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support code block MathJax preview

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This commit is contained in:
Le Tan 2018-04-10 22:28:24 +08:00
parent c72398e887
commit 8239abec2a
20 changed files with 1180 additions and 21 deletions
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7
src/resources/markdown_template.js
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@ -1419,6 +1419,11 @@ var previewCodeBlock = function(id, lang, text, isLivePreview) {
var setPreviewContent = function(lang, html) { var setPreviewContent = function(lang, html) {
previewDiv.innerHTML = html; previewDiv.innerHTML = html;
// Treat plantUML and graphviz the same. // Treat plantUML and graphviz the same.
previewDiv.classList = VPlantUMLDivClass; if (lang == "puml" || lang == "dot") {
previewDiv.classList = VPlantUMLDivClass;
} else {
previewDiv.className = '';
}
}; };

48
src/resources/mathjax_preview.js Normal file
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@ -0,0 +1,48 @@
var channelInitialized = false;
var contentDiv = document.getElementById('content-div');
var content;
new QWebChannel(qt.webChannelTransport,
function(channel) {
content = channel.objects.content;
content.requestPreviewMathJax.connect(previewMathJax);
channelInitialized = true;
});
var previewMathJax = function(identifier, id, text) {
if (text.length == 0) {
return;
}
var p = document.createElement('p');
p.id = identifier + '_' + id;
p.textContent = text;
contentDiv.appendChild(p);
try {
MathJax.Hub.Queue(["Typeset",
MathJax.Hub,
p,
postProcessMathJax.bind(undefined, identifier, id, p)]);
} catch (err) {
console.log("err: " + err);
contentDiv.removeChild(p);
delete p;
}
};
var postProcessMathJax = function(identifier, id, container) {
domtoimage.toPng(container, { height: container.clientHeight * 1.5 }).then(function (dataUrl) {
var png = dataUrl.substring(dataUrl.indexOf(',') + 1);
content.mathjaxResultReady(identifier, id, 'png', png);
contentDiv.removeChild(container);
delete container;
}).catch(function (err) {
console.log("err: " + err);
});
};

15
src/resources/mathjax_preview_template.html Normal file
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@ -0,0 +1,15 @@
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
<link rel="stylesheet" type="text/css" href="CSS_PLACE_HOLDER">
<script src="qrc:/resources/qwebchannel.js"></script>
<!-- EXTRA_PLACE_HOLDER -->
<script src="JS_PLACE_HOLDER" async></script>
<script src="qrc:/utils/dom-to-image/dom-to-image.js" defer></script>
<script src="qrc:/resources/mathjax_preview.js" defer></script>
</head>
<body>
<div id="content-div"></div>
</body>
</html>

8
src/src.pro
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@ -128,7 +128,9 @@ SOURCES += main.cpp\
dialog/vfixnotebookdialog.cpp \ dialog/vfixnotebookdialog.cpp \
vplantumlhelper.cpp \ vplantumlhelper.cpp \
vgraphvizhelper.cpp \ vgraphvizhelper.cpp \
vlivepreviewhelper.cpp vlivepreviewhelper.cpp \
vmathjaxpreviewhelper.cpp \
vmathjaxwebdocument.cpp
HEADERS += vmainwindow.h \ HEADERS += vmainwindow.h \
vdirectorytree.h \ vdirectorytree.h \
@ -247,7 +249,9 @@ HEADERS += vmainwindow.h \
dialog/vfixnotebookdialog.h \ dialog/vfixnotebookdialog.h \
vplantumlhelper.h \ vplantumlhelper.h \
vgraphvizhelper.h \ vgraphvizhelper.h \
vlivepreviewhelper.h vlivepreviewhelper.h \
vmathjaxpreviewhelper.h \
vmathjaxwebdocument.h
RESOURCES += \ RESOURCES += \
vnote.qrc \ vnote.qrc \

3
src/utils/dom-to-image/README.md Normal file
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@ -0,0 +1,3 @@
# [dom-to-image](https://github.com/tsayen/dom-to-image)
v2.6.0
Anatolii Saienko, Paul Bakaus (original idea)

