mirror of
https://github.com/hedgedoc/hedgedoc.git
synced 2024-11-26 03:33:58 -05:00
290 lines
No EOL
9.3 KiB
JavaScript
290 lines
No EOL
9.3 KiB
JavaScript
// Inject line numbers for sync scroll.
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function addPart(tokens, idx) {
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if (tokens[idx].map && tokens[idx].level === 0) {
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var startline = tokens[idx].map[0] + 1;
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var endline = tokens[idx].map[1];
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tokens[idx].attrJoin('class', 'part');
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tokens[idx].attrJoin('data-startline', startline);
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tokens[idx].attrJoin('data-endline', endline);
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}
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}
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md.renderer.rules.blockquote_open = function (tokens, idx, options, env, self) {
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tokens[idx].attrJoin('class', 'raw');
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addPart(tokens, idx);
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.table_open = function (tokens, idx, options, env, self) {
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addPart(tokens, idx);
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.bullet_list_open = function (tokens, idx, options, env, self) {
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addPart(tokens, idx);
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.list_item_open = function (tokens, idx, options, env, self) {
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tokens[idx].attrJoin('class', 'raw');
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if (tokens[idx].map) {
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var startline = tokens[idx].map[0] + 1;
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var endline = tokens[idx].map[1];
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tokens[idx].attrJoin('class', 'part');
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tokens[idx].attrJoin('data-startline', startline);
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tokens[idx].attrJoin('data-endline', endline);
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}
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.ordered_list_open = function (tokens, idx, options, env, self) {
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addPart(tokens, idx);
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.link_open = function (tokens, idx, options, env, self) {
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addPart(tokens, idx);
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.paragraph_open = function (tokens, idx, options, env, self) {
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addPart(tokens, idx);
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.heading_open = function (tokens, idx, options, env, self) {
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tokens[idx].attrJoin('class', 'raw');
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addPart(tokens, idx);
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return self.renderToken.apply(self, arguments);
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};
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md.renderer.rules.fence = function (tokens, idx, options, env, self) {
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var token = tokens[idx],
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info = token.info ? md.utils.unescapeAll(token.info).trim() : '',
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langName = '',
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highlighted;
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if (info) {
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langName = info.split(/\s+/g)[0];
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token.attrJoin('class', options.langPrefix + langName.replace(/\=$|\=\d+$|\=\+$/, ''));
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token.attrJoin('class', 'hljs');
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}
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if (options.highlight) {
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highlighted = options.highlight(token.content, langName) || md.utils.escapeHtml(token.content);
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} else {
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highlighted = md.utils.escapeHtml(token.content);
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}
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if (highlighted.indexOf('<pre') === 0) {
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return highlighted + '\n';
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}
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if (tokens[idx].map && tokens[idx].level === 0) {
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var startline = tokens[idx].map[0] + 1;
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var endline = tokens[idx].map[1];
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return '<pre class="part" data-startline="' + startline + '" data-endline="' + endline + '"><code' + self.renderAttrs(token) + '>'
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+ highlighted
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+ '</code></pre>\n';
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}
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return '<pre><code' + self.renderAttrs(token) + '>'
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+ highlighted
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+ '</code></pre>\n';
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};
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md.renderer.rules.code_block = function (tokens, idx, options, env, self) {
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if (tokens[idx].map && tokens[idx].level === 0) {
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var startline = tokens[idx].map[0] + 1;
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var endline = tokens[idx].map[1];
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return '<pre class="part" data-startline="' + startline + '" data-endline="' + endline + '"><code>' + md.utils.escapeHtml(tokens[idx].content) + '</code></pre>\n';
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}
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return '<pre><code>' + md.utils.escapeHtml(tokens[idx].content) + '</code></pre>\n';
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};
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var preventSyncScroll = false;
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//var editorScrollThrottle = 100;
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var buildMapThrottle = 100;
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var viewScrolling = false;
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var viewScrollingDelay = 200;
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var viewScrollingTimer = null;
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//editor.on('scroll', _.throttle(syncScrollToView, editorScrollThrottle));
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editor.on('scroll', syncScrollToView);
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ui.area.view.on('scroll', function () {
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viewScrolling = true;
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clearTimeout(viewScrollingTimer);
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viewScrollingTimer = setTimeout(function () {
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viewScrolling = false;
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}, viewScrollingDelay);
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});
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//editor.on('scroll', _.debounce(syncScrollToView, syncScrollDelay));
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//ui.area.view.on('scroll', _.debounce(syncScrollToEdit, 50));
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var scrollMap, lineHeightMap, viewTop, viewBottom;
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viewAjaxCallback = clearMap;
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function clearMap() {
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scrollMap = null;
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lineHeightMap = null;
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viewTop = null;
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viewBottom = null;
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}
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var buildMap = _.throttle(buildMapInner, buildMapThrottle);
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// Build offsets for each line (lines can be wrapped)
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// That's a bit dirty to process each line everytime, but ok for demo.
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// Optimizations are required only for big texts.
