/**
* Determines the model location that represents the maximum advance that fits within the given
* span. This could be used to break the given view. The result should be a location just shy of
* the given advance. This differs from viewToModel which returns the closest position which might
* be proud of the maximum advance.
*
* @param v the view to find the model location to break at.
* @param p0 the location in the model where the fragment should start it's representation >= 0.
* @param pos the graphic location along the axis that the broken view would occupy >= 0. This may
* be useful for things like tab calculations.
* @param len specifies the distance into the view where a potential break is desired >= 0.
* @return the maximum model location possible for a break.
* @see View#breakView
*/
public int getBoundedPosition(GlyphView v, int p0, float x, float len) {
if (len < 0) throw new IllegalArgumentException("Length must be >= 0.");
// note: this only works because swing uses TextLayouts that are
// only pure rtl or pure ltr
TextHitInfo hit;
if (layout.isLeftToRight()) {
hit = layout.hitTestChar(len, 0);
} else {
hit = layout.hitTestChar(layout.getAdvance() - len, 0);
}
return v.getStartOffset() + hit.getCharIndex();
}
/**
* Provides a mapping from the view coordinate space to the logical coordinate space of the model.
*
* @param v the view containing the view coordinates
* @param x the X coordinate
* @param y the Y coordinate
* @param a the allocated region to render into
* @param biasReturn either <code>Position.Bias.Forward</code> or <code>Position.Bias.Backward
* </code> is returned as the zero-th element of this array
* @return the location within the model that best represents the given point of view
* @see View#viewToModel
*/
public int viewToModel(GlyphView v, float x, float y, Shape a, Position.Bias[] biasReturn) {
Rectangle2D alloc = (a instanceof Rectangle2D) ? (Rectangle2D) a : a.getBounds2D();
// Move the y co-ord of the hit onto the baseline. This is because TextLayout supports
// italic carets and we do not.
TextHitInfo hit = layout.hitTestChar(x - (float) alloc.getX(), 0);
int pos = hit.getInsertionIndex();
if (pos == v.getEndOffset()) {
pos--;
}
biasReturn[0] = hit.isLeadingEdge() ? Position.Bias.Forward : Position.Bias.Backward;
return pos + v.getStartOffset();
}
public Shape modelToView(GlyphView v, int pos, Position.Bias bias, Shape a)
throws BadLocationException {
int offs = pos - v.getStartOffset();
Rectangle2D alloc = a.getBounds2D();
TextHitInfo hit =
(bias == Position.Bias.Forward)
? TextHitInfo.afterOffset(offs)
: TextHitInfo.beforeOffset(offs);
float[] locs = layout.getCaretInfo(hit);
// vertical at the baseline, should use slope and check if glyphs
// are being rendered vertically.
alloc.setRect(alloc.getX() + locs[0], alloc.getY(), 1, alloc.getHeight());
return alloc;
}
/**
* Determine the span the glyphs given a start location (for tab expansion). This implementation
* assumes it has no tabs (i.e. TextLayout doesn't deal with tab expansion).
