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mirror of https://github.com/laurent22/joplin.git synced 2024-12-15 09:04:04 +02:00
joplin/ElectronClient/app/gui/note-viewer/index.html

442 lines
12 KiB
HTML

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
body {
overflow: hidden;
}
#content {
overflow-y: auto;
height: 100%;
padding-left: 10px;
padding-right: 10px;
}
mark {
background: #F3B717;
color: black;
}
.mark-selected {
background: #CF3F00;
color: white;
}
ul ul, ul ol, ol ul, ol ol {
margin-bottom: 0px;
}
.katex { font-size: 1.3em; } /* This controls the global Katex font size*/
</style>
</head>
<body id="body">
<div id="hlScriptContainer"></div>
<div id="markScriptContainer"></div>
<div id="content" ondragstart="return false;" ondrop="return false;"></div>
<script>
const contentElement = document.getElementById('content');
const ipc = {};
window.addEventListener('message', (event) => {
// Here we only deal with messages that are sent from the main Electro process to the webview.
if (!event.data || event.data.target !== 'webview') return;
const callName = event.data.name;
const callData = event.data.data;
if (!ipc[callName]) {
console.warn('Missing IPC function:', event.data);
} else {
ipc[callName](callData);
}
});
// ----------------------------------------------------------------------
// Handle dynamically loading HLJS when a code element is present
// ----------------------------------------------------------------------
let hljsScriptAdded = false;
let hljsLoaded = false;
function loadHljs(options) {
hljsScriptAdded = true;
const script = document.createElement('script');
script.onload = function () {
hljsLoaded = true;
applyHljs();
};
script.src = 'highlight/highlight.pack.js';
document.getElementById('hlScriptContainer').appendChild(script);
const link = document.createElement('link');
link.rel = 'stylesheet';
// https://ace.c9.io/build/kitchen-sink.html
// https://highlightjs.org/static/demo/
link.href = 'highlight/styles/' + options.codeTheme;
document.getElementById('hlScriptContainer').appendChild(link);
}
function loadAndApplyHljs(options) {
var codeElements = document.getElementsByClassName('code');
if (!codeElements.length) return;
if (!hljsScriptAdded) {
this.loadHljs(options);
return;
}
// If HLJS is not loaded yet, no need to do anything. When it loads
// it will automatically apply the style to all the code elements.
if (hljsLoaded) applyHljs(codeElements);
}
function applyHljs(codeElements) {
if (typeof codeElements === 'undefined') codeElements = document.getElementsByClassName('code');
for (var i = 0; i < codeElements.length; i++) {
try {
hljs.highlightBlock(codeElements[i]);
} catch (error) {
console.warn('Cannot highlight code', error);
}
}
}
// ----------------------------------------------------------------------
// / Handle dynamically loading HLJS when a code element is present
// ----------------------------------------------------------------------
// Note: the scroll position source of truth is "percentScroll_". This is easier to manage than scrollTop because
// the scrollTop value depends on the images being loaded or not. For example, if the scrollTop is saved while
// images are being displayed then restored while images are being reloaded, the new scrollTop might be changed
// so that it is not greater than contentHeight. On the other hand, with percentScroll it is possible to restore
// it at any time knowing that it's not going to be changed because the content height has changed.
// To restore percentScroll the "checkScrollIID" interval is used. It constantly resets the scroll position during
// one second after the content has been updated.
//
// ignoreNextScroll is used to differentiate between scroll event from the users and those that are the result
// of programmatically changing scrollTop. We only want to respond to events initiated by the user.
