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Fix caret of raw insert mode of text editor on HiDPI screens #3230

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Merged
HeikoKlare merged 1 commit into from
Jan 21, 2026
Merged

Fix caret of raw insert mode of text editor on HiDPI screens #3230

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40 changes: 18 additions & 22 deletions ...org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/AbstractTextEditor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,7 @@
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.ImageDataProvider;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.RGB;
Expand Down Expand Up @@ -6961,32 +6962,27 @@ private Caret createInsertCaret(StyledText styledText) {
}

private Image createRawInsertModeCaretImage(StyledText styledText) {

PaletteData caretPalette = new PaletteData(new RGB(0, 0, 0), new RGB(255, 255, 255));
int width = getCaretWidthPreference();
int widthOffset = width - 1;

// XXX: Filed request to get a caret with auto-height:
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=118612
ImageData imageData = new ImageData(4 + widthOffset, styledText.getLineHeight(), 1, caretPalette);

Display display = styledText.getDisplay();
Image bracketImage = new Image(display, imageData);
GC gc = new GC(bracketImage);
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.setLineWidth(0); // NOTE: 0 means width is 1 but with optimized performance
int height = imageData.height / 3;
// gap between two bars of one third of the height
// draw boxes using lines as drawing a line of a certain width produces
// rounded corners.
for (int i = 0; i < width; i++) {
gc.drawLine(i, 0, i, height - 1);
gc.drawLine(i, imageData.height - height, i, imageData.height - 1);
}

gc.dispose();

return bracketImage;
int height = styledText.getLineHeight();
ImageDataProvider imageDataProvider = zoom -> {
double scaleFactor = zoom / 100.0;
int w = (int) (width * scaleFactor + 0.5);
int h = (int) (height * scaleFactor + 0.5);
ImageData imageData = new ImageData(w, h, 1, caretPalette);
// gap between two bars of one third of the height
int h3 = h / 3;
for (int x = 0; x < w; x++) {
for (int y = 0; y < h3; y++) {
imageData.setPixel(x, y, 1);
imageData.setPixel(x, h - y - 1, 1);
}
}
return imageData;
};
return new Image(styledText.getDisplay(), imageDataProvider);
}

private Caret createRawInsertModeCaret(StyledText styledText) {
Expand Down
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