.UserLayers)
{
//Check each UserLayer's editable text boundaries to see if they contain the mouse position.
if (ul.textBounds.ContainsCorrect(pt))
{
//The mouse clicked on editable text.
//Change the current UserLayer to the Layer that contains the text that was clicked on.
document.Layers.SetCurrentUserLayer (ul);
//The user is editing text now.
is_editing = true;
//Set the cursor in the editable text where the mouse was clicked.
TextPosition p = CurrentTextLayout.PointToTextPosition(pt);
CurrentTextEngine.SetCursorPosition(p, true);
//Redraw the editable text with the cursor.
RedrawText(true, true);
//Don't check any more UserLayers - stop at the first UserLayer that has editable text containing the mouse position.
return;
}
}
}
else
{
if (CurrentTextEngine.State == TextMode.NotFinalized)
{
//The user is making a new text and the old text hasn't been finalized yet.
FinalizeText();
}
if (!is_editing)
{
// Start editing at the cursor location
clickPoint = pt;
CurrentTextEngine.Clear();
clickPoint.Offset (0, -CurrentTextLayout.FontHeight/2);
CurrentTextEngine.Origin = clickPoint;
StartEditing();
RedrawText(true, true);
}
}
}
}
protected override void OnMouseMove (Document document, ToolMouseEventArgs e)
{
ctrlKey = e.IsControlPressed;
lastMousePosition = e.PointDouble.ToGdkPoint();
// If we're dragging the text around, do that
if (tracking)
{
Cairo.PointD delta = new Cairo.PointD(e.PointDouble.X - startMouseXY.X, e.PointDouble.Y - startMouseXY.Y);
clickPoint = new Point((int)(startClickPoint.X + delta.X), (int)(startClickPoint.Y + delta.Y));
CurrentTextEngine.Origin = clickPoint;
RedrawText(true, true);
}
else
{
UpdateMouseCursor(document);
}
}
protected override void OnMouseUp (Document document, ToolMouseEventArgs e)
{
// If we were dragging the text around, finish that up
if (tracking) {
Cairo.PointD delta = new Cairo.PointD (e.PointDouble.X - startMouseXY.X, e.PointDouble.Y - startMouseXY.Y);
clickPoint = new Point ((int)(startClickPoint.X + delta.X), (int)(startClickPoint.Y + delta.Y));
CurrentTextEngine.Origin = clickPoint;
RedrawText (false, true);
tracking = false;
SetCursor (null);
}
}
private void UpdateMouseCursor(Document document)
{
//Whether or not to show the normal text cursor.
bool showNormalCursor = false;
if (ctrlKey && PintaCore.Workspace.HasOpenDocuments)
{
//Go through every UserLayer.
foreach (UserLayer ul in document.Layers.UserLayers)
{
//Check each UserLayer's editable text boundaries to see if they contain the mouse position.
if (ul.textBounds.ContainsCorrect(lastMousePosition))
{
//The mouse is over editable text.
showNormalCursor = true;
}
}
}
else
{
showNormalCursor = true;
}
if (showNormalCursor)
{
if (!previousMouseCursorNormal)
{
SetCursor(DefaultCursor);
previousMouseCursorNormal = showNormalCursor;
if (PintaCore.Workspace.HasOpenDocuments)
RedrawText(is_editing, true);
}
}
else
{
if (previousMouseCursorNormal)
{
SetCursor(InvalidEditCursor);
previousMouseCursorNormal = showNormalCursor;
RedrawText(is_editing, true);
}
}
}
#endregion
#region Keyboard Handlers
protected override bool OnKeyDown (Document document, ToolKeyEventArgs e)
{
if (!PintaCore.Workspace.HasOpenDocuments) {
return false;
}
// If we are dragging the text, we
// aren't going to handle key presses
if (tracking)
return false;
// Ignore anything with Alt pressed
if (e.IsAltPressed)
return false;
ctrlKey = (e.Key == Gdk.Key.Control_L || e.Key == Gdk.Key.Control_R);
UpdateMouseCursor (document);
// Assume that we are going to handle the key
bool keyHandled = true;
if (is_editing)
{
switch (e.Key)
{
case Gdk.Key.BackSpace:
CurrentTextEngine.PerformBackspace();
break;
case Gdk.Key.Delete:
CurrentTextEngine.PerformDelete();
break;
case Gdk.Key.KP_Enter:
case Gdk.Key.Return:
CurrentTextEngine.PerformEnter();
break;
case Gdk.Key.Left:
