public void appendText(String text, long type) {
if (m_Text.isDisposed()) return;
// This is needed because the text control (on Windows) stores newlines
// as \r\n and selections and character counts will get out of synch if
// we
// work in the text control but reason about the text and they have
// different newlines.
// (We still use \n everywhere else as the newline marker because that's
// what Soar uses)
text = text.replaceAll(AbstractView.kLineSeparator, AbstractView.kSystemLineSeparator);
boolean show = true;
int recordIndex = -1;
if (m_FilteringEnabled) {
// Record the text in our master filter document.
// Also decide if we should show this particular line of text.
recordIndex = m_FilterDoc.addRecord(text, false, type);
show = m_FilterDoc.show(type);
}
if (show) {
appendTextInternal(text, false, recordIndex);
// Decide if we have caused the window to scroll or not
if (m_LastTopIndex != m_Text.getTopIndex()) {
scrolled();
m_LastTopIndex = m_Text.getTopIndex();
}
}
}
/**
* Runs a runnable, which executes some code. The top visible line number of the text field is
* remembered, and after the runnable has finished, the top visible line is restored is set to the
* remembered number.
*
* @param runnable
*/
protected void doTxfieldActionPreservingVisibleLines(final Runnable runnable, Text textfield) {
final Display display = textfield.getDisplay();
final int topIndex = textfield.getTopIndex();
runnable.run();
new Thread() {
@Override
public void run() {
try {
Thread.sleep(20);
} catch (InterruptedException e) {
LogUtil.logError(e);
}
Runnable r =
new Runnable() {
@Override
public void run() {
txtInputText.setTopIndex(topIndex);
}
};
display.syncExec(r);
};
}.start();
}
// Returns the line we clicked on based on mouse coordinates
public int getLine(int mouseY) {
int topLine = m_Text.getTopIndex();
int lineHeight = m_Text.getLineHeight();
int screenLine = mouseY / lineHeight;
int line = topLine + screenLine;
if (line > m_Text.getLineCount()) return -1;
return line;
}
/** Expand/contract all blocks currently on screen */
public void expandPage(boolean state) {
// Get all the information about which part of the text window is
// visible
int topLine = m_Text.getTopIndex();
int lineHeight = m_Text.getLineHeight();
int visibleLines = m_Text.getClientArea().height / lineHeight;
int lastLine = Math.min(m_Text.getLineCount(), m_Text.getTopIndex() + visibleLines);
boolean atBottom = (lastLine == m_Text.getLineCount());
// Start with the first block that starts at topLine or includes
// topLine.
Block topBlock = m_FoldingDoc.getBlockByLineNumber(topLine);
Block bottomBlock = m_FoldingDoc.getBlockByLineNumber(lastLine);
if (topBlock == null) return;
// Stop redrawing while we expand/collapse everything then turn it back
// on
setRedraw(false);
// If the lastLine is after the bottom block, use the last block in the
// document
if (bottomBlock == null)
bottomBlock = m_FoldingDoc.getBlock(m_FoldingDoc.getNumberBlocks() - 1);
int topIndex = topBlock.getIndex();
int bottomIndex = bottomBlock.getIndex();
for (int i = topIndex; i <= bottomIndex; i++) {
Block block = m_FoldingDoc.getBlock(i);
m_FoldingDoc.expandBlock(block, state);
}
// If the selection was set to the bottom before we expanded make sure
// it stays there after the expansion.
if (state && atBottom) scrollBottom();
// Redraw everything
setRedraw(true);
}
protected void iconBarMouseClick(MouseEvent e) {
// Make sure the text control is properly initialized
if (m_Text.getLineHeight() == 0) return;
int topLine = m_Text.getTopIndex();
int lineHeight = m_Text.getLineHeight();
int line = (e.y / lineHeight) + topLine;
// By using the "getBlockByLineNumber" method we get either the start
// of a block or the block that encloses this line.
// This means that clicking on the line beneath an expanded block will
// cause it to collapse. I think that's a nice feature, but if we'd
// rather
// not have that happen switch this to getBlockStartsAtLineNumber() and
// only clicks right on the icon will cause behavior.
Block block = m_FoldingDoc.getBlockByLineNumber(line);
if (block == null) return;
m_FoldingDoc.expandBlock(block, !block.isExpanded());
m_IconBar.redraw();
}
public FoldingText(Composite parent) {
m_Container = new Composite(parent, 0);
// The icon bar is used to paint the "+" signs. It is double-buffered or
// we'll get a little flicker effect because we repaint it on a timer.
m_IconBar = new Canvas(m_Container, SWT.DOUBLE_BUFFERED);
m_Text = new Text(m_Container, SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL | SWT.READ_ONLY);
m_DrawingDisabled = false;
GridLayout layout = new GridLayout();
layout.numColumns = 2;
m_Container.setLayout(layout);
GridData data1 = new GridData(GridData.FILL_VERTICAL);
data1.widthHint = 13;
m_IconBar.setLayoutData(data1);
GridData data2 = new GridData(GridData.FILL_BOTH);
m_Text.setLayoutData(data2);
m_IconBar.addPaintListener(
new PaintListener() {
public void paintControl(PaintEvent e) {
paintIcons(e);
}
});
m_IconBar.setBackground(m_IconBar.getDisplay().getSystemColor(SWT.COLOR_WHITE));
m_IconBar.addMouseListener(
new MouseAdapter() {
public void mouseUp(MouseEvent e) {
iconBarMouseClick(e);
}
});
// Think we'll need this so we update the icons while we're scrolling
m_Text
.getVerticalBar()
.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
scrolled();
}
});
// The user can trigger a scroll in the text window in other ways than
// grabbing the scroll bar thumb and moving it so we
// need to detect those too.
