void redrawFrom(int lno) {
if (lno < 0 || lno >= text.getLineCount()) return;
int y = text.getLocationAtOffset(text.getOffsetAtLine(lno)).y;
int height = text.getClientArea().height - y;
int width = text.getClientArea().width + text.getHorizontalPixel();
text.redraw(0, y, width, height, false);
}
/*
* @see AbstractInfoView#setInput(Object)
*/
protected void setInput(Object input) {
String javadocHtml = (String) input;
if (fIsUsingBrowserWidget) {
if (javadocHtml != null && javadocHtml.length() > 0) {
boolean RTL = (getSite().getShell().getStyle() & SWT.RIGHT_TO_LEFT) != 0;
if (RTL) {
StringBuffer buffer = new StringBuffer(javadocHtml);
HTMLPrinter.insertStyles(buffer, new String[] {"direction:rtl"}); // $NON-NLS-1$
javadocHtml = buffer.toString();
}
}
fBrowser.setText(javadocHtml);
} else {
fPresentation.clear();
Rectangle size = fText.getClientArea();
try {
javadocHtml =
((DefaultInformationControl.IInformationPresenterExtension) fPresenter)
.updatePresentation(
getSite().getShell(), javadocHtml, fPresentation, size.width, size.height);
} catch (IllegalArgumentException ex) {
// the javadoc might no longer be valid
return;
}
fText.setText(javadocHtml);
TextPresentation.applyTextPresentation(fPresentation, fText);
}
}
/**
* Hook to compute the menu location if the focus widget is a styled text widget.
*
* @param text the styled text widget that has the focus
* @return a widget relative position of the menu to pop up or <code>null</code> if now position
* inside the widget can be computed
*/
protected Point computeMenuLocation(StyledText text) {
int offset = text.getCaretOffset();
Point result = text.getLocationAtOffset(offset);
result.y += text.getLineHeight(offset);
if (!text.getClientArea().contains(result)) return null;
return result;
}
private Point computeMenuLocation(Control focus, Menu menu) {
Point cursorLocation = focus.getDisplay().getCursorLocation();
Rectangle clientArea = null;
Point result = null;
if (focus instanceof StyledText) {
StyledText styledText = (StyledText) focus;
clientArea = styledText.getClientArea();
result = computeMenuLocation(styledText);
} else if (focus instanceof Tree) {
Tree tree = (Tree) focus;
clientArea = tree.getClientArea();
result = computeMenuLocation(tree);
} else if (focus instanceof Table) {
Table table = (Table) focus;
clientArea = table.getClientArea();
result = computeMenuLocation(table);
}
if (result == null) {
result = focus.toControl(cursorLocation);
}
if (clientArea != null && !clientArea.contains(result)) {
result = new Point(clientArea.x + clientArea.width / 2, clientArea.y + clientArea.height / 2);
}
Rectangle shellArea = focus.getShell().getClientArea();
if (!shellArea.contains(focus.getShell().toControl(focus.toDisplay(result)))) {
result = new Point(shellArea.x + shellArea.width / 2, shellArea.y + shellArea.height / 2);
}
return focus.toDisplay(result);
}
/**
* Draw the given line range.
*
* @param gc
* @param startLine first line number
* @param endLine last line number (inclusive)
* @param x the X-coordinate of the drawing range
* @param w the width of the drawing range
*/
private void drawLineRange(GC gc, int startLine, int endLine, int x, int w) {
final int viewPortWidth = fTextWidget.getClientArea().width;
for (int line = startLine; line <= endLine; line++) {
int lineOffset = fTextWidget.getOffsetAtLine(line);
// line end offset including line delimiter
int lineEndOffset;
if (line < fTextWidget.getLineCount() - 1) {
lineEndOffset = fTextWidget.getOffsetAtLine(line + 1);
} else {
lineEndOffset = fTextWidget.getCharCount();
}
// line length excluding line delimiter
int lineLength = lineEndOffset - lineOffset;
while (lineLength > 0) {
char c = fTextWidget.getTextRange(lineOffset + lineLength - 1, 1).charAt(0);
if (c != '\r' && c != '\n') {
break;
}
--lineLength;
}
// compute coordinates of last character on line
Point endOfLine = fTextWidget.getLocationAtOffset(lineOffset + lineLength);
if (x - endOfLine.x > viewPortWidth) {
// line is not visible
continue;
}
// Y-coordinate of line
int y = fTextWidget.getLinePixel(line);
// compute first visible char offset
int startOffset;
try {
startOffset = fTextWidget.getOffsetAtLocation(new Point(x, y)) - 1;
