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();
}
}
protected override bool OnHandleCopy(Document document, Clipboard cb)
{
if (!is_editing)
{
return(false);
}
CurrentTextEngine.PerformCopy(cb);
return(true);
}
public override bool TryHandleCopy(Clipboard cb)
{
if (CurrentTextEngine.EditMode == EditingMode.NotEditing)
{
return(false);
}
CurrentTextEngine.PerformCopy(cb);
return(true);
}
public override bool TryHandleCopy(Clipboard cb)
{
if (!is_editing)
{
return(false);
}
CurrentTextEngine.PerformCopy(cb);
return(true);
}
private bool TryHandleChar(EventKey eventKey)
{
// Try to handle it as a character
if (CurrentTextEngine.HandleKeyPress(eventKey))
{
return(true);
}
// We didn't handle the key
return(false);
}
/// <summary>
/// Finalize re-editable text (if applicable).
/// </summary>
public void FinalizeText()
{
//If this is true, don't finalize any text - this is used to prevent the code from looping recursively.
if (!ignoreCloneFinalizations)
{
//Only bother finalizing text if editing.
if (CurrentTextEngine.EditMode == EditingMode.Editing)
{
//Start ignoring any Surface.Clone calls from this point on (so that it doesn't start to loop).
ignoreCloneFinalizations = true;
Document doc = PintaCore.Workspace.ActiveDocument;
//Create a backup of everything before redrawing the text and etc.
Cairo.ImageSurface oldTextSurface = doc.CurrentUserLayer.TextLayer.Surface.Clone();
Cairo.ImageSurface oldUserSurface = doc.CurrentUserLayer.Surface.Clone();
TextEngine oldTextEngine = CurrentTextEngine.Clone();
//Draw the text onto the UserLayer (without the cursor) rather than the TextLayer.
RedrawText(false, false);
//Clear the TextLayer.
doc.CurrentUserLayer.TextLayer.Clear();
//Clear the text and its boundaries.
CurrentTextEngine.Clear();
CurrentTextBounds = Gdk.Rectangle.Zero;
//Create a new TextHistoryItem so that the finalization of the text can be undone. Construct
//it on the spot so that it is more memory efficient if the changes are small.
TextHistoryItem hist = new TextHistoryItem(Icon, FinalizeName, oldTextSurface, oldUserSurface, oldTextEngine, doc.CurrentUserLayer);
//Add the new TextHistoryItem.
doc.History.PushNewItem(hist);
//Stop ignoring any Surface.Clone calls from this point on.
ignoreCloneFinalizations = false;
//Now that the text has been finalized, change its state.
CurrentTextEngine.textMode = TextMode.Unchanged;
}
}
}
private void UpdateFont()
{
if (CurrentTextEngine != null)
{
CurrentTextEngine.Alignment = Alignment;
CurrentTextEngine.SetFont(Font, FontSize, bold_btn.Active, italic_btn.Active, underscore_btn.Active);
}
if (is_editing)
{
RedrawText(true, true);
}
}
protected override bool OnHandlePaste(Document document, Clipboard cb)
{
if (!is_editing)
{
return(false);
}
if (!CurrentTextEngine.PerformPaste(cb))
{
return(false);
}
RedrawText(true, true);
return(true);
}
public override bool TryHandlePaste(Clipboard cb)
{
if (!is_editing)
{
return(false);
}
if (!CurrentTextEngine.PerformPaste(cb))
{
return(false);
}
RedrawText(true, true);
return(true);
}
private void StartEditing()
{
is_editing = true;
//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.CurrentUserLayer.Surface.Clone();
text_undo_surface = PintaCore.Workspace.ActiveDocument.CurrentUserLayer.TextLayer.Surface.Clone();
undo_engine = CurrentTextEngine.Clone();
//Stop ignoring any Surface.Clone calls from this point on.
ignoreCloneFinalizations = false;
}
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);
}
}
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.IsControlKey();
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 (keyHandled)
{
imContext.FocusOut();
RedrawText(true, true);
imContext.FocusIn();
}
}
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 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
imContext.FocusIn();
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();
UpdateFont();
clickPoint.Offset(0, -CurrentTextLayout.FontHeight / 2);
CurrentTextEngine.Origin = clickPoint;
StartEditing();
RedrawText(true, true);
}
}
}
}
/// <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)
{
selection.Clip(g);
}
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)) {
if (selection != null)
{
selection.Clip(g2);
}
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())
{
//Draw the text edit rectangle.
