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-rw-r--r--ext/fg/js/source.js190
1 files changed, 114 insertions, 76 deletions
diff --git a/ext/fg/js/source.js b/ext/fg/js/source.js
index 4642de50..ee4f58e2 100644
--- a/ext/fg/js/source.js
+++ b/ext/fg/js/source.js
@@ -83,120 +83,142 @@ class TextSourceRange {
}
static shouldEnter(node) {
- if (node.nodeType !== 1) {
- return false;
- }
-
- const skip = ['RT', 'SCRIPT', 'STYLE'];
- if (skip.includes(node.nodeName.toUpperCase())) {
- return false;
+ switch (node.nodeName.toUpperCase()) {
+ case 'RT':
+ case 'SCRIPT':
+ case 'STYLE':
+ return false;
}
const style = window.getComputedStyle(node);
- const hidden =
+ return !(
style.visibility === 'hidden' ||
style.display === 'none' ||
- parseFloat(style.fontSize) === 0;
+ parseFloat(style.fontSize) === 0);
+ }
- return !hidden;
+ static getRubyElement(node) {
+ node = TextSourceRange.getParentElement(node);
+ if (node !== null && node.nodeName.toUpperCase() === "RT") {
+ node = node.parentNode;
+ return (node !== null && node.nodeName.toUpperCase() === "RUBY") ? node : null;
+ }
+ return null;
}
static seekForward(node, offset, length) {
const state = {node, offset, remainder: length, content: ''};
- if (!TextSourceRange.seekForwardHelper(node, state)) {
- return state;
+ const TEXT_NODE = Node.TEXT_NODE;
+ const ELEMENT_NODE = Node.ELEMENT_NODE;
+ let resetOffset = false;
+
+ const ruby = TextSourceRange.getRubyElement(node);
+ if (ruby !== null) {
+ node = ruby;
+ resetOffset = true;
}
- 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;
+ while (node !== null) {
+ let visitChildren = true;
+ const nodeType = node.nodeType;
+
+ if (nodeType === TEXT_NODE) {
+ state.node = node;
+ if (TextSourceRange.seekForwardTextNode(state, resetOffset)) {
+ break;
}
+ resetOffset = true;
+ } else if (nodeType === ELEMENT_NODE) {
+ visitChildren = TextSourceRange.shouldEnter(node);
}
+
+ node = TextSourceRange.getNextNode(node, visitChildren);
}
return state;
}
- static seekForwardHelper(node, state) {
- if (node.nodeType === 3 && node.parentElement && TextSourceRange.shouldEnter(node.parentElement)) {
- const offset = state.node === node ? state.offset : 0;
-
- let consumed = 0;
- let stripped = 0;
- while (state.remainder - consumed > 0) {
- const currentChar = node.nodeValue[offset + consumed + stripped];
- if (!currentChar) {
- break;
- } else if (currentChar.match(IGNORE_TEXT_PATTERN)) {
- stripped++;
- } else {
- consumed++;
- state.content += currentChar;
- }
- }
-
- state.node = node;
- state.offset = offset + consumed + stripped;
- state.remainder -= consumed;
- } else if (TextSourceRange.shouldEnter(node)) {
- for (let i = 0; i < node.childNodes.length; ++i) {
- if (!TextSourceRange.seekForwardHelper(node.childNodes[i], state)) {
+ static seekForwardTextNode(state, resetOffset) {
+ const nodeValue = state.node.nodeValue;
+ const nodeValueLength = nodeValue.length;
+ let content = state.content;
+ let offset = resetOffset ? 0 : state.offset;
+ let remainder = state.remainder;
+ let result = false;
+
+ for (; offset < nodeValueLength; ++offset) {
+ const c = nodeValue[offset];
+ if (!IGNORE_TEXT_PATTERN.test(c)) {
+ content += c;
+ if (--remainder <= 0) {
+ result = true;
+ ++offset;
break;
}
}
}
- return state.remainder > 0;
+ state.offset = offset;
+ state.content = content;
+ state.remainder = remainder;
+ return result;
}
static seekBackward(node, offset, length) {
const state = {node, offset, remainder: length, content: ''};
- if (!TextSourceRange.seekBackwardHelper(node, state)) {
- return state;
+ const TEXT_NODE = Node.TEXT_NODE;
+ const ELEMENT_NODE = Node.ELEMENT_NODE;
+ let resetOffset = false;
+
+ const ruby = TextSourceRange.getRubyElement(node);
+ if (ruby !== null) {
+ node = ruby;
+ resetOffset = true;
}
- 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;
+ while (node !== null) {
+ let visitChildren = true;
+ const nodeType = node.nodeType;
+
+ if (nodeType === TEXT_NODE) {
+ state.node = node;
+ if (TextSourceRange.seekBackwardTextNode(state, resetOffset)) {
+ break;
}
+ resetOffset = true;
+ } else if (nodeType === ELEMENT_NODE) {
+ visitChildren = TextSourceRange.shouldEnter(node);
}
+
+ node = TextSourceRange.getPreviousNode(node, visitChildren);
}
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;
-
- let consumed = 0;
- let stripped = 0;
- while (state.remainder - consumed > 0) {
- const currentChar = node.nodeValue[offset - 1 - consumed - stripped]; // negative indices are undefined in JS
- if (!currentChar) {
- break;
- } else if (currentChar.match(IGNORE_TEXT_PATTERN)) {
- stripped++;
- } else {
- consumed++;
- state.content = currentChar + state.content;
- }
- }
-
- state.node = node;
- state.offset = offset - consumed - stripped;
- 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)) {
+ static seekBackwardTextNode(state, resetOffset) {
+ const nodeValue = state.node.nodeValue;
+ let content = state.content;
+ let offset = resetOffset ? nodeValue.length : state.offset;
+ let remainder = state.remainder;
+ let result = false;
+
+ for (; offset > 0; --offset) {
+ const c = nodeValue[offset - 1];
+ if (!IGNORE_TEXT_PATTERN.test(c)) {
+ content = c + content;
+ if (--remainder <= 0) {
+ result = true;
+ --offset;
break;
}
}
}
- return state.remainder > 0;
+ state.offset = offset;
+ state.content = content;
+ state.remainder = remainder;
+ return result;
}
static getParentElement(node) {
@@ -219,22 +241,38 @@ class TextSourceRange {
static getNodesInRange(range) {
const end = range.endContainer;
const nodes = [];
- for (let node = range.startContainer; node !== null; node = TextSourceRange.getNextNode(node)) {
+ for (let node = range.startContainer; node !== null; node = TextSourceRange.getNextNode(node, true)) {
nodes.push(node);
if (node === end) { break; }
}
return nodes;
}
- static getNextNode(node) {
- let next = node.firstChild;
+ static getNextNode(node, visitChildren) {
+ let next = visitChildren ? node.firstChild : null;
if (next === null) {
while (true) {
next = node.nextSibling;
if (next !== null) { break; }
next = node.parentNode;
- if (node === null) { break; }
+ if (next === null) { break; }
+
+ node = next;
+ }
+ }
+ return next;
+ }
+
+ static getPreviousNode(node, visitChildren) {
+ let next = visitChildren ? node.lastChild : null;
+ if (next === null) {
+ while (true) {
+ next = node.previousSibling;
+ if (next !== null) { break; }
+
+ next = node.parentNode;
+ if (next === null) { break; }
node = next;
}