779
src/utils/dom-to-image/dom-to-image.js Normal file
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@ -0,0 +1,779 @@
(function (global) {
'use strict';
var util = newUtil();
var inliner = newInliner();
var fontFaces = newFontFaces();
var images = newImages();
// Default impl options
var defaultOptions = {
// Default is to fail on error, no placeholder
imagePlaceholder: undefined,
// Default cache bust is false, it will use the cache
cacheBust: false
};
var domtoimage = {
toSvg: toSvg,
toPng: toPng,
toJpeg: toJpeg,
toBlob: toBlob,
toPixelData: toPixelData,
impl: {
fontFaces: fontFaces,
images: images,
util: util,
inliner: inliner,
options: {}
}
};
if (typeof module !== 'undefined')
module.exports = domtoimage;
else
global.domtoimage = domtoimage;
/**
* @param {Node} node - The DOM Node object to render
* @param {Object} options - Rendering options
* @param {Function} options.filter - Should return true if passed node should be included in the output
* (excluding node means excluding it's children as well). Not called on the root node.
* @param {String} options.bgcolor - color for the background, any valid CSS color value.
* @param {Number} options.width - width to be applied to node before rendering.
* @param {Number} options.height - height to be applied to node before rendering.
* @param {Object} options.style - an object whose properties to be copied to node's style before rendering.
* @param {Number} options.quality - a Number between 0 and 1 indicating image quality (applicable to JPEG only),
defaults to 1.0.
* @param {String} options.imagePlaceholder - dataURL to use as a placeholder for failed images, default behaviour is to fail fast on images we can't fetch
* @param {Boolean} options.cacheBust - set to true to cache bust by appending the time to the request url
* @return {Promise} - A promise that is fulfilled with a SVG image data URL
* */
function toSvg(node, options) {
options = options || {};
copyOptions(options);
return Promise.resolve(node)
.then(function (node) {
return cloneNode(node, options.filter, true);
})
.then(embedFonts)
.then(inlineImages)
.then(applyOptions)
.then(function (clone) {
return makeSvgDataUri(clone,
options.width || util.width(node),
options.height || util.height(node)
);
});
function applyOptions(clone) {
if (options.bgcolor) clone.style.backgroundColor = options.bgcolor;
if (options.width) clone.style.width = options.width + 'px';
if (options.height) clone.style.height = options.height + 'px';
if (options.style)
Object.keys(options.style).forEach(function (property) {
clone.style[property] = options.style[property];
});
return clone;
}
}
/**
* @param {Node} node - The DOM Node object to render
* @param {Object} options - Rendering options, @see {@link toSvg}
* @return {Promise} - A promise that is fulfilled with a Uint8Array containing RGBA pixel data.
* */
function toPixelData(node, options) {
return draw(node, options || {})
.then(function (canvas) {
return canvas.getContext('2d').getImageData(
0,
0,
util.width(node),
util.height(node)
).data;
});
}
/**
* @param {Node} node - The DOM Node object to render
* @param {Object} options - Rendering options, @see {@link toSvg}
* @return {Promise} - A promise that is fulfilled with a PNG image data URL
* */
function toPng(node, options) {
return draw(node, options || {})
.then(function (canvas) {
return canvas.toDataURL();
});
}
/**
* @param {Node} node - The DOM Node object to render
* @param {Object} options - Rendering options, @see {@link toSvg}
* @return {Promise} - A promise that is fulfilled with a JPEG image data URL
* */
function toJpeg(node, options) {
options = options || {};
return draw(node, options)
.then(function (canvas) {
return canvas.toDataURL('image/jpeg', options.quality || 1.0);
});
}
/**
* @param {Node} node - The DOM Node object to render
* @param {Object} options - Rendering options, @see {@link toSvg}
* @return {Promise} - A promise that is fulfilled with a PNG image blob
* */
function toBlob(node, options) {
return draw(node, options || {})
.then(util.canvasToBlob);
}
function copyOptions(options) {
// Copy options to impl options for use in impl
if(typeof(options.imagePlaceholder) === 'undefined') {
domtoimage.impl.options.imagePlaceholder = defaultOptions.imagePlaceholder;
} else {
domtoimage.impl.options.imagePlaceholder = options.imagePlaceholder;
}
if(typeof(options.cacheBust) === 'undefined') {
domtoimage.impl.options.cacheBust = defaultOptions.cacheBust;
} else {
domtoimage.impl.options.cacheBust = options.cacheBust;
}
}
function draw(domNode, options) {
return toSvg(domNode, options)
.then(util.makeImage)
.then(util.delay(100))
.then(function (image) {
var canvas = newCanvas(domNode);
canvas.getContext('2d').drawImage(image, 0, 0);
return canvas;
});
function newCanvas(domNode) {
var canvas = document.createElement('canvas');
canvas.width = options.width || util.width(domNode);
canvas.height = options.height || util.height(domNode);
if (options.bgcolor) {
var ctx = canvas.getContext('2d');
ctx.fillStyle = options.bgcolor;
ctx.fillRect(0, 0, canvas.width, canvas.height);
}
return canvas;
}
}
function cloneNode(node, filter, root) {
if (!root && filter && !filter(node)) return Promise.resolve();
return Promise.resolve(node)
.then(makeNodeCopy)
.then(function (clone) {
return cloneChildren(node, clone, filter);
})
.then(function (clone) {
return processClone(node, clone);
});
function makeNodeCopy(node) {
if (node instanceof HTMLCanvasElement) return util.makeImage(node.toDataURL());
return node.cloneNode(false);
}
function cloneChildren(original, clone, filter) {
var children = original.childNodes;
if (children.length === 0) return Promise.resolve(clone);
return cloneChildrenInOrder(clone, util.asArray(children), filter)
.then(function () {
return clone;
});
function cloneChildrenInOrder(parent, children, filter) {
var done = Promise.resolve();
children.forEach(function (child) {
done = done
.then(function () {
return cloneNode(child, filter);
})
.then(function (childClone) {
if (childClone) parent.appendChild(childClone);
});
});
return done;
}
}
function processClone(original, clone) {
if (!(clone instanceof Element)) return clone;
return Promise.resolve()
.then(cloneStyle)
.then(clonePseudoElements)
.then(copyUserInput)
.then(fixSvg)
.then(function () {
return clone;
});
function cloneStyle() {
// Fix MathJax issue.
if (!clone.style) {
return;
}
copyStyle(window.getComputedStyle(original), clone.style);
function copyStyle(source, target) {
if (source.cssText) target.cssText = source.cssText;
else copyProperties(source, target);
function copyProperties(source, target) {
util.asArray(source).forEach(function (name) {
target.setProperty(
name,
source.getPropertyValue(name),
source.getPropertyPriority(name)
);
});
}
}
}
function clonePseudoElements() {
[':before', ':after'].forEach(function (element) {
clonePseudoElement(element);
});
function clonePseudoElement(element) {
var style = window.getComputedStyle(original, element);
var content = style.getPropertyValue('content');
if (content === '' || content === 'none') return;
var className = util.uid();
clone.className = clone.className + ' ' + className;
var styleElement = document.createElement('style');
styleElement.appendChild(formatPseudoElementStyle(className, element, style));
clone.appendChild(styleElement);
function formatPseudoElementStyle(className, element, style) {
var selector = '.' + className + ':' + element;
var cssText = style.cssText ? formatCssText(style) : formatCssProperties(style);
return document.createTextNode(selector + '{' + cssText + '}');
function formatCssText(style) {
var content = style.getPropertyValue('content');
return style.cssText + ' content: ' + content + ';';
}
function formatCssProperties(style) {
return util.asArray(style)
.map(formatProperty)
.join('; ') + ';';
function formatProperty(name) {
return name + ': ' +
style.getPropertyValue(name) +
(style.getPropertyPriority(name) ? ' !important' : '');
}
}
}
}
}
function copyUserInput() {
if (original instanceof HTMLTextAreaElement) clone.innerHTML = original.value;
if (original instanceof HTMLInputElement) clone.setAttribute("value", original.value);
}
function fixSvg() {
if (!(clone instanceof SVGElement)) return;
clone.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
if (!(clone instanceof SVGRectElement)) return;
['width', 'height'].forEach(function (attribute) {
var value = clone.getAttribute(attribute);
if (!value) return;
clone.style.setProperty(attribute, value);
});
}
}
}
function embedFonts(node) {
return fontFaces.resolveAll()
.then(function (cssText) {
var styleNode = document.createElement('style');
node.appendChild(styleNode);
styleNode.appendChild(document.createTextNode(cssText));
return node;
});
}
function inlineImages(node) {
return images.inlineAll(node)
.then(function () {
return node;
});
}
function makeSvgDataUri(node, width, height) {
return Promise.resolve(node)
.then(function (node) {
node.setAttribute('xmlns', 'http://www.w3.org/1999/xhtml');
return new XMLSerializer().serializeToString(node);