g.Save();
g.Translate(.5, .5);
using (Cairo.Path p = g.CreateRectanglePath(CurrentTextBounds.ToCairoRectangle())) {
g.AppendPath(p);
}
g.LineWidth = 1;
g.SetSourceColor(new Cairo.Color(1, 1, 1));
g.StrokePreserve();
g.SetDash(new double[] { 2, 4 }, 0);
g.SetSourceColor(new Cairo.Color(1, .1, .2));
g.Stroke();
g.Restore();
}
}
InflateAndInvalidate(PintaCore.Workspace.ActiveDocument.Layers.CurrentUserLayer.previousTextBounds);
PintaCore.Workspace.Invalidate(old_cursor_bounds);
InflateAndInvalidate(r);
PintaCore.Workspace.Invalidate(cursorBounds);
old_cursor_bounds = cursorBounds;
}
protected override void OnKeyDown(DrawingArea canvas, KeyPressEventArgs args)
{
if (!PintaCore.Workspace.HasOpenDocuments)
{
args.RetVal = false;
return;
}
Gdk.ModifierType modifier = args.Event.State;
// If we are dragging the text, we
// aren't going to handle key presses
if (tracking)
{
return;
}
// Ignore anything with Alt pressed
if ((modifier & Gdk.ModifierType.Mod1Mask) != 0)
{
return;
}
ctrlKey = (args.Event.Key == Gdk.Key.Control_L || args.Event.Key == Gdk.Key.Control_R);
UpdateMouseCursor();
// Assume that we are going to handle the key
bool keyHandled = true;
if (is_editing)
{
switch (args.Event.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((modifier & Gdk.ModifierType.ControlMask) != 0, (modifier & Gdk.ModifierType.ShiftMask) != 0);
break;
case Gdk.Key.Right:
CurrentTextEngine.PerformRight((modifier & Gdk.ModifierType.ControlMask) != 0, (modifier & Gdk.ModifierType.ShiftMask) != 0);
break;
case Gdk.Key.Up:
CurrentTextEngine.PerformUp((modifier & Gdk.ModifierType.ShiftMask) != 0);
break;
case Gdk.Key.Down:
CurrentTextEngine.PerformDown((modifier & Gdk.ModifierType.ShiftMask) != 0);
break;
case Gdk.Key.Home:
CurrentTextEngine.PerformHome((modifier & Gdk.ModifierType.ControlMask) != 0, (modifier & Gdk.ModifierType.ShiftMask) != 0);
break;
case Gdk.Key.End:
CurrentTextEngine.PerformEnd((modifier & Gdk.ModifierType.ControlMask) != 0, (modifier & Gdk.ModifierType.ShiftMask) != 0);
break;
case Gdk.Key.Next:
case Gdk.Key.Prior:
break;
case Gdk.Key.Escape:
StopEditing(false);
return;
case Gdk.Key.Insert:
if (modifier.IsShiftPressed())
{
Gtk.Clipboard cb = Gtk.Clipboard.Get(Gdk.Atom.Intern("CLIPBOARD", false));
CurrentTextEngine.PerformPaste(cb);
}
else if (modifier.IsControlPressed())
{
Gtk.Clipboard cb = Gtk.Clipboard.Get(Gdk.Atom.Intern("CLIPBOARD", false));
CurrentTextEngine.PerformCopy(cb);
}
break;
default:
if (modifier.IsControlPressed())
{
if (args.Event.Key == Gdk.Key.z)
{
//Ctrl + Z for undo while editing.
TryHandleUndo();
if (PintaCore.Workspace.ActiveDocument.History.CanUndo)
{
PintaCore.Workspace.ActiveDocument.History.Undo();
}
return;
}
else if (args.Event.Key == Gdk.Key.i)
{
italic_btn.Toggle();
UpdateFont();
}
else if (args.Event.Key == Gdk.Key.b)
{
bold_btn.Toggle();
UpdateFont();
}
else if (args.Event.Key == Gdk.Key.u)
{
underscore_btn.Toggle();
UpdateFont();
}
else if (args.Event.Key == Gdk.Key.a)
{
// Select all of the text.
CurrentTextEngine.PerformHome(false, false);
CurrentTextEngine.PerformEnd(true, true);
}
else
{
//Ignore command shortcut.
return;
}
}
else
{
keyHandled = TryHandleChar(args.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;
}
args.RetVal = keyHandled;
}
protected override void OnMouseDown(DrawingArea canvas, ButtonPressEventArgs args, Cairo.PointD point)
{
ctrlKey = (args.Event.State & ModifierType.ControlMask) != 0;
//Store the mouse position.
Point pt = point.ToGdkPoint();
// Grab focus so we can get keystrokes
PintaCore.Chrome.Canvas.GrabFocus();
if (selection != null)
{
selection.DisposeSelection();
}
selection = PintaCore.Workspace.ActiveDocument.Selection.Clone();
// A right click allows you to move the text around
if (args.Event.Button == 3)
{
//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 = point;
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 (args.Event.Button == 1)
{
// 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.
Position p = CurrentTextEngine.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.EditMode)
{
// We were editing, save and stop
case EditingMode.Editing:
StopEditing(true);
break;
// We were editing, but nothing had been
// keyed. Stop editing.
case EditingMode.EmptyEdit:
StopEditing(false);
break;
}
if (ctrlKey)
{
//Go through every UserLayer.
foreach (UserLayer ul in PintaCore.Workspace.ActiveDocument.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.
PintaCore.Workspace.ActiveDocument.SetCurrentUserLayer(ul);
//The user is editing text now.
is_editing = true;
//Set the cursor in the editable text where the mouse was clicked.
Position p = CurrentTextEngine.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.textMode == 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, -CurrentTextEngine.FontHeight / 2);
CurrentTextEngine.Origin = clickPoint;
StartEditing();
RedrawText(true, true);
}
}
}
}
