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abstract-textfield.js
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abstract-textfield.js
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//heavilly inspired by https://raw.githubusercontent.com/barmalei/zebra/8adb4a7a5d831447d9d5dd5958efaccd2e7eaf53/src/ui.TextField.js
function AbstractTextField(){
}
AbstractTextField.prototype = new function(){
this.findNextWord = function(t, line, col, d){
if (line < 0 || line >= t.getLines()) return null;
var ln = t.getLine(line);
col += d;
if (col < 0 && line > 0) {
return [line - 1, t.getLine(line - 1).length];
}
else {
if (col > ln.length && line < t.getLines() - 1) return [line + 1, 0];
}
var b = false;
for(; col >= 0 && col < ln.length; col += d){
if (b) {
if (d > 0) {
if (zebra.util.isLetter(ln[col])) return [line, col];
}
else {
if (!zebra.util.isLetter(ln[col])) return [line, col + 1];
}
}
else {
b = d > 0 ? !zebra.util.isLetter(ln[col]) : zebra.util.isLetter(ln[col]);
}
}
return (d > 0 ? [line, ln.length ]: [line, 0]);
};
this.getSubString = function(r,start,end){
var res = [], sr = start[0], er = end[0], sc = start[1], ec = end[1];
for(var i = sr; i < er + 1; i++){
var ln = r.getLine(i);
if (i != sr) res.push('\n');
else ln = ln.substring(sc);
if (i == er) ln = ln.substring(0, ec - ((sr == er) ? sc : 0));
res.push(ln);
}
return res.join('');
};
this.removeSelected = function(){
if (this.hasSelection()){
var start = this.selectionStart < this.selectionEnd ? this.selectionStart : this.selectionEnd;
this.remove(start, (this.selectionStart > this.selectionEnd ? this.selectionStart : this.selectionEnd) - start);
this.clearSelection();
}
};
this.startSelection = function() {
if (this.selectionStart < 0 && this.position != null){
var pos = this.position;
this.endLine = this.startLine = pos.currentLine;
this.endCol = this.startCol = pos.currentCol;
this.selectionEnd = this.selectionStart = pos.offset;
}
};
this.keyTyped = function(e) {
if (this.isEditable === true && e.isControlPressed() == false && e.isCmdPressed() == false) {
this.write(this.position.offset, e.ch);
}
};
this.selectAll_command = function() {
this.select(0, this.getMaxOffset());
};
this.nextWord_command = function(b, d) {
if (b) this.startSelection();
var p = this.findNextWord(this.view.target, this.position.currentLine,
this.position.currentCol, d);
if (p != null) {
this.position.setRowCol(p[0], p[1]);
}
};
this.keyPressed = function(e) {
if (this.isFiltered(e) === false) {
var position = this.position,
col = position.currentCol,
isShiftDown = e.isShiftPressed(),
line = position.currentLine,
foff = 1;
if (isShiftDown) {
this.startSelection();
}
switch(e.code) {
case KE.DOWN : position.seekLineTo(PO.DOWN);break;
case KE.UP : position.seekLineTo(PO.UP);break;
case KE.LEFT : foff *= -1;
case KE.RIGHT:
if (e.isControlPressed() === false && e.isCmdPressed() === false) {
position.seek(foff);
}
break;
case KE.END:
if (e.isControlPressed()) {
position.seekLineTo(PO.DOWN, this.getLines() - line - 1);
}
else position.seekLineTo(PO.END);
break;
case KE.HOME:
if (e.isControlPressed()) position.seekLineTo(PO.UP, line);
else position.seekLineTo(PO.BEG);
break;
case KE.DELETE:
if (this.hasSelection() && this.isEditable === true) {
this.removeSelected();
}
else {
if (this.isEditable === true) this.remove(position.offset, 1);
} break;
case KE.BSPACE:
if (this.isEditable === true) {
if (this.hasSelection()) this.removeSelected();
else {
if (this.isEditable === true && position.offset > 0){
position.seek(-1 * foff);
this.remove(position.offset, 1);
}
}
} break;
default: return ;
}
if (isShiftDown === false) {
this.clearSelection();
}
}
};
this.isFiltered = function(e){
var code = e.code;
return code == KE.CTRL ||