if (startOffset - 2 <= lineOffset) {
startOffset = lineOffset;
}
} catch (IllegalArgumentException iae) {
startOffset = lineOffset;
}
// compute last visible char offset
int endOffset;
if (x + w >= endOfLine.x) {
// line end is visible
endOffset = lineEndOffset;
} else {
try {
endOffset = fTextWidget.getOffsetAtLocation(new Point(x + w - 1, y)) + 1;
if (endOffset + 2 >= lineEndOffset) {
endOffset = lineEndOffset;
}
} catch (IllegalArgumentException iae) {
endOffset = lineEndOffset;
}
}
// draw character range
if (endOffset > startOffset) {
drawCharRange(gc, startOffset, endOffset);
}
}
}
boolean getClientAreaChangedAndStoreNew() {
Rectangle clientArea = styledText.getClientArea();
if (currClientArea == null || !currClientArea.equals(clientArea)) {
currClientArea = clientArea;
return true;
}
return false;
}
void drawLine(int lno) {
if (lno < 0 || lno >= text.getLineCount()) return;
int y = text.getLocationAtOffset(text.getOffsetAtLine(lno)).y;
int height = 0;
if (text.getLineCount() > lno + 1)
height = text.getLocationAtOffset(text.getOffsetAtLine(lno + 1)).y - y;
else height = text.getLocationAtOffset(text.getCharCount()).y + text.getLineHeight();
int width = text.getClientArea().width + text.getHorizontalPixel();
text.redraw(0, y, width, height, false);
}
@Override
public void paintControl(PaintEvent event) {
/* Using event.gc.getFontMetrics().getAverageCharWidth()) was not
enough on low resolutions, as the rounding to an int seemed
enough to screw up the right margin, even when using a
monospaced font (this is the current theory).
*/
if (charsPerLine != getCharsPerLine()) {
charsPerLine = getCharsPerLine();
char buffer[] = new char[charsPerLine];
for (int i = 0; i < charsPerLine; i++) buffer[i] = 'm';
rightMargin = event.gc.stringExtent(new String(buffer)).x;
}
int lineHeight = source.getLineHeight();
int drawHeight = source.getClientArea().height;
int drawWidth = source.getClientArea().width;
event.gc.setForeground(color);
event.gc.setBackground(color);
// draw right margin
event.gc.drawLine(rightMargin, 0, rightMargin, drawHeight);
for (int i = source.getTopIndex(); i < source.getLineCount(); i++) {
// draw page lines
int at = source.getLinePixel(i);
if (isFirstLineOnPage(i)) event.gc.drawLine(0, at, drawWidth, at);
// draw paragraph end markers
String line = source.getLine(i);
if (line.length() > 0 && line.charAt(line.length() - 1) == PARAGRAPH_END) {
Point point = event.gc.stringExtent(line);
int span = point.y / 2;
event.gc.fillOval(point.x + span / 2, at + span / 2, span, span);
}
// check if line still visible
if (at + lineHeight > drawHeight) break;
}
adjustOtherThread.notifyPainted(source);
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.jface.fieldassist.IControlContentAdapter#getInsertionBounds(org.eclipse
* .swt.widgets.Control)
*/
@Override
public Rectangle getInsertionBounds(Control control) {
StyledText text = (StyledText) control;
Point caretOrigin = text.getLocationAtOffset(text.getCaretOffset());
return new Rectangle(
caretOrigin.x + text.getClientArea().x,
caretOrigin.y + text.getClientArea().y + 3,
1,
text.getLineHeight());
}
void updateViewport() {
baseEditor.lineCountEvent(text.getLineCount());
int start = 0;
try {
start = text.getTopIndex() - 1;
} catch (Exception e) {
e.printStackTrace(System.out);
}
if (start < 0) start = 0;
int end = start + text.getClientArea().height / text.getLineHeight();
baseEditor.visibleTextEvent(start, end - start + 2);
}
private synchronized void adjustOther(StyledText source, StyledText other) {
if (source == null) source = this.source;
if (other == null) other = this.other;
if (source == null) {
logWriter.println("WARNING: attempting to adjust source but no source StyledText");
return;
}
if (other == null) {
logWriter.println("WARNING: attempting to adjust other but no other StyledText");
return;
}
int caretOffset = source.getCaretOffset();
int lineIndex = source.getLineAtOffset(caretOffset);
int otherLineHeight = other.getLineHeight();
int otherLineRealPixel = lineIndex * otherLineHeight;
int sourceLinePixel = source.getLinePixel(lineIndex);
int otherTopPixel = otherLineRealPixel - sourceLinePixel;
int otherHeight = other.getClientArea().height;