})
.then(util.escapeXhtml)
.then(function (xhtml) {
return '<foreignObject x="0" y="0" width="100%" height="100%">' + xhtml + '</foreignObject>';
})
.then(function (foreignObject) {
return '<svg xmlns="http://www.w3.org/2000/svg" width="' + width + '" height="' + height + '">' +
foreignObject + '</svg>';
})
.then(function (svg) {
return 'data:image/svg+xml;charset=utf-8,' + svg;
});
}
function newUtil() {
return {
escape: escape,
parseExtension: parseExtension,
mimeType: mimeType,
dataAsUrl: dataAsUrl,
isDataUrl: isDataUrl,
canvasToBlob: canvasToBlob,
resolveUrl: resolveUrl,
getAndEncode: getAndEncode,
uid: uid(),
delay: delay,
asArray: asArray,
escapeXhtml: escapeXhtml,
makeImage: makeImage,
width: width,
height: height
};
function mimes() {
/*
* Only WOFF and EOT mime types for fonts are 'real'
* see http://www.iana.org/assignments/media-types/media-types.xhtml
*/
var WOFF = 'application/font-woff';
var JPEG = 'image/jpeg';
return {
'woff': WOFF,
'woff2': WOFF,
'ttf': 'application/font-truetype',
'eot': 'application/vnd.ms-fontobject',
'png': 'image/png',
'jpg': JPEG,
'jpeg': JPEG,
'gif': 'image/gif',
'tiff': 'image/tiff',
'svg': 'image/svg+xml'
};
}
function parseExtension(url) {
var match = /\.([^\.\/]*?)$/g.exec(url);
if (match) return match[1];
else return '';
}
function mimeType(url) {
var extension = parseExtension(url).toLowerCase();
return mimes()[extension] || '';
}
function isDataUrl(url) {
return url.search(/^(data:)/) !== -1;
}
function toBlob(canvas) {
return new Promise(function (resolve) {
var binaryString = window.atob(canvas.toDataURL().split(',')[1]);
var length = binaryString.length;
var binaryArray = new Uint8Array(length);
for (var i = 0; i < length; i++)
binaryArray[i] = binaryString.charCodeAt(i);
resolve(new Blob([binaryArray], {
type: 'image/png'
}));
});
}
function canvasToBlob(canvas) {
if (canvas.toBlob)
return new Promise(function (resolve) {
canvas.toBlob(resolve);
});
return toBlob(canvas);
}
function resolveUrl(url, baseUrl) {
var doc = document.implementation.createHTMLDocument();
var base = doc.createElement('base');
doc.head.appendChild(base);
var a = doc.createElement('a');
doc.body.appendChild(a);
base.href = baseUrl;
a.href = url;
return a.href;
}
function uid() {
var index = 0;
return function () {
return 'u' + fourRandomChars() + index++;
function fourRandomChars() {
/* see http://stackoverflow.com/a/6248722/2519373 */
return ('0000' + (Math.random() * Math.pow(36, 4) << 0).toString(36)).slice(-4);
}
};
}
function makeImage(uri) {
return new Promise(function (resolve, reject) {
var image = new Image();
image.onload = function () {
resolve(image);
};
image.onerror = reject;
image.src = uri;
});
}
function getAndEncode(url) {
var TIMEOUT = 30000;
if(domtoimage.impl.options.cacheBust) {
// Cache bypass so we dont have CORS issues with cached images
// Source: https://developer.mozilla.org/en/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest#Bypassing_the_cache
url += ((/\?/).test(url) ? "&" : "?") + (new Date()).getTime();
}
return new Promise(function (resolve) {
var request = new XMLHttpRequest();
request.onreadystatechange = done;
request.ontimeout = timeout;
request.responseType = 'blob';
request.timeout = TIMEOUT;
request.open('GET', url, true);
request.send();
var placeholder;
if(domtoimage.impl.options.imagePlaceholder) {
var split = domtoimage.impl.options.imagePlaceholder.split(/,/);
if(split && split[1]) {
placeholder = split[1];
}
}
function done() {
if (request.readyState !== 4) return;
if (request.status !== 200) {
if(placeholder) {
resolve(placeholder);
} else {
fail('cannot fetch resource: ' + url + ', status: ' + request.status);
}
return;
}
var encoder = new FileReader();
encoder.onloadend = function () {
var content = encoder.result.split(/,/)[1];
resolve(content);
};
encoder.readAsDataURL(request.response);
}
function timeout() {
if(placeholder) {
resolve(placeholder);
} else {
fail('timeout of ' + TIMEOUT + 'ms occured while fetching resource: ' + url);
}
}
function fail(message) {
console.error(message);
resolve('');
}
});
}
function dataAsUrl(content, type) {
return 'data:' + type + ';base64,' + content;
}
function escape(string) {
return string.replace(/([.*+?^${}()|\[\]\/\\])/g, '\\$1');
}
function delay(ms) {
return function (arg) {
return new Promise(function (resolve) {
setTimeout(function () {
resolve(arg);
}, ms);
});
};
}
function asArray(arrayLike) {
var array = [];
var length = arrayLike.length;
for (var i = 0; i < length; i++) array.push(arrayLike[i]);
return array;
}
function escapeXhtml(string) {
return string.replace(/#/g, '%23').replace(/\n/g, '%0A');
}
function width(node) {
var leftBorder = px(node, 'border-left-width');
var rightBorder = px(node, 'border-right-width');
return node.scrollWidth + leftBorder + rightBorder;
}
function height(node) {
var topBorder = px(node, 'border-top-width');
var bottomBorder = px(node, 'border-bottom-width');
return node.scrollHeight + topBorder + bottomBorder;
}
function px(node, styleProperty) {
var value = window.getComputedStyle(node).getPropertyValue(styleProperty);
return parseFloat(value.replace('px', ''));
}
}
function newInliner() {
var URL_REGEX = /url\(['"]?([^'"]+?)['"]?\)/g;
return {
inlineAll: inlineAll,
shouldProcess: shouldProcess,
impl: {
readUrls: readUrls,
inline: inline
}
};
function shouldProcess(string) {
return string.search(URL_REGEX) !== -1;
}
function readUrls(string) {
var result = [];
var match;
while ((match = URL_REGEX.exec(string)) !== null) {
result.push(match[1]);
}
return result.filter(function (url) {
return !util.isDataUrl(url);
});
}
function inline(string, url, baseUrl, get) {
return Promise.resolve(url)
.then(function (url) {
return baseUrl ? util.resolveUrl(url, baseUrl) : url;
})
.then(get || util.getAndEncode)
.then(function (data) {
return util.dataAsUrl(data, util.mimeType(url));
})
.then(function (dataUrl) {
return string.replace(urlAsRegex(url), '$1' + dataUrl + '$3');
});
function urlAsRegex(url) {
return new RegExp('(url\\([\'"]?)(' + util.escape(url) + ')([\'"]?\\))', 'g');
}
}
function inlineAll(string, baseUrl, get) {
if (nothingToInline()) return Promise.resolve(string);
return Promise.resolve(string)
.then(readUrls)
.then(function (urls) {
var done = Promise.resolve(string);
urls.forEach(function (url) {
done = done.then(function (string) {
return inline(string, url, baseUrl, get);
});
});
return done;
});
function nothingToInline() {
return !shouldProcess(string);
}
}
}
function newFontFaces() {
return {
resolveAll: resolveAll,
impl: {
readAll: readAll
}
};
function resolveAll() {
return readAll(document)
.then(function (webFonts) {
return Promise.all(
webFonts.map(function (webFont) {
return webFont.resolve();
})
);
})
.then(function (cssStrings) {
return cssStrings.join('\n');
});
}
function readAll() {
return Promise.resolve(util.asArray(document.styleSheets))
.then(getCssRules)
.then(selectWebFontRules)
.then(function (rules) {
return rules.map(newWebFont);
});
function selectWebFontRules(cssRules) {
return cssRules
.filter(function (rule) {
return rule.type === CSSRule.FONT_FACE_RULE;
})
.filter(function (rule) {
return inliner.shouldProcess(rule.style.getPropertyValue('src'));
});
}
function getCssRules(styleSheets) {
var cssRules = [];
styleSheets.forEach(function (sheet) {
try {
util.asArray(sheet.cssRules || []).forEach(cssRules.push.bind(cssRules));
} catch (e) {
console.log('Error while reading CSS rules from ' + sheet.href, e.toString());
}
});
return cssRules;
}
function newWebFont(webFontRule) {
return {
resolve: function resolve() {
var baseUrl = (webFontRule.parentStyleSheet || {}).href;
return inliner.inlineAll(webFontRule.cssText, baseUrl);
},
src: function () {
return webFontRule.style.getPropertyValue('src');
}
};
}
}
}
function newImages() {
return {
inlineAll: inlineAll,
impl: {
newImage: newImage
}
};
function newImage(element) {
return {
inline: inline
};
function inline(get) {
if (util.isDataUrl(element.src)) return Promise.resolve();
return Promise.resolve(element.src)
.then(get || util.getAndEncode)
.then(function (data) {
return util.dataAsUrl(data, util.mimeType(element.src));
})
.then(function (dataUrl) {
return new Promise(function (resolve, reject) {
element.onload = resolve;
element.onerror = reject;
element.src = dataUrl;
});
});
}
}
function inlineAll(node) {
if (!(node instanceof Element)) return Promise.resolve(node);
return inlineBackground(node)
.then(function () {
if (node instanceof HTMLImageElement)
return newImage(node).inline();
else
return Promise.all(
util.asArray(node.childNodes).map(function (child) {
return inlineAll(child);
})
);
});
function inlineBackground(node) {
// Fix MathJax issue.
if (!node.style) {
return Promise.resolve(node);
}
var background = node.style.getPropertyValue('background');
if (!background) return Promise.resolve(node);
return inliner.inlineAll(background)
.then(function (inlined) {
node.style.setProperty(
'background',
inlined,
node.style.getPropertyPriority('background')
);
})
.then(function () {
return node;
});
}
}
}
})(this);

