/** 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;
}
// Only executed if text has changed
protected boolean changeText() {
TextLayoutInfo tli;
TextHitInfo thi = null, thiRight = null;
pos += adjust;
// Force layouts to be updated
stext.getLines(buffer.g2);
// Try to get text layout info for the current position
tli = stext.getTLIforCharNo(pos);
if (tli == null) {
// If unable to get a layout for pos then reset everything
endTLHI = null;
startTLHI = null;
ptx = pty = 0;
caretX = caretY = 0;
return false;
}
// We have a text layout so we can do something
// First find the position in line
int posInLine = pos - tli.startCharIndex;
// Get some hit info so we can see what is happening
try {
thiRight = tli.layout.getNextRightHit(posInLine);
} catch (Exception excp) {
thiRight = null;
}
if (posInLine <= 0) { // At start of line
thi = tli.layout.getNextLeftHit(thiRight);
} else if (posInLine >= tli.nbrChars) { // End of line
thi = tli.layout.getNextRightHit(tli.nbrChars - 1);
} else { // Character in line;
thi = tli.layout.getNextLeftHit(thiRight);
}
endTLHI.setInfo(tli, thi);
// Cursor at end of paragraph graphic
calculateCaretPos(endTLHI);
// // Is do we have to move cursor to start of next line
// if(newline) {
// if(pos >= stext.length()){
// stext.insertCharacters(pos, " ");
// stext.getLines(buffer.g2);
// }
// moveCaretRight(endTLHI);
// calculateCaretPos(endTLHI);
// }
// // Finish off by ensuring no selection, invalidate buffer etc.
// startTLHI.copyFrom(endTLHI);
// }
bufferInvalid = true;
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;
}
/**
* 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();
}
/**
* Get the text that has been selected (highlighted) by the user. <br>
*
* @return the selected text without styling
*/
public String getSelectedText() {
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();
String s = stext.getPlainText().substring(ss, ee);
return s;
}
/**
* 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;
}
/**
* Find out if some text is selected (highlighted)
*
* @return true if some text is selected else false
*/
public boolean hasSelection() {
return (startTLHI.tli != null && endTLHI.tli != null && startTLHI.compareTo(endTLHI) != 0);
}
/**
* 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;
}