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/*
* Copyright (C) 2016 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class Range {
constructor(range) {
this.range = range;
}
text() {
return this.range.toString();
}
setLength(length) {
const node = this.range.startContainer;
const offset = this.range.startOffset;
length = Math.min(node.length - offset, length);
if (length === 0) {
return null;
}
range.setEnd(node, offset + length);
return length;
}
containsPoint(point) {
const rect = this.paddedRect();
return point.x >= rect.left && point.x <= rect.right;
}
paddedRect() {
const node = this.range.startContainer;
const startOffset = this.range.startOffset;
const endOffset = this.range.endOffset;
this.range.setStart(node, Math.max(0, startOffset - 1));
this.range.setEnd(node, Math.min(node.length, endOffset + 1));
const rect = range.getBoundingClientRect();
this.range.setStart(node, startOffset);
this.range.setEnd(node, endOffset);
return rect;
}
static fromPos(point) {
const range = document.caretRangeFromPoint(point.x, point.y);
return range === null ? null : new Range(range);
}
}
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