let percentScroll_ = 0;
let checkScrollIID_ = null;
function setPercentScroll(percent) {
percentScroll_ = percent;
contentElement.scrollTop = percentScroll_ * maxScrollTop();
}
function percentScroll() {
return percentScroll_;
}
function restorePercentScroll() {
setPercentScroll(percentScroll_);
}
ipc.setHtml = (event) => {
const html = event.html;
markJsHackMarkerInserted_ = false;
updateBodyHeight();
contentElement.innerHTML = html;
loadAndApplyHljs(event.options);
// Remove the bullet from "ul" for checkbox lists and extra padding
// const checkboxes = document.getElementsByClassName('checkbox');
// for (let i = 0; i < checkboxes.length; i++) {
// const cb = checkboxes[i];
// const ul = cb.parentElement.parentElement;
// if (!ul) {
// console.warn('Unexpected layout for checkbox');
// continue;
// }
// ul.style.listStyleType = 'none';
// ul.style.paddingLeft = 0;
// }
let previousContentHeight = contentElement.scrollHeight;
let startTime = Date.now();
ignoreNextScrollEvent = true;
restorePercentScroll();
if (!checkScrollIID_) {
checkScrollIID_ = setInterval(() => {
const h = contentElement.scrollHeight;
if (h !== previousContentHeight) {
previousContentHeight = h;
ignoreNextScrollEvent = true;
restorePercentScroll();
}
if (Date.now() - startTime >= 1000) {
clearInterval(checkScrollIID_);
checkScrollIID_ = null;
}
}, 1);
}
}
let ignoreNextScrollEvent = false;
ipc.setPercentScroll = (event) => {
const percent = event.percent;
if (checkScrollIID_) {
clearInterval(checkScrollIID_);
checkScrollIID_ = null;
}
ignoreNextScrollEvent = true;
setPercentScroll(percent);
}
// HACK for Mark.js bug - https://github.com/julmot/mark.js/issues/127
let markJsHackMarkerInserted_ = false;
function addMarkJsSpaceHack(document) {
if (markJsHackMarkerInserted_) return;
const prepareElementsForMarkJs = (elements, type) => {
// const markJsHackMarker_ = '&#8203; &#8203;'
const markJsHackMarker_ = ' ';
for (let i = 0; i < elements.length; i++) {
if (!type) {
elements[i].innerHTML = elements[i].innerHTML + markJsHackMarker_;
} else if (type === 'insertBefore') {
elements[i].insertAdjacentHTML('beforeBegin', markJsHackMarker_);
}
}
}
prepareElementsForMarkJs(document.getElementsByTagName('p'));
prepareElementsForMarkJs(document.getElementsByTagName('div'));
prepareElementsForMarkJs(document.getElementsByTagName('br'), 'insertBefore');
markJsHackMarkerInserted_ = true;
}
let mark_ = null;
let markSelectedElement_ = null;
function setMarkers(keywords, options = null) {
if (!options) options = {};
// TODO: It should highlight queries without accents - eg "penche*" should highlight "penchés"
// TODO: It should highlight Chinese, Japanese characters, etc.
// TODO: It should highlight Russian
// TODO: not working - "oue*" doesn't highlight "ouéé"
// TODO: Search engine support to mobile app (sync tables)
// TODO: Update everywhere that uses allParsedQueryTerms to support new format
// TODO: Add support for scriptType on mobile and CLI
if (!mark_) {
mark_ = new Mark(document.getElementById('content'), {
exclude: ['img'],
acrossElements: true,
});
}
addMarkJsSpaceHack(document);
mark_.unmark()
if (markSelectedElement_) markSelectedElement_.classList.remove('mark-selected');
let selectedElement = null;
let elementIndex = 0;
const onEachElement = (element) => {
if (!('selectedIndex' in options)) return;
if (('selectedIndex' in options) && elementIndex === options.selectedIndex) {
markSelectedElement_ = element;
element.classList.add('mark-selected');
selectedElement = element;
}
elementIndex++;
}
for (let i = 0; i < keywords.length; i++) {
let keyword = keywords[i];
if (typeof keyword === 'string') {
keyword = {
type: 'text',
value: keyword,
};
}
const isBasicSearch = ['ja', 'zh', 'ko'].indexOf(keyword.scriptType) >= 0;
if (keyword.type === 'regex') {
let regexString = '\\b' + keyword.value + '\\b';
if (isBasicSearch) regexString = keyword.value;
mark_.markRegExp(new RegExp(regexString, 'gmi'), {