CurrentTextEngine.PerformLeft(e.IsControlPressed, e.IsShiftPressed);
break;
case Gdk.Key.Right:
CurrentTextEngine.PerformRight(e.IsControlPressed, e.IsShiftPressed);
break;
case Gdk.Key.Up:
CurrentTextEngine.PerformUp(e.IsShiftPressed);
break;
case Gdk.Key.Down:
CurrentTextEngine.PerformDown(e.IsShiftPressed);
break;
case Gdk.Key.Home:
CurrentTextEngine.PerformHome(e.IsControlPressed, e.IsShiftPressed);
break;
case Gdk.Key.End:
CurrentTextEngine.PerformEnd(e.IsControlPressed, e.IsShiftPressed);
break;
case Gdk.Key.Next:
case Gdk.Key.Prior:
break;
case Gdk.Key.Escape:
StopEditing(false);
return true;
case Gdk.Key.Insert:
if (e.IsShiftPressed)
{
Gtk.Clipboard cb = Gtk.Clipboard.Get(Gdk.Atom.Intern("CLIPBOARD", false));
CurrentTextEngine.PerformPaste(cb);
}
else if (e.IsControlPressed)
{
Gtk.Clipboard cb = Gtk.Clipboard.Get(Gdk.Atom.Intern("CLIPBOARD", false));
CurrentTextEngine.PerformCopy(cb);
}
break;
default:
if (e.IsControlPressed)
{
if (e.Key == Gdk.Key.z)
{
//Ctrl + Z for undo while editing.
OnHandleUndo(document);
if (PintaCore.Workspace.ActiveDocument.History.CanUndo)
PintaCore.Workspace.ActiveDocument.History.Undo();
return true;
}
else if (e.Key == Gdk.Key.i)
{
italic_btn.Toggle ();
UpdateFont ();
}
else if (e.Key == Gdk.Key.b)
{
bold_btn.Toggle ();
UpdateFont ();
}
else if (e.Key == Gdk.Key.u)
{
underscore_btn.Toggle ();
UpdateFont ();
}
else if (e.Key == Gdk.Key.a)
{
// Select all of the text.
CurrentTextEngine.PerformHome (false, false);
CurrentTextEngine.PerformEnd (true, true);
}
else
{
//Ignore command shortcut.
return false;
}
}
else
{
if (e.Event is not null)
keyHandled = TryHandleChar(e.Event);
}
break;
}
// If we processed a key, update the display
if (keyHandled)
{
RedrawText(true, true);
}
}
else
{
// If we're not editing, allow the key press to be handled elsewhere (e.g. for selecting another tool).
keyHandled = false;
}
return keyHandled;
}
protected override bool OnKeyUp(Document document, ToolKeyEventArgs e)
{
if (e.Key == Gdk.Key.Control_L || e.Key == Gdk.Key.Control_R ||
e.IsControlPressed)
{
ctrlKey = false;
UpdateMouseCursor(document);
}
return false;
}
private bool TryHandleChar(EventKey eventKey)
{
// Try to handle it as a character
if (imContext.FilterKeypress (eventKey)) {
return true;
}
// We didn't handle the key
return false;
}
private void OnIMCommit (object o, CommitArgs args)
{
try {
var str = new StringBuilder ();
for (int i = 0; i < args.Str.Length; i++) {
char utf32Char;
if (char.IsHighSurrogate (args.Str, i)) {
utf32Char = (char)char.ConvertToUtf32 (args.Str, i);
i++;
} else {
utf32Char = args.Str[i];
}
str.Append (utf32Char.ToString ());
}
CurrentTextEngine.InsertText (str.ToString ());
} finally {
imContext.Reset ();
}
}
#endregion
#region Start/Stop Editing
private void StartEditing ()
{
is_editing = true;
imContext.ClientWindow = PintaCore.Workspace.ActiveWorkspace.Canvas.Window;
if (selection == null)
selection = PintaCore.Workspace.ActiveDocument.Selection.Clone ();
//Start ignoring any Surface.Clone calls from this point on (so that it doesn't start to loop).
ignoreCloneFinalizations = true;
//Store the previous state of the current UserLayer's and TextLayer's ImageSurfaces.
user_undo_surface = PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.Surface.Clone();
text_undo_surface = PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.TextLayer.Layer.Surface.Clone();
//Store the previous state of the Text Engine.
undo_engine = CurrentTextEngine.Clone();
//Stop ignoring any Surface.Clone calls from this point on.
ignoreCloneFinalizations = false;
}
private void StopEditing(bool finalize)
{
imContext.ClientWindow = null;
if (!PintaCore.Workspace.HasOpenDocuments)
return;
if (!is_editing)
return;
is_editing = false;
//Make sure that neither undo surface is null, the user is editing, and there are uncommitted changes.