code == KE.TAB || code == KE.ALT ||
(e.mask & KE.M_ALT) > 0;
};
this.remove = function (pos,size){
if (this.isEditable === true) {
var position = this.position;
if (pos >= 0 && (pos + size) <= this.getMaxOffset()) {
if (size < 10000) {
this.historyPos = (this.historyPos + 1) % this.history.length;
this.history[this.historyPos] = [-1, pos, this.getValue().substring(pos, pos+size)];
if (this.undoCounter < this.history.length) this.undoCounter++;
}
if (this.view.target.remove(pos, size)) {
return true;
}
}
}
return false;
};
this.write = function (pos,s) {
if (this.isEditable === true) {
// TODO: remove hard coded undo/redo deepness value
if (s.length < 10000) {
this.historyPos = (this.historyPos + 1) % this.history.length;
this.history[this.historyPos] = [1, pos, s.length];
if (this.undoCounter < this.history.length) this.undoCounter++;
}
if (this.view.target.write(s, pos)) {
return true;
}
}
return false;
};
this.recalc = function() {
var r = this.view;
if (this.position.offset >= 0) {
var l = r.getLine(this.position.currentLine);
if (this.textAlign === zebra.layout.LEFT) {
this.curX = r.font.charsWidth(l, 0, this.position.currentCol) + this.getLeft();
}
else {
this.curX = this.width - this.getRight() - this.view.getPreferredSize().width +
r.font.charsWidth(l, 0, this.position.currentCol);
}
this.curY = this.position.currentLine * (r.getLineHeight() + r.getLineIndent()) +
this.getTop();
}
this.curH = r.getLineHeight() - 1;
};
this.select = function (startOffset,endOffset){
if (endOffset < startOffset || startOffset < 0 || endOffset > this.getMaxOffset()) {
throw new Error("Invalid selection offsets");
}
if (this.selectionStart != startOffset || endOffset != this.selectionEnd){
if (startOffset == endOffset) this.clearSelection();
else {
this.selectionStart = startOffset;
var p = this.position.getPointByOffset(startOffset);
this.startLine = p[0];
this.startCol = p[1];
this.selectionEnd = endOffset;
p = this.position.getPointByOffset(endOffset);
this.endLine = p[0];
this.endCol = p[1];
}
}
};
this.hasSelection = function () {
return this.selectionStart != this.selectionEnd;
};
this.getStartSelection = function(){
return this.selectionStart != this.selectionEnd ? ((this.selectionStart < this.selectionEnd) ? [this.startLine, this.startCol] : [this.endLine, this.endCol]) : null;
};
this.getEndSelection = function(){
return this.selectionStart != this.selectionEnd ? ((this.selectionStart < this.selectionEnd) ? [this.endLine, this.endCol] : [this.startLine, this.startCol]) : null;
};
this.getSelectedText = function(){
return this.selectionStart != this.selectionEnd ? this.getSubString(this.view, this.getStartSelection(), this.getEndSelection()) : null;
};
this.getLines = function() {
return this.position == null ? -1 : this.position.metrics.getLines();
};
this.getMaxOffset = function() {
return this.position == null ? -1 : this.position.metrics.getMaxOffset();
};
this.clearSelection = function (){
if (this.selectionStart >= 0){
var b = this.hasSelection();
this.selectionEnd = this.selectionStart = -1;
}
};
this.clipPaste = function(txt){
if (txt != null){
this.removeSelected();
this.write(this.position.offset, txt);
}
};
this.clipCopy = function() {
return this.getSelectedText();
};
this.cut = function() {
var t = this.getSelectedText();
if (this.isEditable === true) this.removeSelected();
return t;
};
this.setPosition = function (p){
if (this.position != p) {
if (this.position != null) {
this.position.unbind(this);
}
this.position = p;
if (this.position != null) {
this.position.bind(this);
}
this.invalidate();
}
};
}

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abstract-textfield.js (7 KB)

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