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function buildMapInner(syncBack) {
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var i, offset, nonEmptyList, pos, a, b, _lineHeightMap, linesCount,
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acc, _scrollMap;
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offset = ui.area.view.scrollTop() - ui.area.view.offset().top;
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_scrollMap = [];
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nonEmptyList = [];
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_lineHeightMap = [];
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viewTop = 0;
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viewBottom = ui.area.view[0].scrollHeight - ui.area.view.height();
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acc = 0;
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var lines = editor.getValue().split('\n');
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var lineHeight = editor.defaultTextHeight();
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for (i = 0; i < lines.length; i++) {
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var str = lines[i];
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_lineHeightMap.push(acc);
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if (str.length === 0) {
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acc++;
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continue;
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}
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var h = editor.heightAtLine(i + 1) - editor.heightAtLine(i);
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acc += Math.round(h / lineHeight);
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}
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_lineHeightMap.push(acc);
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linesCount = acc;
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for (i = 0; i < linesCount; i++) {
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_scrollMap.push(-1);
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}
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nonEmptyList.push(0);
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// make the first line go top
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_scrollMap[0] = viewTop;
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var parts = ui.area.markdown.find('.part').toArray();
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for (i = 0; i < parts.length; i++) {
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var $el = $(parts[i]),
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t = $el.attr('data-startline') - 1;
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if (t === '') {
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return;
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}
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t = _lineHeightMap[t];
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if (t !== 0 && t !== nonEmptyList[nonEmptyList.length - 1]) {
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nonEmptyList.push(t);
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}
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_scrollMap[t] = Math.round($el.offset().top + offset - 10);
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}
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nonEmptyList.push(linesCount);
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_scrollMap[linesCount] = ui.area.view[0].scrollHeight;
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pos = 0;
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for (i = 1; i < linesCount; i++) {
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if (_scrollMap[i] !== -1) {
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pos++;
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continue;
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}
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a = nonEmptyList[pos];
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b = nonEmptyList[pos + 1];
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_scrollMap[i] = Math.round((_scrollMap[b] * (i - a) + _scrollMap[a] * (b - i)) / (b - a));
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}
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_scrollMap[0] = 0;
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scrollMap = _scrollMap;
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lineHeightMap = _lineHeightMap;
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if (loaded && syncBack)
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syncScrollToView();
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}
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function getPartByEditorLineNo(lineNo) {
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var part = null;
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ui.area.markdown.find('.part').each(function (n, el) {
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if (part) return;
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var $el = $(el),
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t = $el.data('startline') - 1,
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f = $el.data('endline') - 1;
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if (t === '' || f === '') {
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return;
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}
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if (lineNo >= t && lineNo <= f) {
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part = $el;
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}
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});
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if (part)
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return {
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startline: part.data('startline') - 1,
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endline: part.data('endline') - 1,
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linediff: Math.abs(part.data('endline') - part.data('startline')) + 1,
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element: part
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};
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else
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return null;
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}
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function getEditorLineNoByTop(top) {
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for (var i = 0; i < lineHeightMap.length; i++)
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if (lineHeightMap[i] * editor.defaultTextHeight() > top)
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return i;
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return null;
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}
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function syncScrollToView(event, _lineNo) {
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if (currentMode != modeType.both) return;
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if (preventSyncScroll) {
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preventSyncScroll = false;
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return;
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}
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var lineNo, posTo;
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var scrollInfo = editor.getScrollInfo();
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if (!scrollMap || !lineHeightMap) {
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buildMap(true);
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return;
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}
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if (!_lineNo) {
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var topDiffPercent, posToNextDiff;
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var textHeight = editor.defaultTextHeight();
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lineNo = Math.floor(scrollInfo.top / textHeight);
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// if reach the last line, will start lerp to the bottom
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var diffToBottom = (scrollInfo.top + scrollInfo.clientHeight) - (scrollInfo.height - textHeight);
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if (scrollInfo.height > scrollInfo.clientHeight && diffToBottom > 0) {
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topDiffPercent = diffToBottom / textHeight;
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posTo = scrollMap[lineNo + 1];
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posToNextDiff = (viewBottom - posTo) * topDiffPercent;
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posTo += Math.floor(posToNextDiff);
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} else {
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topDiffPercent = (scrollInfo.top % textHeight) / textHeight;
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posTo = scrollMap[lineNo];
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posToNextDiff = (scrollMap[lineNo + 1] - posTo) * topDiffPercent;
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posTo += Math.floor(posToNextDiff);
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}
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} else {
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if (viewScrolling) return;
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posTo = scrollMap[lineHeightMap[_lineNo]];
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}
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var posDiff = Math.abs(ui.area.view.scrollTop() - posTo);
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var duration = posDiff / 50;
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ui.area.view.stop(true, true).animate({
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scrollTop: posTo
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}, duration >= 100 ? duration : 100, "linear");
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/*
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if (posDiff > scrollInfo.clientHeight / 5) {
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var duration = posDiff / 50;
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ui.area.view.stop(true, true).animate({
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scrollTop: posTo
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}, duration >= 100 ? duration : 100, "linear");
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} else {
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ui.area.view.stop(true, true).scrollTop(posTo);
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}
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*/
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} |