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Some selection tests.

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Alex Yatskov 2016-03-19 19:02:58 -07:00
parent 3fd7ab16ac
commit 0eeacbf5c8
1 changed files with 36 additions and 33 deletions
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content.js
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@ -1,50 +1,53 @@
/*
* Copyright (c) 2016 Alex Yatskov <alex@foosoft.net>
* Copyright (C) 2016 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
* 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.
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
function insertBreakAtPoint(e) {
var range;
var textNode;
var offset;
if (document.caretPositionFromPoint) {
range = document.caretPositionFromPoint(e.clientX, e.clientY);
textNode = range.offsetNode;
offset = range.offset;
} else if (document.caretRangeFromPoint) {
range = document.caretRangeFromPoint(e.clientX, e.clientY);
textNode = range.startContainer;
offset = range.startOffset;
function getRangeAtCursor(e, lookAhead) {
const range = document.caretRangeFromPoint(e.clientX, e.clientY);
if (range === null) {
return null
}
// only split TEXT_NODEs
if (textNode.nodeType == 3) {
var replacement = textNode.splitText(offset);
var br = document.createElement('br');
textNode.parentNode.insertBefore(br, replacement);
const node = range.startContainer;
if (node.nodeType !== 3 /* TEXT_NODE */) {
return null;
}
const offset = range.startOffset;
const length = Math.min(node.length - offset, lookAhead);
range.setEnd(node, offset + length);
return range;
}
function onMouseDown(e) {
insertBreakAtPoint(e);
const range = getRangeAtCursor(e, 20);
if (range === null) {
return;
}
const selection = window.getSelection();
selection.removeAllRanges();
selection.addRange(range);
e.preventDefault();
console.log(range.toString());
}