int otherLineBelow = otherHeight - (sourceLinePixel + otherLineHeight);
int otherLineCount = other.getLineCount();
int otherLinesBelow = otherLineCount - lineIndex;
int otherLinesBelowHeight = otherLinesBelow * otherLineHeight;
int otherBottomGap = otherHeight - (sourceLinePixel + otherLinesBelowHeight);
// other would have to scroll before first line
if (otherTopPixel < 0) {
int sourceTopPixel = source.getTopPixel() - otherTopPixel;
otherTopPixel = 0;
source.setTopPixel(sourceTopPixel);
}
// other line would be partially past the bottom of view
else if (otherLineBelow < 0) {
int sourceTopPixel = source.getTopPixel() - otherLineBelow;
otherTopPixel -= otherLineBelow;
source.setTopPixel(sourceTopPixel);
}
// other would have to scroll past last line
else if (otherBottomGap > 0) {
int sourceTopPixel = source.getTopPixel() - otherBottomGap;
otherTopPixel -= otherBottomGap;
source.setTopPixel(sourceTopPixel);
}
other.setTopPixel(otherTopPixel);
redraw();
}
private Point computeWordStart() {
ITextSelection selection = (ITextSelection) fEditor.getSelectionProvider().getSelection();
IRegion textRegion =
CWordFinder.findWord(fEditor.getViewer().getDocument(), selection.getOffset());
if (textRegion == null) return null;
IRegion widgetRegion = modelRange2WidgetRange(textRegion);
if (widgetRegion == null) return null;
int start = widgetRegion.getOffset();
StyledText styledText = fEditor.getViewer().getTextWidget();
Point result = styledText.getLocationAtOffset(start);
result.y += styledText.getLineHeight(start);
if (!styledText.getClientArea().contains(result)) return null;
return result;
}
@Override
public void caretMoved(CaretEvent ignored) {
int caretOffset = source.getCaretOffset();
int lineIndex = source.getLineAtOffset(caretOffset);
int lineOffset = source.getOffsetAtLine(lineIndex);
// play line margin bell
if (lineMarginClip != null && lineMarginBell > 0 && caretOffset == prevCaretOffset + 1) {
if (caretOffset - lineOffset == lineMarginBell)
if (!lineMarginClip.isActive()) {
lineMarginClip.setFramePosition(0);
lineMarginClip.start();
}
}
// play line end bell
if (lineEndClip != null && charsPerLine > 0 && caretOffset == prevCaretOffset + 1) {
if (caretOffset - lineOffset == charsPerLine)
if (!lineEndClip.isActive()) {
lineEndClip.setFramePosition(0);
lineEndClip.start();
}
}
prevCaretOffset = caretOffset;
// scroll other text to match current
if (lineIndex == prevLineIndex) return;
prevLineIndex = lineIndex;
if (source != currentText) return;
int sourceLinePixel = source.getLinePixel(lineIndex);
int sourceHeight = source.getClientArea().height;
int sourceLineHeight = source.getLineHeight();
// check if have to wait until after paint event
if (sourceLinePixel < 0 || sourceLinePixel + sourceLineHeight > sourceHeight)
adjustOtherThread.waitPainted(source, other);
else adjustOtherThread.adjustOther(source, other);
}
private Rectangle getLineRectangle(Position position) {
if (position == null) {
return null;
}
// if the position that is about to be drawn was deleted then we can't
if (position.isDeleted()) {
return null;
}
int widgetOffset = 0;
if (fViewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) fViewer;
widgetOffset = extension.modelOffset2WidgetOffset(position.getOffset());
if (widgetOffset == -1) {
return null;
}
} else {
IRegion visible = fViewer.getVisibleRegion();
widgetOffset = position.getOffset() - visible.getOffset();
if (widgetOffset < 0 || visible.getLength() < widgetOffset) {
return null;
}
}
StyledText textWidget = fViewer.getTextWidget();
// check for https://bugs.eclipse.org/bugs/show_bug.cgi?id=64898
// this is a guard against the symptoms but not the actual solution
if (0 <= widgetOffset && widgetOffset <= textWidget.getCharCount()) {
Point upperLeft = textWidget.getLocationAtOffset(widgetOffset);
int width = textWidget.getClientArea().width + textWidget.getHorizontalPixel();
int height = textWidget.getLineHeight(widgetOffset);
return new Rectangle(0, upperLeft.y, width, height);
}
return null;
}
public int getViewportHeight() {
StyledText te = getSourceViewer().getTextWidget();
Rectangle clArea = te.getClientArea();
if (!clArea.isEmpty()) return clArea.height;
return 0;
}