if (text_undo_surface != null && user_undo_surface != null && CurrentTextEngine.State == TextMode.Uncommitted)
{
Document doc = PintaCore.Workspace.ActiveDocument;
RedrawText(false, true);
//Start ignoring any Surface.Clone calls from this point on (so that it doesn't start to loop).
ignoreCloneFinalizations = true;
//Create a new TextHistoryItem so that the committing of text can be undone.
doc.History.PushNewItem(new TextHistoryItem(Icon, Name,
text_undo_surface.Clone(), user_undo_surface.Clone(),
undo_engine!.Clone(), doc.Layers.CurrentUserLayer)); // NRT - Set in StartEditing
//Stop ignoring any Surface.Clone calls from this point on.
ignoreCloneFinalizations = false;
//Now that the text has been committed, change its state.
CurrentTextEngine.State = TextMode.NotFinalized;
}
RedrawText(false, true);
if (finalize)
{
FinalizeText();
}
}
#endregion
#region Text Drawing Methods
/// <summary>
/// Clears the entire TextLayer and redraw the previous text boundary.
/// </summary>
private void ClearTextLayer()
{
//Clear the TextLayer.
PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.TextLayer.Layer.Surface.Clear();
//Redraw the previous text boundary.
InflateAndInvalidate(PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.previousTextBounds);
}
/// <summary>
/// Draws the text.
/// </summary>
/// <param name="showCursor">Whether or not to show the mouse cursor in the drawing.</param>
/// <param name="useTextLayer">Whether or not to use the TextLayer (as opposed to the Userlayer).</param>
private void RedrawText (bool showCursor, bool useTextLayer)
{
Rectangle r = CurrentTextLayout.GetLayoutBounds();
r.Inflate(10 + OutlineWidth, 10 + OutlineWidth);
InflateAndInvalidate(r);
CurrentTextBounds = r;
Rectangle cursorBounds = Rectangle.Zero;
Cairo.ImageSurface surf;
if (!useTextLayer)
{
//Draw text on the current UserLayer's surface as finalized text.
surf = PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.Surface;
}
else
{
//Draw text on the current UserLayer's TextLayer's surface as re-editable text.
surf = PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.TextLayer.Layer.Surface;
ClearTextLayer();
}
using (var g = new Cairo.Context (surf)) {
g.Save ();
// Show selection if on text layer
if (useTextLayer) {
// Selected Text
Cairo.Color c = new Cairo.Color (0.7, 0.8, 0.9, 0.5);
foreach (Rectangle rect in CurrentTextLayout.SelectionRectangles)
g.FillRectangle (rect.ToCairoRectangle (), c);
}
if (selection != null) {
g.AppendPath (selection.SelectionPath);
g.FillRule = Cairo.FillRule.EvenOdd;
g.Clip ();
}
g.MoveTo (new Cairo.PointD (CurrentTextEngine.Origin.X, CurrentTextEngine.Origin.Y));
g.SetSourceColor (PintaCore.Palette.PrimaryColor);
//Fill in background
if (BackgroundFill) {
using (var g2 = new Cairo.Context (surf)) {
g2.FillRectangle(CurrentTextLayout.GetLayoutBounds().ToCairoRectangle(), PintaCore.Palette.SecondaryColor);
}
}
// Draw the text
if (FillText)
Pango.CairoHelper.ShowLayout (g, CurrentTextLayout.Layout);
if (FillText && StrokeText) {
g.SetSourceColor (PintaCore.Palette.SecondaryColor);
g.LineWidth = OutlineWidth;
Pango.CairoHelper.LayoutPath (g, CurrentTextLayout.Layout);
g.Stroke ();
} else if (StrokeText) {
g.SetSourceColor (PintaCore.Palette.PrimaryColor);
g.LineWidth = OutlineWidth;
Pango.CairoHelper.LayoutPath (g, CurrentTextLayout.Layout);
g.Stroke ();
}
if (showCursor) {
var loc = CurrentTextLayout.GetCursorLocation ();
var color = PintaCore.Palette.PrimaryColor;
g.Antialias = Cairo.Antialias.None;
g.DrawLine (new Cairo.PointD (loc.X, loc.Y),
new Cairo.PointD (loc.X, loc.Y + loc.Height),
color, 1);
cursorBounds = Rectangle.Inflate (loc, 2, 10);
}
g.Restore ();
if (useTextLayer && (is_editing || ctrlKey) && !CurrentTextEngine.IsEmpty())