each: onEachElement,
acrossElements: true,
});
} else {
let accuracy = keyword.accuracy ? keyword.accuracy : 'exactly';
if (isBasicSearch) accuracy = 'partially';
mark_.mark([keyword.value], {
each: onEachElement,
accuracy: accuracy,
});
}
}
ipcProxySendToHost('setMarkerCount', elementIndex);
if (selectedElement) selectedElement.scrollIntoView();
}
let markLoaded_ = false;
ipc.setMarkers = (event) => {
const keywords = event.keywords;
const options = event.options;
if (!keywords.length && !markLoaded_) return;
if (!markLoaded_) {
const script = document.createElement('script');
script.onload = function() {
setMarkers(keywords, options);
};
script.src = '../../node_modules/mark.js/dist/mark.min.js';
document.getElementById('markScriptContainer').appendChild(script);
markLoaded_ = true;
} else {
setMarkers(keywords, options);
}
}
function maxScrollTop() {
return Math.max(0, contentElement.scrollHeight - contentElement.clientHeight);
}
// The body element needs to have a fixed height for the content to be scrollable
function updateBodyHeight() {
document.getElementById('body').style.height = window.innerHeight + 'px';
}
const ipcProxySendToHost = (methodName, arg) => {
window.postMessage({ target: 'main', name: methodName, args: [ arg ] }, '*');
}
contentElement.addEventListener('scroll', function(e) {
if (ignoreNextScrollEvent) {
ignoreNextScrollEvent = false;
return;
}
const m = maxScrollTop();
const percent = m ? contentElement.scrollTop / m : 0;
setPercentScroll(percent);
ipcProxySendToHost('percentScroll', percent);
});
document.addEventListener('contextmenu', function(event) {
let element = event.target;
// To handle right clicks on resource icons
if (element && !element.getAttribute('data-resource-id')) element = element.parentElement;
if (element && element.getAttribute('data-resource-id')) {
ipcProxySendToHost('contextMenu', {
type: element.getAttribute('src') ? 'image' : 'resource',
resourceId: element.getAttribute('data-resource-id'),
});
} else {
const selectedText = window.getSelection().toString();
if (selectedText) {
ipcProxySendToHost('contextMenu', {
type: 'text',
textToCopy: selectedText,
});
} else if (event.target.getAttribute('href')) {
ipcProxySendToHost('contextMenu', {
type: 'link',
textToCopy: event.target.getAttribute('href'),
});
}
}
});
function handleInternalLink(event, anchorNode) {
const href = anchorNode.getAttribute('href');
if (href.indexOf('#') === 0) {
event.preventDefault();
location.hash = href;
return true;
}
return false;
}
function getParentAnchorElement(element) {
let counter = 0;
while (true) {
if (counter++ >= 10000) {
console.warn('been looping for too long - exiting')
return null;
}
if (!element) return null;
if (element.nodeName === 'A') return element;
element = element.parentElement;
}
}
document.addEventListener('click', function(event) {
const anchor = getParentAnchorElement(event.target);
if (!anchor) return;
// Prevent URLs added via <a> tags from being opened within the application itself
// otherwise it would open the whole website within the WebView.
if (!anchor.hasAttribute('data-from-md')) {
if (handleInternalLink(event, anchor)) return;
event.preventDefault();
ipcProxySendToHost(anchor.getAttribute('href'));
return;
}
// If this is an internal link, jump to the anchor directly
if (anchor.hasAttribute('data-from-md')) {
if (handleInternalLink(event, anchor)) return;
}
});
// Disable drag and drop otherwise it's possible to drop a URL
// on it and it will open in the view as a website.
document.addEventListener('drop', function(e) {
e.preventDefault();
e.stopPropagation();
});
document.addEventListener('dragover', function(e) {
e.preventDefault();
e.stopPropagation();
});
document.addEventListener('dragover', function(e) {
e.preventDefault();
});
window.addEventListener('resize', function() {
updateBodyHeight();
});
updateBodyHeight();
</script>
</body>
</html>