TextLayout.d:2915 causes EXCEPTION_ACCESS_VIOLATION ?
Frank Benoit
keinfarbton at googlemail.com
Mon Aug 11 08:20:21 PDT 2008
yidabu schrieb:
> Environment: dwt-win svn.
>
> I porting styledtext.Snippet212, cause runtime exception:
>
> Unhandled Exception: EXCEPTION_ACCESS_VIOLATION(0xc0000005) at ntdll.dll (0x7c90316c) thread(1480)
> ->us
> #0 ?? () at dwt\graphics\TextLayout.d:2915 from ntdll.dll
> #1 0x77f205bf in ?? () at dwt\graphics\TextLayout.d:2915 from GDI32.dll
> #2 0x00483c72 in dwt.graphics.TextLayout.TextLayout.shape () at dwt\graphics\TextLayout.d:2915
> #3 0x0047bfff in dwt.graphics.TextLayout.TextLayout.computeRuns () at dwt\graphics\TextLayout.d:267
> #4 0x00480474 in dwt.graphics.Rectangle.Rectangle dwt.graphics.TextLayout.TextLayout.getBounds () at dwt\graphics\TextLayout.d:1387
> #5 0x00411ea7 in dwt.graphics.Point.Point dwt.custom.StyledText.StyledText.computeSize () at dwt\custom\StyledText.d:1784
> #6 0x0041f24b in dwt.layout.GridData.GridData.computeSize () at dwt\layout\GridData.d:484
> #7 0x0043258f in dwt.graphics.Point.Point dwt.layout.GridLayout.GridLayout.layout () at dwt\layout\GridLayout.d:232
> #8 0x00432325 in dwt.layout.GridLayout.GridLayout.layout () at dwt\layout\GridLayout.d:208
> #9 0x004999af in dwt.widgets.Composite.Composite.updateLayout () at dwt\widgets\Composite.d:1170
> #10 0x00498eba in dwt.widgets.Composite.Composite.sendResize () at dwt\widgets\Composite.d:879
> #11 0x00499053 in dwt.widgets.Composite.Composite.setBounds () at dwt\widgets\Composite.d:924
> #12 0x004d959d in dwt.widgets.Decorations.Decorations.setBounds () at dwt\widgets\Decorations.d:888
> #13 0x0042f9a2 in dwt.widgets.Shell.Shell.setBounds () at dwt\widgets\Shell.d:1460
> #14 0x004733f3 in dwt.widgets.Control.Control.setBounds () at dwt\widgets\Control.d:2639
> #15 0x00473d27 in dwt.widgets.Control.Control.setSize () at dwt\widgets\Control.d:3153
> #16 0x004042c8 in _Dmain () at Snippet212.d:171
> #17 0x00645778 in extern (C) int dmain2.main(int, char**) . void runMain(void*) () from dmain2
> #18 0x006457af in extern (C) int dmain2.main(int, char**) . void runAll(void*) () from dmain2
> #19 0x006454f0 in _main () from dmain2
> #20 0x0065f801 in _mainCRTStartup () from constart
> #21 0x7c816fd7 in ?? () from KERNEL32.dll
>
>
> Code:
>
> /*******************************************************************************
> * Copyright (c) 2000, 2004 IBM Corporation and others.