25
src/utils/vutils.cpp
View File

@ -815,6 +815,31 @@ QString VUtils::generateExportHtmlTemplate(const QString &p_renderBg, bool p_inc
return templ; return templ;
} }
QString VUtils::generateMathJaxPreviewTemplate()
{
QString templ = VNote::generateMathJaxPreviewTemplate();
QString mj = g_config->getMathjaxJavascript();
// Chante MathJax to be rendered as SVG.
QRegExp reg("(Mathjax\\.js\\?config=)\\S+", Qt::CaseInsensitive);
// mj.replace(reg, QString("\\1%1").arg("TeX-MML-AM_SVG"));
templ.replace(HtmlHolder::c_JSHolder, mj);
QString extraFile;
extraFile += "<script type=\"text/x-mathjax-config\">"
"MathJax.Hub.Config({\n"
" tex2jax: {inlineMath: [['$','$'], ['\\\\(','\\\\)']],\n"
"processEscapes: true,\n"
"processClass: \"tex2jax_process|language-mathjax|lang-mathjax\"},\n"
" showProcessingMessages: false,\n"
" messageStyle: \"none\"});\n"
"</script>\n";
templ.replace(HtmlHolder::c_extraHolder, extraFile);
return templ;
}
QString VUtils::getFileNameWithSequence(const QString &p_directory, QString VUtils::getFileNameWithSequence(const QString &p_directory,
const QString &p_baseFileName, const QString &p_baseFileName,
bool p_completeBaseName) bool p_completeBaseName)

