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-rw-r--r--ext/fg/js/source.js101
1 files changed, 65 insertions, 36 deletions
diff --git a/ext/fg/js/source.js b/ext/fg/js/source.js
index 07006cc9..fa4706f2 100644
--- a/ext/fg/js/source.js
+++ b/ext/fg/js/source.js
@@ -358,13 +358,32 @@ class TextSourceRange {
*/
class TextSourceElement {
- constructor(element, content='') {
- this.element = element;
- this.content = content;
+ constructor(element, fullContent=null, startOffset=0, endOffset=0) {
+ this._element = element;
+ this._fullContent = (typeof fullContent === 'string' ? fullContent : TextSourceElement.getElementContent(element));
+ this._startOffset = startOffset;
+ this._endOffset = endOffset;
+ this._content = this._fullContent.substring(this._startOffset, this._endOffset);
+ }
+
+ get element() {
+ return this._element;
+ }
+
+ get fullContent() {
+ return this._fullContent;
+ }
+
+ get startOffset() {
+ return this._startOffset;
+ }
+
+ get endOffset() {
+ return this._endOffset;
}
clone() {
- return new TextSourceElement(this.element, this.content);
+ return new TextSourceElement(this._element, this._fullContent, this._startOffset, this._endOffset);
}
cleanup() {
@@ -372,44 +391,32 @@ class TextSourceElement {
}
text() {
- return this.content;
+ return this._content;
}
- setEndOffset(length) {
- switch (this.element.nodeName.toUpperCase()) {
- case 'BUTTON':
- this.content = this.element.textContent;
- break;
- case 'IMG':
- this.content = this.element.getAttribute('alt');
- break;
- default:
- this.content = this.element.value;
- break;
- }
-
- let consumed = 0;
- let content = '';
- for (const currentChar of this.content || '') {
- if (consumed >= length) {
- break;
- } else if (!currentChar.match(IGNORE_TEXT_PATTERN)) {
- consumed++;
- content += currentChar;
- }
+ setEndOffset(length, fromEnd=false) {
+ if (fromEnd) {
+ const delta = Math.min(this._fullContent.length - this._endOffset, length);
+ this._endOffset += delta;
+ this._content = this._fullContent.substring(this._startOffset, this._endOffset);
+ return delta;
+ } else {
+ const delta = Math.min(this._fullContent.length - this._startOffset, length);
+ this._endOffset = this._startOffset + delta;
+ this._content = this._fullContent.substring(this._startOffset, this._endOffset);
+ return delta;
}
-
- this.content = content;
-
- return this.content.length;
}
- setStartOffset() {
- return 0;
+ setStartOffset(length) {
+ const delta = Math.min(this._startOffset, length);
+ this._startOffset -= delta;
+ this._content = this._fullContent.substring(this._startOffset, this._endOffset);
+ return delta;
}
getRect() {
- return this.element.getBoundingClientRect();
+ return this._element.getBoundingClientRect();
}
getWritingMode() {
@@ -429,8 +436,30 @@ class TextSourceElement {
typeof other === 'object' &&
other !== null &&
other instanceof TextSourceElement &&
- other.element === this.element &&
- other.content === this.content
+ this._element === other.element &&
+ this._fullContent === other.fullContent &&
+ this._startOffset === other.startOffset &&
+ this._endOffset === other.endOffset
);
}
+
+ static getElementContent(element) {
+ let content;
+ switch (element.nodeName.toUpperCase()) {
+ case 'BUTTON':
+ content = element.textContent;
+ break;
+ case 'IMG':
+ content = element.getAttribute('alt') || '';
+ break;
+ default:
+ content = `${element.value}`;
+ break;
+ }
+
+ // Remove zero-width non-joiner
+ content = content.replace(/\u200c/g, '');
+
+ return content;
+ }
}