> * All rights reserved. This program and the accompanying materials
> * are made available under the terms of the Eclipse Public License v1.0
> * which accompanies this distribution, and is available at
> * http://www.eclipse.org/legal/epl-v10.html
> *
> * Contributors:
> * IBM Corporation - initial API and implementation
> * Port to the D programming language:
> * yidabu at gmail dot com ( D China http://www.d-programming-language-china.org/ )
> *******************************************************************************/
> /*
> Unhandled Exception: EXCEPTION_ACCESS_VIOLATION(0xc0000005) at ntdll.dll (0x7c90316c) thread(1480)
> ->us
> #0 ?? () at dwt\graphics\TextLayout.d:2915 from ntdll.dll
> #1 0x77f205bf in ?? () at dwt\graphics\TextLayout.d:2915 from GDI32.dll
> #2 0x00483c72 in dwt.graphics.TextLayout.TextLayout.shape () at dwt\graphics\TextLayout.d:2915
> #3 0x0047bfff in dwt.graphics.TextLayout.TextLayout.computeRuns () at dwt\graphics\TextLayout.d:267
> #4 0x00480474 in dwt.graphics.Rectangle.Rectangle dwt.graphics.TextLayout.TextLayout.getBounds () at dwt\graphics\TextLayout.d:1387
> #5 0x00411ea7 in dwt.graphics.Point.Point dwt.custom.StyledText.StyledText.computeSize () at dwt\custom\StyledText.d:1784
> #6 0x0041f24b in dwt.layout.GridData.GridData.computeSize () at dwt\layout\GridData.d:484
> #7 0x0043258f in dwt.graphics.Point.Point dwt.layout.GridLayout.GridLayout.layout () at dwt\layout\GridLayout.d:232
> #8 0x00432325 in dwt.layout.GridLayout.GridLayout.layout () at dwt\layout\GridLayout.d:208
> #9 0x004999af in dwt.widgets.Composite.Composite.updateLayout () at dwt\widgets\Composite.d:1170
> #10 0x00498eba in dwt.widgets.Composite.Composite.sendResize () at dwt\widgets\Composite.d:879
> #11 0x00499053 in dwt.widgets.Composite.Composite.setBounds () at dwt\widgets\Composite.d:924
> #12 0x004d959d in dwt.widgets.Decorations.Decorations.setBounds () at dwt\widgets\Decorations.d:888
> #13 0x0042f9a2 in dwt.widgets.Shell.Shell.setBounds () at dwt\widgets\Shell.d:1460
> #14 0x004733f3 in dwt.widgets.Control.Control.setBounds () at dwt\widgets\Control.d:2639
> #15 0x00473d27 in dwt.widgets.Control.Control.setSize () at dwt\widgets\Control.d:3153
> #16 0x004042c8 in _Dmain () at Snippet212.d:171
> #17 0x00645778 in extern (C) int dmain2.main(int, char**) . void runMain(void*) () from dmain2
> #18 0x006457af in extern (C) int dmain2.main(int, char**) . void runAll(void*) () from dmain2
> #19 0x006454f0 in _main () from dmain2
> #20 0x0065f801 in _mainCRTStartup () from constart
> #21 0x7c816fd7 in ?? () from KERNEL32.dll
> */
> module styledtext.Snippet212;
> /**
> * StyledText snippet: embed images
> *
> * For a list of all SWT example snippets see
> * http://www.eclipse.org/swt/snippets/
> *
> * @since 3.2
> */
>
> import dwt.DWT;
> import dwt.custom.StyledText;
> import dwt.custom.StyleRange;
> import dwt.layout.GridLayout;
> import dwt.layout.GridData;
> import dwt.widgets.Display;
> import dwt.widgets.Shell;
> import dwt.widgets.Button;
> import dwt.widgets.FileDialog;
> import dwt.widgets.Event;
> import dwt.widgets.Listener;
> import dwt.custom.PaintObjectEvent;
> import dwt.custom.PaintObjectListener;
> import dwt.events.VerifyEvent;
> import dwt.events.VerifyListener;
> import dwt.graphics.FontData;
> import dwt.graphics.Font;
> import dwt.graphics.Rectangle;
> import dwt.graphics.GC;
> import dwt.graphics.Image;
> import dwt.graphics.GlyphMetrics;
> import dwt.dwthelper.utils;
> import dwt.dwthelper.System;
>
> void main() {
> static StyledText styledText;
> static String text =
> "This snippet shows how to embed images in a StyledText.\n"
> "Here is one: \uFFFC, and here is another: \uFFFC."