3
src/utils/vutils.h
View File

@ -186,6 +186,9 @@ public:
static QString generateSimpleHtmlTemplate(const QString &p_body); static QString generateSimpleHtmlTemplate(const QString &p_body);
// Generate template for MathJax preview.
static QString generateMathJaxPreviewTemplate();
// Get an available file name in @p_directory with base @p_baseFileName. // Get an available file name in @p_directory with base @p_baseFileName.
// If there already exists a file named @p_baseFileName, try to add sequence // If there already exists a file named @p_baseFileName, try to add sequence
// suffix to the name, such as _001. // suffix to the name, such as _001.

3
src/vconstants.h
View File

@ -36,6 +36,9 @@ static const int c_tabSequenceBase = 1;
namespace HtmlHolder namespace HtmlHolder
{ {
static const QString c_JSHolder = "JS_PLACE_HOLDER"; static const QString c_JSHolder = "JS_PLACE_HOLDER";
static const QString c_cssHolder = "CSS_PLACE_HOLDER";
static const QString c_codeBlockCssHolder = "HIGHLIGHTJS_CSS_PLACE_HOLDER";
static const QString c_globalStyleHolder = "/* BACKGROUND_PLACE_HOLDER */";
static const QString c_extraHolder = "<!-- EXTRA_PLACE_HOLDER -->"; static const QString c_extraHolder = "<!-- EXTRA_PLACE_HOLDER -->";
static const QString c_bodyHolder = "<!-- BODY_PLACE_HOLDER -->"; static const QString c_bodyHolder = "<!-- BODY_PLACE_HOLDER -->";
static const QString c_headHolder = "<!-- HEAD_PLACE_HOLDER -->"; static const QString c_headHolder = "<!-- HEAD_PLACE_HOLDER -->";

7
src/veditarea.cpp
View File

@ -1,5 +1,7 @@
#include <QtWidgets>
#include "veditarea.h" #include "veditarea.h"
#include <QtWidgets>
#include "veditwindow.h" #include "veditwindow.h"
#include "vedittab.h" #include "vedittab.h"
#include "vnote.h" #include "vnote.h"
@ -11,6 +13,7 @@
#include "vmainwindow.h" #include "vmainwindow.h"
#include "vcaptain.h" #include "vcaptain.h"
#include "vfilelist.h" #include "vfilelist.h"
#include "vmathjaxpreviewhelper.h"
extern VConfigManager *g_config; extern VConfigManager *g_config;
@ -64,6 +67,8 @@ VEditArea::VEditArea(QWidget *parent)
timer->start(); timer->start();
m_autoSave = g_config->getEnableAutoSave(); m_autoSave = g_config->getEnableAutoSave();
m_mathPreviewHelper = new VMathJaxPreviewHelper(this, this);
} }
void VEditArea::setupUI() void VEditArea::setupUI()

9
src/veditarea.h
View File

@ -20,6 +20,7 @@ class VDirectory;
class VFindReplaceDialog; class VFindReplaceDialog;
class QLabel; class QLabel;
class VVim; class VVim;
class VMathJaxPreviewHelper;
class VEditArea : public QWidget, public VNavigationMode class VEditArea : public QWidget, public VNavigationMode
{ {
@ -86,6 +87,8 @@ public:
// Return the rect not containing the tab bar. // Return the rect not containing the tab bar.
QRect editAreaRect() const; QRect editAreaRect() const;
VMathJaxPreviewHelper *getMathJaxPreviewHelper() const;
signals: signals:
// Emit when current window's tab status updated. // Emit when current window's tab status updated.
void tabStatusUpdated(const VEditTabInfo &p_info); void tabStatusUpdated(const VEditTabInfo &p_info);
@ -224,6 +227,8 @@ private:
// Whether auto save files. // Whether auto save files.
bool m_autoSave; bool m_autoSave;
VMathJaxPreviewHelper *m_mathPreviewHelper;
}; };
inline VEditWindow* VEditArea::getWindow(int windowIndex) const inline VEditWindow* VEditArea::getWindow(int windowIndex) const
@ -242,4 +247,8 @@ inline VFindReplaceDialog *VEditArea::getFindReplaceDialog() const
return m_findReplace; return m_findReplace;
} }
inline VMathJaxPreviewHelper *VEditArea::getMathJaxPreviewHelper() const
{
return m_mathPreviewHelper;
}
#endif // VEDITAREA_H #endif // VEDITAREA_H