*/
public float getSpan(GlyphView v, int p0, int p1, TabExpander e, float x) {
if ((p0 == v.getStartOffset()) && (p1 == v.getEndOffset())) {
return layout.getAdvance();
}
int p = v.getStartOffset();
int index0 = p0 - p;
int index1 = p1 - p;
TextHitInfo hit0 = TextHitInfo.afterOffset(index0);
TextHitInfo hit1 = TextHitInfo.beforeOffset(index1);
float[] locs = layout.getCaretInfo(hit0);
float x0 = locs[0];
locs = layout.getCaretInfo(hit1);
float x1 = locs[0];
return (x1 > x0) ? x1 - x0 : x0 - x1;
}
public void sendInputMethodEvent(
int id,
long when,
String text,
int[] clauseBoundary,
String[] clauseReading,
int[] attributeBoundary,
byte[] attributeValue,
int commitedTextLength,
int caretPos,
int visiblePos) {
AttributedCharacterIterator iterator = null;
if (text != null) {
// construct AttributedString
AttributedString attrStr = new AttributedString(text);
// set Language Information
attrStr.addAttribute(Attribute.LANGUAGE, Locale.getDefault(), 0, text.length());
// set Clause and Reading Information
if (clauseBoundary != null
&& clauseReading != null
&& clauseReading.length != 0
&& clauseBoundary.length == clauseReading.length + 1
&& clauseBoundary[0] == 0
&& clauseBoundary[clauseReading.length] == text.length()) {
for (int i = 0; i < clauseBoundary.length - 1; i++) {
attrStr.addAttribute(
Attribute.INPUT_METHOD_SEGMENT,
new Annotation(null),
clauseBoundary[i],
clauseBoundary[i + 1]);
attrStr.addAttribute(
Attribute.READING,
new Annotation(clauseReading[i]),
clauseBoundary[i],
clauseBoundary[i + 1]);
}
} else {
// if (clauseBoundary != null)
// System.out.println("Invalid clause information!");
attrStr.addAttribute(
Attribute.INPUT_METHOD_SEGMENT, new Annotation(null), 0, text.length());
attrStr.addAttribute(Attribute.READING, new Annotation(""), 0, text.length());
}
// set Hilight Information
if (attributeBoundary != null
&& attributeValue != null
&& attributeValue.length != 0
&& attributeBoundary.length == attributeValue.length + 1
&& attributeBoundary[0] == 0
&& attributeBoundary[attributeValue.length] == text.length()) {
for (int i = 0; i < attributeBoundary.length - 1; i++) {
InputMethodHighlight highlight;
switch (attributeValue[i]) {
case ATTR_TARGET_CONVERTED:
highlight = InputMethodHighlight.SELECTED_CONVERTED_TEXT_HIGHLIGHT;
break;
case ATTR_CONVERTED:
highlight = InputMethodHighlight.UNSELECTED_CONVERTED_TEXT_HIGHLIGHT;
break;
case ATTR_TARGET_NOTCONVERTED:
highlight = InputMethodHighlight.SELECTED_RAW_TEXT_HIGHLIGHT;
break;
case ATTR_INPUT:
case ATTR_INPUT_ERROR:
default:
highlight = InputMethodHighlight.UNSELECTED_RAW_TEXT_HIGHLIGHT;
break;
}
attrStr.addAttribute(
TextAttribute.INPUT_METHOD_HIGHLIGHT,
highlight,
attributeBoundary[i],
attributeBoundary[i + 1]);
}
} else {
// if (attributeBoundary != null)
// System.out.println("Invalid attribute information!");
attrStr.addAttribute(
TextAttribute.INPUT_METHOD_HIGHLIGHT,
InputMethodHighlight.UNSELECTED_CONVERTED_TEXT_HIGHLIGHT,
0,
text.length());
}
// get iterator
iterator = attrStr.getIterator();
}
Component source = getClientComponent();
if (source == null) return;
InputMethodEvent event =
new InputMethodEvent(
source,
id,
when,
iterator,
commitedTextLength,
TextHitInfo.leading(caretPos),
TextHitInfo.leading(visiblePos));
WToolkit.postEvent(WToolkit.targetToAppContext(source), event);
}
/**
* Provides a way to determine the next visually represented model location that one might place a
* caret. Some views may not be visible, they might not be in the same order found in the model,
* or they just might not allow access to some of the locations in the model.
*
* @param v the view to use
* @param pos the position to convert >= 0
* @param a the allocated region to render into
* @param direction the direction from the current position that can be thought of as the arrow
* keys typically found on a keyboard. This may be SwingConstants.WEST, SwingConstants.EAST,
* SwingConstants.NORTH, or SwingConstants.SOUTH.
* @return the location within the model that best represents the next location visual position.