> "Use the add button to add an image from your filesystem to the StyledText at the current caret offset.";
> static Image[] images;
> static int[] offsets;
>
> static void addImage(Image image, int offset) {
> StyleRange style = new StyleRange ();
> style.start = offset;
> style.length = 1;
> Rectangle rect = image.getBounds();
> style.metrics = new GlyphMetrics(rect.height, 0, rect.width);
> styledText.setStyleRange(style);
> }
>
>
> Display display = new Display();
> Shell shell = new Shell(display);
> shell.setLayout(new GridLayout());
> styledText = new StyledText(shell, DWT.WRAP | DWT.BORDER);
> styledText.setLayoutData(new GridData(DWT.FILL, DWT.FILL, true, true));
> styledText.setText(text);
> images = [
> display.getSystemImage(DWT.ICON_QUESTION),
> display.getSystemImage(DWT.ICON_INFORMATION)
> ];
> offsets = new int[images.length];
> int lastOffset = 0;
> for (int i = 0; i < images.length; i++) {
> int offset = text.indexOf("\uFFFC", lastOffset);
> offsets[i] = offset;
> addImage(images[i], offset);
> lastOffset = offset + 1;
> }
>
> void onVerify(Event e) {
> int start = e.start;
> int replaceCharCount = e.end - e.start;
> int newCharCount = e.text.length;
> for (int i = 0; i < offsets.length; i++) {
> int offset = offsets[i];
> if (start <= offset && offset < start + replaceCharCount) {
> // this image is being deleted from the text
> if (images[i] !is null && !images[i].isDisposed()) {
> images[i].dispose();
> images[i] = null;
> }
> offset = -1;
> }
> if (offset != -1 && offset >= start) offset += newCharCount - replaceCharCount;
> offsets[i] = offset;
> }
> }
> // use a verify listener to keep the offsets up to date
> styledText.addListener(DWT.Verify, dgListener(&onVerify));
>
> styledText.addPaintObjectListener(new class(images, offsets) PaintObjectListener {
> Image[] images;
> int[] offsets;
> this( Image[] images_, int[] offsets_) {
> this.images = images_;
> this.offsets = offsets_;
> }
> public void paintObject(PaintObjectEvent event) {
> GC gc = event.gc;
> StyleRange style = event.style;
> int start = style.start;
> for (int i = 0; i < offsets.length; i++) {
> int offset = offsets[i];
> if (start == offset) {
> Image image = images[i];
> int x = event.x;
> int y = event.y + event.ascent - style.metrics.ascent;
> gc.drawImage(image, x, y);
> }
> }
> }
> });
>
> Button button = new Button (shell, DWT.PUSH);
> button.setText("Add Image");
> button.setLayoutData(new GridData(DWT.CENTER, DWT.CENTER, false, false));
>
> void onSelection(Event e)
> {
> FileDialog dialog = new FileDialog(shell);
> String filename = dialog.open();
> if (filename !is null) {
> try {
> Image image = new Image(display, filename);
> int offset = styledText.getCaretOffset();
> styledText.replaceTextRange(offset, 0, "\uFFFC");
> int index = 0;
> while (index < offsets.length) {
> if (offsets[index] == -1 && images[index] is null) break;
> index++;
> }
> if (index == offsets.length) {
> int[] tmpOffsets = new int[index + 1];
> System.arraycopy(offsets, 0, tmpOffsets, 0, offsets.length);
> offsets = tmpOffsets;
> Image[] tmpImages = new Image[index + 1];
> System.arraycopy(images, 0, tmpImages, 0, images.length);
> images = tmpImages;
> }
> offsets[index] = offset;
> images[index] = image;
> addImage(image, offset);
> } catch (Exception e) {
> ExceptionPrintStackTrace(e);
> }
> }
> }
> button.addListener(DWT.Selection, dgListener(&onSelection));
> shell.setSize(400, 400);
> shell.open();
> while (!shell.isDisposed()) {
> if (!display.readAndDispatch())
> display.sleep();
> }
> for (int i = 0; i < images.length; i++) {
> Image image = images[i];
> if (image !is null && !image.isDisposed()) {
> image.dispose();
> }
> }
> display.dispose();
>
> }
>
>
>
>
>
Complicated, takes more time.
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