53
src/vlivepreviewhelper.cpp
View File

@ -1,6 +1,7 @@
#include "vlivepreviewhelper.h" #include "vlivepreviewhelper.h"
#include <QDebug> #include <QDebug>
#include <QByteArray>
#include "veditor.h" #include "veditor.h"
#include "vdocument.h" #include "vdocument.h"
@ -8,12 +9,18 @@
#include "vgraphvizhelper.h" #include "vgraphvizhelper.h"
#include "vplantumlhelper.h" #include "vplantumlhelper.h"
#include "vcodeblockhighlighthelper.h" #include "vcodeblockhighlighthelper.h"
#include "vmainwindow.h"
#include "veditarea.h"
#include "vmathjaxpreviewhelper.h"
extern VConfigManager *g_config; extern VConfigManager *g_config;
extern VMainWindow *g_mainWin;
// Use the highest 4 bits (31-28) to indicate the lang. // Use the highest 4 bits (31-28) to indicate the lang.
#define LANG_PREFIX_GRAPHVIZ 0x10000000UL #define LANG_PREFIX_GRAPHVIZ 0x10000000UL
#define LANG_PREFIX_PLANTUML 0x20000000UL #define LANG_PREFIX_PLANTUML 0x20000000UL
#define LANG_PREFIX_MATHJAX 0x30000000UL
#define LANG_PREFIX_MASK 0xf0000000UL #define LANG_PREFIX_MASK 0xf0000000UL
// Use th 27th bit to indicate the preview type. // Use th 27th bit to indicate the preview type.
@ -105,6 +112,11 @@ VLivePreviewHelper::VLivePreviewHelper(VEditor *p_editor,
m_plantUMLMode = g_config->getPlantUMLMode(); m_plantUMLMode = g_config->getPlantUMLMode();
m_graphvizEnabled = g_config->getEnableGraphviz(); m_graphvizEnabled = g_config->getEnableGraphviz();
m_mathjaxEnabled = g_config->getEnableMathjax(); m_mathjaxEnabled = g_config->getEnableMathjax();
m_mathJaxHelper = g_mainWin->getEditArea()->getMathJaxPreviewHelper();
m_mathJaxID = m_mathJaxHelper->registerIdentifier();
connect(m_mathJaxHelper, &VMathJaxPreviewHelper::mathjaxPreviewResultReady,
this, &VLivePreviewHelper::mathjaxPreviewResultReady);
} }
bool VLivePreviewHelper::isPreviewLang(const QString &p_lang) const bool VLivePreviewHelper::isPreviewLang(const QString &p_lang) const
@ -246,7 +258,8 @@ void VLivePreviewHelper::updateLivePreview()
} else { } else {
m_document->setPreviewContent(vcb.m_lang, cb.imageData()); m_document->setPreviewContent(vcb.m_lang, cb.imageData());
} }
} else if (vcb.m_lang != "puml") { } else if (vcb.m_lang != "mathjax") {
// No need to live preview MathJax.
m_document->previewCodeBlock(m_cbIndex, m_document->previewCodeBlock(m_cbIndex,
vcb.m_lang, vcb.m_lang,
removeFence(vcb.m_text), removeFence(vcb.m_text),
@ -365,6 +378,10 @@ void VLivePreviewHelper::processForInplacePreview(int p_idx)
vcb.m_lang, vcb.m_lang,
removeFence(vcb.m_text), removeFence(vcb.m_text),
false); false);
} else if (vcb.m_lang == "mathjax") {
m_mathJaxHelper->previewMathJax(m_mathJaxID,
p_idx,
removeFence(vcb.m_text));
} }
} }
@ -373,12 +390,17 @@ void VLivePreviewHelper::updateInplacePreview()
QVector<QSharedPointer<VImageToPreview> > images; QVector<QSharedPointer<VImageToPreview> > images;
for (int i = 0; i < m_codeBlocks.size(); ++i) { for (int i = 0; i < m_codeBlocks.size(); ++i) {
CodeBlockPreviewInfo &cb = m_codeBlocks[i]; CodeBlockPreviewInfo &cb = m_codeBlocks[i];
if (cb.inplacePreviewReady() && cb.hasImageData()) { if (cb.inplacePreviewReady()) {
Q_ASSERT(!cb.inplacePreview().isNull());
// Generate the image. // Generate the image.
cb.inplacePreview()->m_image.loadFromData(cb.imageData().toUtf8(), if (cb.hasImageData()) {
cb.imageFormat().toLocal8Bit().data()); cb.inplacePreview()->m_image.loadFromData(cb.imageData().toUtf8(),
images.append(cb.inplacePreview()); cb.imageFormat().toLocal8Bit().data());
images.append(cb.inplacePreview());
} else if (cb.hasImageDataBa()) {
cb.inplacePreview()->m_image.loadFromData(cb.imageDataBa(),
cb.imageFormat().toLocal8Bit().data());
images.append(cb.inplacePreview());
}
} }
} }
@ -387,7 +409,8 @@ void VLivePreviewHelper::updateInplacePreview()
// Clear image. // Clear image.
for (int i = 0; i < m_codeBlocks.size(); ++i) { for (int i = 0; i < m_codeBlocks.size(); ++i) {
CodeBlockPreviewInfo &cb = m_codeBlocks[i]; CodeBlockPreviewInfo &cb = m_codeBlocks[i];
if (cb.inplacePreviewReady() && cb.hasImageData()) { if (cb.inplacePreviewReady()
&& (cb.hasImageData() || cb.hasImageDataBa())) {
cb.inplacePreview()->m_image = QPixmap(); cb.inplacePreview()->m_image = QPixmap();
} }
} }
@ -407,3 +430,19 @@ void VLivePreviewHelper::webAsyncResultReady(int p_id,
cb.updateInplacePreview(m_editor, m_doc); cb.updateInplacePreview(m_editor, m_doc);
updateInplacePreview(); updateInplacePreview();
} }
void VLivePreviewHelper::mathjaxPreviewResultReady(int p_identitifer,
int p_id,
const QString &p_format,
const QByteArray &p_data)
{
if (p_identitifer != m_mathJaxID
|| (p_id >= m_codeBlocks.size() || p_data.isEmpty())) {
return;
}
CodeBlockPreviewInfo &cb = m_codeBlocks[p_id];
cb.setImageDataBa(p_format, p_data);
cb.updateInplacePreview(m_editor, m_doc);
updateInplacePreview();
}

