/** Clear any styles applied to the selected text. */
public void clearSelectionStyle() {
if (!hasSelection()) return;
TextLayoutHitInfo startSelTLHI;
TextLayoutHitInfo endSelTLHI;
if (endTLHI.compareTo(startTLHI) == -1) {
startSelTLHI = endTLHI;
endSelTLHI = startTLHI;
} else {
startSelTLHI = startTLHI;
endSelTLHI = endTLHI;
}
int ss = startSelTLHI.tli.startCharIndex + startSelTLHI.thi.getInsertionIndex();
int ee = endSelTLHI.tli.startCharIndex + endSelTLHI.thi.getInsertionIndex();
stext.clearAttributes(ss, ee);
// We have modified the text style so the end of the selection may have
// moved, so it needs to be recalculated. The start will be unaffected.
stext.getLines(buffer.g2);
endSelTLHI.tli = stext.getTLIforCharNo(ee);
int cn = ee - endSelTLHI.tli.startCharIndex;
if (cn == 0) // start of line
endSelTLHI.thi = endSelTLHI.tli.layout.getNextLeftHit(1);
else endSelTLHI.thi = endSelTLHI.tli.layout.getNextRightHit(cn - 1);
bufferInvalid = true;
}
/**
* Move caret right by one character.
*
* @param currPos the current position of the caret
* @return true if caret moved else false
*/
protected boolean moveCaretRight(TextLayoutHitInfo currPos) {
TextHitInfo nthi = currPos.tli.layout.getNextRightHit(currPos.thi);
if (nthi == null) {
return false;
} else {
currPos.thi = nthi;
}
return true;
}
/**
* Move caret left by one character.
*
* @param currPos the current position of the caret
* @return true if caret moved else false
*/
protected boolean moveCaretLeft(TextLayoutHitInfo currPos) {
TextHitInfo nthi = currPos.tli.layout.getNextLeftHit(currPos.thi);
if (nthi == null) {
return false;
} else {
// Move the caret to the left of current position
currPos.thi = nthi;
}
return true;
}
/**
* Load the styled string to be used by this control. <br>
* It will also restore any text selection saved with the text.
*
* @param fname the name of the file to use
* @return true if loaded successfully else false
*/
public boolean loadText(String fname) {
StyledString ss = StyledString.load(winApp, fname);
if (ss == null) return false;
setStyledText(ss);
// Now restore any text selection
if (stext.startIdx >= 0) { // we have a selection
// Selection starts at ...
startTLHI = new TextLayoutHitInfo();
startTLHI.tli = stext.getTLIforCharNo(stext.startIdx);
int pInLayout = stext.startIdx - startTLHI.tli.startCharIndex;
if (pInLayout == 0) startTLHI.thi = startTLHI.tli.layout.getNextLeftHit(1);
else startTLHI.thi = startTLHI.tli.layout.getNextRightHit(pInLayout - 1);
// Selection ends at ...
endTLHI = new TextLayoutHitInfo();
endTLHI.tli = stext.getTLIforCharNo(stext.endIdx);
pInLayout = stext.endIdx - endTLHI.tli.startCharIndex;
if (pInLayout == 0) endTLHI.thi = endTLHI.tli.layout.getNextLeftHit(1);
else endTLHI.thi = endTLHI.tli.layout.getNextRightHit(pInLayout - 1);
calculateCaretPos(endTLHI);
}
bufferInvalid = true;
return true;
}
/**
* Determines whether this component is to have focus or not. <br>
* Fire focus events for the GTextField and GTextArea controls
*
* @param focus
*/
public void setFocus(boolean focus) {
if (!focus) {
loseFocus(null);
return;
}
// Make sure we have some text
if (focusIsWith != this) {
dragging = false;
if (stext == null || stext.length() == 0) stext = new StyledString(" ", wrapWidth);
// text = stext.getPlainText();
LinkedList<TextLayoutInfo> lines = stext.getLines(buffer.g2);
startTLHI = new TextLayoutHitInfo(lines.getFirst(), null);
startTLHI.thi = startTLHI.tli.layout.getNextLeftHit(1);
endTLHI = new TextLayoutHitInfo(lines.getLast(), null);
int lastChar = endTLHI.tli.layout.getCharacterCount();
endTLHI.thi = startTLHI.tli.layout.getNextRightHit(lastChar - 1);
calculateCaretPos(endTLHI);
bufferInvalid = true;
}
keepCursorInView = true;
takeFocus();
}
/**
* Move caret to the end of the line that has the current caret position
*
* @param currPos the current position of the caret
* @return true if caret moved else false
*/
protected boolean moveCaretEndOfLine(TextLayoutHitInfo currPos) {
if (currPos.thi.getCharIndex() == currPos.tli.nbrChars - 1)
return false; // already at end of line
currPos.thi = currPos.tli.layout.getNextRightHit(currPos.tli.nbrChars - 1);
return true;
}
/**
* Move caret to home position
*
* @param currPos the current position of the caret
* @return true if caret moved else false
*/
protected boolean moveCaretStartOfLine(TextLayoutHitInfo currPos) {
if (currPos.thi.getCharIndex() == 0) return false; // already at start of line
currPos.thi = currPos.tli.layout.getNextLeftHit(1);
return true;
}