* @exception BadLocationException
* @exception IllegalArgumentException for an invalid direction
*/
public int getNextVisualPositionFrom(
GlyphView v, int pos, Position.Bias b, Shape a, int direction, Position.Bias[] biasRet)
throws BadLocationException {
int startOffset = v.getStartOffset();
int endOffset = v.getEndOffset();
Segment text;
AbstractDocument doc;
boolean viewIsLeftToRight;
TextHitInfo currentHit, nextHit;
switch (direction) {
case View.NORTH:
break;
case View.SOUTH:
break;
case View.EAST:
doc = (AbstractDocument) v.getDocument();
viewIsLeftToRight = doc.isLeftToRight(startOffset, endOffset);
if (startOffset == doc.getLength()) {
if (pos == -1) {
biasRet[0] = Position.Bias.Forward;
return startOffset;
}
// End case for bidi text where newline is at beginning
// of line.
return -1;
}
if (pos == -1) {
// Entering view from the left.
if (viewIsLeftToRight) {
biasRet[0] = Position.Bias.Forward;
return startOffset;
} else {
text = v.getText(endOffset - 1, endOffset);
char c = text.array[text.offset];
SegmentCache.releaseSharedSegment(text);
if (c == '\n') {
biasRet[0] = Position.Bias.Forward;
return endOffset - 1;
}
biasRet[0] = Position.Bias.Backward;
return endOffset;
}
}
if (b == Position.Bias.Forward) currentHit = TextHitInfo.afterOffset(pos - startOffset);
else currentHit = TextHitInfo.beforeOffset(pos - startOffset);
nextHit = layout.getNextRightHit(currentHit);
if (nextHit == null) {
return -1;
}
if (viewIsLeftToRight != layout.isLeftToRight()) {
// If the layout's base direction is different from
// this view's run direction, we need to use the weak
// carrat.
nextHit = layout.getVisualOtherHit(nextHit);
}
pos = nextHit.getInsertionIndex() + startOffset;
if (pos == endOffset) {
// A move to the right from an internal position will
// only take us to the endOffset in a left to right run.
text = v.getText(endOffset - 1, endOffset);
char c = text.array[text.offset];
SegmentCache.releaseSharedSegment(text);
if (c == '\n') {
return -1;
}
biasRet[0] = Position.Bias.Backward;
} else {
biasRet[0] = Position.Bias.Forward;
}
return pos;
case View.WEST:
doc = (AbstractDocument) v.getDocument();
viewIsLeftToRight = doc.isLeftToRight(startOffset, endOffset);
if (startOffset == doc.getLength()) {
if (pos == -1) {
biasRet[0] = Position.Bias.Forward;
return startOffset;
}
// End case for bidi text where newline is at beginning
// of line.
return -1;
}
if (pos == -1) {
// Entering view from the right
if (viewIsLeftToRight) {
text = v.getText(endOffset - 1, endOffset);
char c = text.array[text.offset];
SegmentCache.releaseSharedSegment(text);
if ((c == '\n') || Character.isSpaceChar(c)) {
biasRet[0] = Position.Bias.Forward;
return endOffset - 1;
}
biasRet[0] = Position.Bias.Backward;
return endOffset;
} else {
biasRet[0] = Position.Bias.Forward;
return startOffset;
}
}
if (b == Position.Bias.Forward) currentHit = TextHitInfo.afterOffset(pos - startOffset);
else currentHit = TextHitInfo.beforeOffset(pos - startOffset);
nextHit = layout.getNextLeftHit(currentHit);
if (nextHit == null) {
return -1;
}
if (viewIsLeftToRight != layout.isLeftToRight()) {
// If the layout's base direction is different from
// this view's run direction, we need to use the weak
// carrat.
nextHit = layout.getVisualOtherHit(nextHit);
}
pos = nextHit.getInsertionIndex() + startOffset;
if (pos == endOffset) {
// A move to the left from an internal position will
// only take us to the endOffset in a right to left run.
text = v.getText(endOffset - 1, endOffset);
char c = text.array[text.offset];
SegmentCache.releaseSharedSegment(text);
if (c == '\n') {
return -1;
}
biasRet[0] = Position.Bias.Backward;
} else {
biasRet[0] = Position.Bias.Forward;
}
return pos;
default:
throw new IllegalArgumentException("Bad direction: " + direction);
}
return pos;
}