33
src/vlivepreviewhelper.h
View File

@ -11,6 +11,7 @@ class VEditor;
class VDocument; class VDocument;
class VGraphvizHelper; class VGraphvizHelper;
class VPlantUMLHelper; class VPlantUMLHelper;
class VMathJaxPreviewHelper;
class CodeBlockPreviewInfo class CodeBlockPreviewInfo
{ {
@ -57,6 +58,16 @@ public:
return m_imgData; return m_imgData;
} }
bool hasImageDataBa() const
{
return !m_imgDataBa.isEmpty();
}
const QByteArray &imageDataBa() const
{
return m_imgDataBa;
}
const QString &imageFormat() const const QString &imageFormat() const
{ {
return m_imgFormat; return m_imgFormat;
@ -64,10 +75,20 @@ public:
void setImageData(const QString &p_format, const QString &p_data) void setImageData(const QString &p_format, const QString &p_data)
{ {
m_imgDataBa.clear();
m_imgFormat = p_format; m_imgFormat = p_format;
m_imgData = p_data; m_imgData = p_data;
} }
void setImageDataBa(const QString &p_format, const QByteArray &p_data)
{
m_imgData.clear();
m_imgFormat = p_format;
m_imgDataBa = p_data;
}
const QSharedPointer<VImageToPreview> inplacePreview() const const QSharedPointer<VImageToPreview> inplacePreview() const
{ {
return m_inplacePreview; return m_inplacePreview;
@ -84,6 +105,8 @@ private:
QString m_imgData; QString m_imgData;
QByteArray m_imgDataBa;
QString m_imgFormat; QString m_imgFormat;
QSharedPointer<VImageToPreview> m_inplacePreview; QSharedPointer<VImageToPreview> m_inplacePreview;
@ -120,6 +143,11 @@ private slots:
void localAsyncResultReady(int p_id, const QString &p_format, const QString &p_result); void localAsyncResultReady(int p_id, const QString &p_format, const QString &p_result);
void mathjaxPreviewResultReady(int p_identitifer,
int p_id,
const QString &p_format,
const QByteArray &p_data);
private: private:
bool isPreviewLang(const QString &p_lang) const; bool isPreviewLang(const QString &p_lang) const;
@ -154,6 +182,11 @@ private:
VGraphvizHelper *m_graphvizHelper; VGraphvizHelper *m_graphvizHelper;
VPlantUMLHelper *m_plantUMLHelper; VPlantUMLHelper *m_plantUMLHelper;
VMathJaxPreviewHelper *m_mathJaxHelper;
// Identification for VMathJaxPreviewHelper.
int m_mathJaxID;
}; };
inline bool VLivePreviewHelper::isPreviewEnabled() const inline bool VLivePreviewHelper::isPreviewEnabled() const

64
src/vmathjaxpreviewhelper.cpp Normal file
View File

@ -0,0 +1,64 @@
#include "vmathjaxpreviewhelper.h"
#include <QDebug>
#include <QWebEngineView>
#include <QWebChannel>
#include "utils/vutils.h"
#include "vmathjaxwebdocument.h"
VMathJaxPreviewHelper::VMathJaxPreviewHelper(QWidget *p_parentWidget, QObject *p_parent)
: QObject(p_parent),
m_parentWidget(p_parentWidget),
m_initialized(false),
m_nextID(0),
m_webView(NULL),
m_webReady(false)
{
}
VMathJaxPreviewHelper::~VMathJaxPreviewHelper()
{
}
void VMathJaxPreviewHelper::doInit()
{
Q_ASSERT(!m_initialized);
m_webView = new QWebEngineView(m_parentWidget);
connect(m_webView, &QWebEngineView::loadFinished,
this, [this]() {
m_webReady = true;
});
m_webView->hide();
m_webView->setFocusPolicy(Qt::NoFocus);
m_webDoc = new VMathJaxWebDocument(m_webView);
connect(m_webDoc, &VMathJaxWebDocument::mathjaxPreviewResultReady,
this, [this](int p_identifier, int p_id, const QString &p_format, const QString &p_data) {
QByteArray ba = QByteArray::fromBase64(p_data.toUtf8());
emit mathjaxPreviewResultReady(p_identifier, p_id, p_format, ba);
});
QWebChannel *channel = new QWebChannel(m_webView);
channel->registerObject(QStringLiteral("content"), m_webDoc);
m_webView->page()->setWebChannel(channel);
m_webView->setHtml(VUtils::generateMathJaxPreviewTemplate(), QUrl("qrc:/resources"));
while (!m_webReady) {
VUtils::sleepWait(100);
}
m_initialized = true;
}
void VMathJaxPreviewHelper::previewMathJax(int p_identifier,
int p_id,
const QString &p_text)
{
init();
m_webDoc->previewMathJax(p_identifier, p_id, p_text);
}

62
src/vmathjaxpreviewhelper.h Normal file
View File

@ -0,0 +1,62 @@
#ifndef VMATHJAXPREVIEWHELPER_H
#define VMATHJAXPREVIEWHELPER_H
#include <QObject>
class QWebEngineView;
class VMathJaxWebDocument;
class QWidget;
class VMathJaxPreviewHelper : public QObject
{
Q_OBJECT
public:
explicit VMathJaxPreviewHelper(QWidget *p_parentWidget, QObject *p_parent = nullptr);
~VMathJaxPreviewHelper();
// Get an ID for identification.
int registerIdentifier();
// Preview @p_text and return SVG data asynchronously.
// @p_identifier: identifier the caller registered;
// @p_id: internal id for each caller;
// @p_text: raw text of the MathJax script.
void previewMathJax(int p_identifier, int p_id, const QString &p_text);
signals:
void mathjaxPreviewResultReady(int p_identifier,
int p_id,
const QString &p_format,
const QByteArray &p_data);
private:
void init();
void doInit();
QWidget *m_parentWidget;
int m_initialized;
int m_nextID;
QWebEngineView *m_webView;
VMathJaxWebDocument *m_webDoc;
bool m_webReady;
};
inline int VMathJaxPreviewHelper::registerIdentifier()
{
return m_nextID++;
}
inline void VMathJaxPreviewHelper::init()
{
if (!m_initialized) {
doInit();
}
}
#endif // VMATHJAXPREVIEWHELPER_H

