--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.ui.text;
+
+import net.sourceforge.phpdt.internal.ui.text.java.hover.SourceViewerInformationControl;
+
+import org.eclipse.jface.resource.JFaceResources;
+import org.eclipse.jface.text.Assert;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextViewerExtension;
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.graphics.Font;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Shell;
+
+/**
+ * Source viewer used to display quick diff hovers.
+ *
+ * @since 3.0
+ */
+public class CustomSourceInformationControl extends
+ SourceViewerInformationControl {
+
+ /** The font name for the viewer font - the same as the java editor's. */
+ private static final String SYMBOLIC_FONT_NAME = "net.sourceforge.phpdt.ui.editors.textfont"; //$NON-NLS-1$
+
+ /**
+ * The maximum width of the control, set in
+ * <code>setSizeConstraints(int, int)</code>.
+ */
+ int fMaxWidth = Integer.MAX_VALUE;
+
+ /**
+ * The maximum height of the control, set in
+ * <code>setSizeConstraints(int, int)</code>.
+ */
+ int fMaxHeight = Integer.MAX_VALUE;
+
+ /**
+ * The partition type to be used as the starting partition type by the
+ * paritition scanner.
+ */
+ private String fPartition;
+
+ /** The horizontal scroll index. */
+ private int fHorizontalScrollPixel;
+
+ /*
+ * @see org.eclipse.jface.text.IInformationControl#setSizeConstraints(int,
+ * int)
+ */
+ public void setSizeConstraints(int maxWidth, int maxHeight) {
+ fMaxWidth = maxWidth;
+ fMaxHeight = maxHeight;
+ }
+
+ /**
+ * Creates a new information control.
+ *
+ * @param parent
+ * the shell that is the parent of this hover / control
+ * @param partition
+ * the initial partition type to be used for the underlying
+ * viewer
+ */
+ public CustomSourceInformationControl(Shell parent, String partition) {
+ super(parent);
+ setViewerFont();
+ setStartingPartitionType(partition);
+ }
+
+ /*
+ * @see org.eclipse.jface.text.IInformationControl#computeSizeHint()
+ */
+ public Point computeSizeHint() {
+ Point size = super.computeSizeHint();
+ size.x = Math.min(size.x, fMaxWidth);
+ size.y = Math.min(size.y, fMaxHeight);
+ return size;
+ }
+
+ /**
+ * Sets the font for this viewer sustaining selection and scroll position.
+ */
+ private void setViewerFont() {
+ Font font = JFaceResources.getFont(SYMBOLIC_FONT_NAME);
+
+ if (getViewer().getDocument() != null) {
+
+ Point selection = getViewer().getSelectedRange();
+ int topIndex = getViewer().getTopIndex();
+
+ StyledText styledText = getViewer().getTextWidget();
+ Control parent = styledText;
+ if (getViewer() instanceof ITextViewerExtension) {
+ ITextViewerExtension extension = (ITextViewerExtension) getViewer();
+ parent = extension.getControl();
+ }
+
+ parent.setRedraw(false);
+
+ styledText.setFont(font);
+
+ getViewer().setSelectedRange(selection.x, selection.y);
+ getViewer().setTopIndex(topIndex);
+
+ if (parent instanceof Composite) {
+ Composite composite = (Composite) parent;
+ composite.layout(true);
+ }
+
+ parent.setRedraw(true);
+
+ } else {
+ StyledText styledText = getViewer().getTextWidget();
+ styledText.setFont(font);
+ }
+ }
+
+ /**
+ * Sets the initial partition for the underlying source viewer.
+ *
+ * @param partition
+ * the partition type
+ */
+ public void setStartingPartitionType(String partition) {
+ if (partition == null)
+ fPartition = IDocument.DEFAULT_CONTENT_TYPE;
+ else
+ fPartition = partition;
+ }
+
+ /*
+ * @see org.eclipse.jface.text.IInformationControl#setInformation(java.lang.String)
+ */
+ public void setInformation(String content) {
+ super.setInformation(content);
+ IDocument doc = getViewer().getDocument();
+ if (doc == null)
+ return;
+
+ // ensure that we can scroll enough
+ ensureScrollable();
+
+ String start = null;
+ if (IPHPPartitions.PHP_PHPDOC_COMMENT.equals(fPartition)) {
+ start = "/**" + doc.getLegalLineDelimiters()[0]; //$NON-NLS-1$
+ } else if (IPHPPartitions.PHP_MULTILINE_COMMENT.equals(fPartition)) {
+ start = "/*" + doc.getLegalLineDelimiters()[0]; //$NON-NLS-1$
+ }
+ if (start != null) {
+ try {
+ doc.replace(0, 0, start);
+ int startLen = start.length();
+ getViewer().setDocument(doc, startLen,
+ doc.getLength() - startLen);
+ } catch (BadLocationException e) {
+ // impossible
+ Assert.isTrue(false);
+ }
+ }
+
+ getViewer().getTextWidget().setHorizontalPixel(fHorizontalScrollPixel);
+ }
+
+ /**
+ * Ensures that the control can be scrolled at least to
+ * <code>fHorizontalScrollPixel</code> and adjusts <code>fMaxWidth</code>
+ * accordingly.
+ */
+ private void ensureScrollable() {
+ IDocument doc = getViewer().getDocument();
+ if (doc == null)
+ return;
+
+ StyledText widget = getViewer().getTextWidget();
+ if (widget == null || widget.isDisposed())
+ return;
+
+ int last = doc.getNumberOfLines() - 1;
+ GC gc = new GC(widget);
+ gc.setFont(widget.getFont());
+ int maxWidth = 0;
+ String content = new String();
+
+ try {
+ for (int i = 0; i <= last; i++) {
+ IRegion line;
+ line = doc.getLineInformation(i);
+ content = doc.get(line.getOffset(), line.getLength());
+ int width = gc.textExtent(content).x;
+ if (width > maxWidth) {
+ maxWidth = width;
+ }
+ }
+ } catch (BadLocationException e) {
+ return;
+ } finally {
+ gc.dispose();
+ }
+
+ // limit the size of the window to the maximum width minus scrolling,
+ // but never more than the configured max size (viewport size).
+ fMaxWidth = Math.max(0, Math.min(fMaxWidth, maxWidth
+ - fHorizontalScrollPixel + 8));
+ }
+
+ /*
+ * @see net.sourceforge.phpdt.internal.ui.text.java.hover.SourceViewerInformationControl#hasContents()
+ */
+ public boolean hasContents() {
+ return super.hasContents() && fMaxWidth > 0;
+ }
+
+ /**
+ * Sets the horizontal scroll index in pixels.
+ *
+ * @param scrollIndex
+ * the new horizontal scroll index
+ */
+ public void setHorizontalScrollPixel(int scrollIndex) {
+ scrollIndex = Math.max(0, scrollIndex);
+ fHorizontalScrollPixel = scrollIndex;
+ }
+}
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