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-rw-r--r--ext/fg/js/source-range.js176
1 files changed, 0 insertions, 176 deletions
diff --git a/ext/fg/js/source-range.js b/ext/fg/js/source-range.js
deleted file mode 100644
index fa73b0a4..00000000
--- a/ext/fg/js/source-range.js
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- * 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 TextSourceRange {
- constructor(range, content='') {
- this.range = range;
- this.content = content;
- }
-
- clone() {
- return new TextSourceRange(this.range.cloneRange(), this.content);
- }
-
- text() {
- return this.content;
- }
-
- setEndOffset(length) {
- const state = TextSourceRange.seekForward(this.range.startContainer, this.range.startOffset, length);
- this.range.setEnd(state.node, state.offset);
- this.content = state.content;
- return length - state.remainder;
- }
-
- setStartOffset(length) {
- const state = TextSourceRange.seekBackward(this.range.startContainer, this.range.startOffset, length);
- this.range.setStart(state.node, state.offset);
- this.content = state.content;
- return length - state.remainder;
- }
-
- containsPoint(point) {
- const rect = this.getPaddedRect();
- return point.x >= rect.left && point.x <= rect.right;
- }
-
- getRect() {
- return this.range.getBoundingClientRect();
- }
-
- getPaddedRect() {
- const range = this.range.cloneRange();
- const startOffset = range.startOffset;
- const endOffset = range.endOffset;
- const node = range.startContainer;
-
- range.setStart(node, Math.max(0, startOffset - 1));
- range.setEnd(node, Math.min(node.length, endOffset + 1));
-
- return range.getBoundingClientRect();
- }
-
- select() {
- const selection = window.getSelection();
- selection.removeAllRanges();
- selection.addRange(this.range);
- }
-
- deselect() {
- const selection = window.getSelection();
- selection.removeAllRanges();
- }
-
- equals(other) {
- return other.range && other.range.compareBoundaryPoints(Range.START_TO_START, this.range) === 0;
- }
-
- static shouldEnter(node) {
- if (node.nodeType !== 1) {
- return false;
- }
-
- const skip = ['RT', 'SCRIPT', 'STYLE'];
- if (skip.includes(node.nodeName)) {
- return false;
- }
-
- const style = window.getComputedStyle(node);
- const hidden =
- style.visibility === 'hidden' ||
- style.display === 'none' ||
- parseFloat(style.fontSize) === 0;
-
- return !hidden;
- }
-
- static seekForward(node, offset, length) {
- const state = {node, offset, remainder: length, content: ''};
- if (!TextSourceRange.seekForwardHelper(node, state)) {
- return state;
- }
-
- for (let current = node; current !== null; current = current.parentElement) {
- for (let sibling = current.nextSibling; sibling !== null; sibling = sibling.nextSibling) {
- if (!TextSourceRange.seekForwardHelper(sibling, state)) {
- return state;
- }
- }
- }
-
- return state;
- }
-
- static seekForwardHelper(node, state) {
- if (node.nodeType === 3 && node.parentElement && TextSourceRange.shouldEnter(node.parentElement)) {
- const offset = state.node === node ? state.offset : 0;
- const remaining = node.length - offset;
- const consumed = Math.min(remaining, state.remainder);
- state.content = state.content + node.nodeValue.substring(offset, offset + consumed);
- state.node = node;
- state.offset = offset + consumed;
- state.remainder -= consumed;
- } else if (TextSourceRange.shouldEnter(node)) {
- for (let i = 0; i < node.childNodes.length; ++i) {
- if (!TextSourceRange.seekForwardHelper(node.childNodes[i], state)) {
- break;
- }
- }
- }
-
- return state.remainder > 0;
- }
-
- static seekBackward(node, offset, length) {
- const state = {node, offset, remainder: length, content: ''};
- if (!TextSourceRange.seekBackwardHelper(node, state)) {
- return state;
- }
-
- for (let current = node; current !== null; current = current.parentElement) {
- for (let sibling = current.previousSibling; sibling !== null; sibling = sibling.previousSibling) {
- if (!TextSourceRange.seekBackwardHelper(sibling, state)) {
- return state;
- }
- }
- }
-
- return state;
- }
-
- static seekBackwardHelper(node, state) {
- if (node.nodeType === 3 && node.parentElement && TextSourceRange.shouldEnter(node.parentElement)) {
- const offset = state.node === node ? state.offset : node.length;
- const remaining = offset;
- const consumed = Math.min(remaining, state.remainder);
- state.content = node.nodeValue.substring(offset - consumed, offset) + state.content;
- state.node = node;
- state.offset = offset - consumed;
- state.remainder -= consumed;
- } else if (TextSourceRange.shouldEnter(node)) {
- for (let i = node.childNodes.length - 1; i >= 0; --i) {
- if (!TextSourceRange.seekBackwardHelper(node.childNodes[i], state)) {
- break;
- }
- }
- }
-
- return state.remainder > 0;
- }
-}