23
src/vmathjaxwebdocument.cpp Normal file
View File

@ -0,0 +1,23 @@
#include "vmathjaxwebdocument.h"
#include <QDebug>
VMathJaxWebDocument::VMathJaxWebDocument(QObject *p_parent)
: QObject(p_parent)
{
}
void VMathJaxWebDocument::previewMathJax(int p_identifier,
int p_id,
const QString &p_text)
{
emit requestPreviewMathJax(p_identifier, p_id, p_text);
}
void VMathJaxWebDocument::mathjaxResultReady(int p_identifier,
int p_id,
const QString &p_format,
const QString &p_data)
{
emit mathjaxPreviewResultReady(p_identifier, p_id, p_format, p_data);
}

31
src/vmathjaxwebdocument.h Normal file
View File

@ -0,0 +1,31 @@
#ifndef VMATHJAXWEBDOCUMENT_H
#define VMATHJAXWEBDOCUMENT_H
#include <QObject>
class VMathJaxWebDocument : public QObject
{
Q_OBJECT
public:
explicit VMathJaxWebDocument(QObject *p_parent = nullptr);
void previewMathJax(int p_identifier, int p_id, const QString &p_text);
public slots:
// Will be called in the HTML side
void mathjaxResultReady(int p_identifier,
int p_id,
const QString &p_format,
const QString &p_data);
signals:
void requestPreviewMathJax(int p_identifier, int p_id, const QString &p_text);
void mathjaxPreviewResultReady(int p_identifier,
int p_id,
const QString &p_format,
const QString &p_data);
};
#endif // VMATHJAXWEBDOCUMENT_H

23
src/vnote.cpp
View File

@ -111,16 +111,12 @@ QString VNote::generateHtmlTemplate(const QString &p_renderBg,
cssStyle += "img { max-width: 100% !important; height: auto !important; }\n"; cssStyle += "img { max-width: 100% !important; height: auto !important; }\n";
} }
const QString styleHolder("/* BACKGROUND_PLACE_HOLDER */");
const QString cssHolder("CSS_PLACE_HOLDER");
const QString codeBlockCssHolder("HIGHLIGHTJS_CSS_PLACE_HOLDER");
QString templ = VUtils::readFileFromDisk(c_markdownTemplatePath); QString templ = VUtils::readFileFromDisk(c_markdownTemplatePath);
g_palette->fillStyle(templ); g_palette->fillStyle(templ);
// Must replace the code block holder first. // Must replace the code block holder first.
templ.replace(codeBlockCssHolder, p_codeBlockStyleUrl); templ.replace(HtmlHolder::c_codeBlockCssHolder, p_codeBlockStyleUrl);
templ.replace(cssHolder, p_renderStyleUrl); templ.replace(HtmlHolder::c_cssHolder, p_renderStyleUrl);
if (p_isPDF) { if (p_isPDF) {
// Shoudl not display scrollbar in PDF. // Shoudl not display scrollbar in PDF.
@ -143,7 +139,7 @@ QString VNote::generateHtmlTemplate(const QString &p_renderBg,
} }
if (!cssStyle.isEmpty()) { if (!cssStyle.isEmpty()) {
templ.replace(styleHolder, cssStyle); templ.replace(HtmlHolder::c_globalStyleHolder, cssStyle);
} }
return templ; return templ;
@ -163,18 +159,25 @@ QString VNote::generateExportHtmlTemplate(const QString &p_renderBg)
cssStyle += "img { max-width: 100% !important; height: auto !important; }\n"; cssStyle += "img { max-width: 100% !important; height: auto !important; }\n";
} }
const QString styleHolder("/* BACKGROUND_PLACE_HOLDER */");
QString templ = VUtils::readFileFromDisk(c_exportTemplatePath); QString templ = VUtils::readFileFromDisk(c_exportTemplatePath);
g_palette->fillStyle(templ); g_palette->fillStyle(templ);
if (!cssStyle.isEmpty()) { if (!cssStyle.isEmpty()) {
templ.replace(styleHolder, cssStyle); templ.replace(HtmlHolder::c_globalStyleHolder, cssStyle);
} }
return templ; return templ;
} }
QString VNote::generateMathJaxPreviewTemplate()
{
const QString c_templatePath(":/resources/mathjax_preview_template.html");
QString templ = VUtils::readFileFromDisk(c_templatePath);
g_palette->fillStyle(templ);
templ.replace(HtmlHolder::c_cssHolder, g_config->getCssStyleUrl());
return templ;
}
void VNote::updateTemplate() void VNote::updateTemplate()
{ {
QString renderBg = g_config->getRenderBackgroundColor(g_config->getCurRenderBackgroundColor()); QString renderBg = g_config->getRenderBackgroundColor(g_config->getCurRenderBackgroundColor());

2
src/vnote.h
View File

@ -114,6 +114,8 @@ public:
// @p_renderBg: background color, empty to not specify given color. // @p_renderBg: background color, empty to not specify given color.
static QString generateExportHtmlTemplate(const QString &p_renderBg); static QString generateExportHtmlTemplate(const QString &p_renderBg);
static QString generateMathJaxPreviewTemplate();
public slots: public slots:
void updateTemplate(); void updateTemplate();

3
src/vnote.qrc
View File

@ -210,5 +210,8 @@
<file>resources/themes/v_moonlight/radiobutton_checked_disabled.svg</file> <file>resources/themes/v_moonlight/radiobutton_checked_disabled.svg</file>
<file>resources/themes/v_moonlight/radiobutton_unchecked_disabled.svg</file> <file>resources/themes/v_moonlight/radiobutton_unchecked_disabled.svg</file>
<file>resources/icons/universal_entry_tb.svg</file> <file>resources/icons/universal_entry_tb.svg</file>
<file>resources/mathjax_preview.js</file>
<file>resources/mathjax_preview_template.html</file>
<file>utils/dom-to-image/dom-to-image.js</file>
</qresource> </qresource>
</RCC> </RCC>