Listener listener =
new Listener() {
int lastIndex = m_Text.getTopIndex();
public void handleEvent(Event e) {
int index = m_Text.getTopIndex();
if (index != lastIndex) {
lastIndex = index;
scrolled();
}
}
};
// NOTE: Only detects scrolling by the user and not quite correct if you
// drag out of the window
// (This code came from the SWT web site itself)
m_Text.addListener(SWT.MouseDown, listener);
m_Text.addListener(SWT.MouseMove, listener);
m_Text.addListener(SWT.MouseUp, listener);
m_Text.addListener(SWT.KeyDown, listener);
m_Text.addListener(SWT.KeyUp, listener);
m_Text.addListener(SWT.Resize, listener);
// Because the above tests aren't always correct we'll also use a timer
// to redraw the icon bar
// at a slow rate. This ensures the icons are correct after the delay
// has passed in all cases.
// (We're using a slow timer rather than calling redraw after each line
// of text is added, for instance,
// to boost overall performance). In practice this timer is correcting a
// minor cosmetic issue so it's
// not worth trading real performance for.
periodicRepaint(500);
m_LastTopIndex = m_Text.getTopIndex();
}
protected void paintIcons(PaintEvent e) {
// Check if we've turned off redraws
if (m_DrawingDisabled) return;
GC gc = e.gc;
Rectangle client = m_IconBar.getClientArea();
// Make sure the text control is properly initialized
if (m_Text.getLineHeight() == 0) return;
// Get all the information about which part of the text window is
// visible
int topLine = m_Text.getTopIndex();
int lineHeight = m_Text.getLineHeight();
int visibleLines = m_Text.getClientArea().height / lineHeight;
int lastLine = Math.min(m_Text.getLineCount(), m_Text.getTopIndex() + visibleLines);
// Start with the first block that starts at topLine or includes
// topLine.
Block topBlock = m_FoldingDoc.getBlockByLineNumber(topLine);
int blockCount = m_FoldingDoc.getNumberBlocks();
if (topBlock == null) return;
int blockIndex = topBlock.getIndex();
int outerSize = 9;
int innerSize = 6;
int offset = (outerSize - innerSize) / 2 + 1;
Color gray = m_IconBar.getDisplay().getSystemColor(SWT.COLOR_GRAY);
Color black = m_IconBar.getDisplay().getSystemColor(SWT.COLOR_BLACK);
// Go through each block in turn until we're off the bottom of the
// screen
// or at the end of the list of blocks drawing icons
while (blockIndex != -1 && blockIndex < blockCount) {
Block block = m_FoldingDoc.getBlock(blockIndex);
int line = block.getStart();
// Once we drop off the bottom of the screen we're done
if (line >= lastLine) break;
int pos = line - topLine;
int y = pos * lineHeight + (lineHeight / 2) - (outerSize / 2) - 1;
int x = 1;
boolean expanded = block.isExpanded();
if (block.canExpand()) {
gc.drawRectangle(x, y, x + outerSize, x + outerSize);
// Start with a - sign
int y1 = y + 1 + (outerSize / 2);
gc.drawLine(x + offset, y1, x + offset + innerSize, y1);
if (!expanded) {
// If not expanded turn the - into a +
int x1 = x + 1 + (outerSize / 2);
gc.drawLine(x1, y + offset, x1, y + offset + innerSize);
} else {
// If expanded draw a line to show what is in the expanded
// area
gc.setForeground(gray);
int x1 = x + 1 + (outerSize / 2);
int yTop = y + outerSize + 2;
int yBottom = y + ((block.getSize() - 1) * lineHeight) + (outerSize / 2);
gc.drawLine(x1, yTop, x1, yBottom);
gc.drawLine(x1, yBottom, client.width - 1, yBottom);
gc.setForeground(black);
}
}
blockIndex++;
}
}
protected void appendSubTextInternal(String text, boolean autoExpand, int recordIndex) {
Block last = m_FoldingDoc.m_LastBlock;
if (last == null) {
// This is an odd situation where we're adding subtext but have no
// supertext to append to.
// It probably will never occur, but if it does we'll add a blank
// super text block just
// to get us going.
last = new Block(true, recordIndex);
last.appendLine("");
last.setExpand(autoExpand);
m_FoldingDoc.addBlock(last);
appendTextToWidget(m_Text, "");
m_IconBar.redraw();
}
if (!last.canExpand()) {
// Need to remove the last line from the block and move it to a new
// block
// which can expand and then proceed with the addition to this new
// block
// Thus we ensure that "canExpand" items have at least one child.
int size = last.getSize();
if (size == 1) {
// If the last block only contains exactly one line we can
// convert it safely
// to a block which does expand. This way we also preserve the
// "all blocks contain
// at least one line" rule which makes the code simpler.
last.setCanExpand(true);
last.setExpand(autoExpand);
} else if (size > 1) {
// NOTE: Blocks should always have at least one line so these
// calls
// should never fail (if they do it's a programming error
// somewhere else that
// allowed an empty block to be created).
String lastLine = last.getLastLine();
last.removeLastLine();
last = new Block(true, recordIndex);
last.appendLine(lastLine);
last.setExpand(autoExpand);
m_FoldingDoc.addBlock(last);
} else if (size == 0) {
throw new IllegalStateException("Last block should not be empty");
}
// There's no change to the text sprite (because the line is just
// moved between logical blocks)
// but we will need to draw the icons to show there's a new block.
m_IconBar.redraw();
}
last.appendLine(text);
if (last.isExpanded()) {
appendTextToWidget(m_Text, text);
// Decide if we have caused the window to scroll or not
if (!autoExpand && (m_LastTopIndex != m_Text.getTopIndex())) {
scrolled();
m_LastTopIndex = m_Text.getTopIndex();
}
}
}
