86 lines
2.7 KiB
QML
86 lines
2.7 KiB
QML
import QtQml 2.0
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QtObject {
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property int maxWidth;
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property variant settingsVariables: [{
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"identifier": "maxWidth",
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"name": "Max width for image preview",
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"description": "Note that when the original image width is unknown (e.g. when using Markdown-it), images with a smaller width than this setting will be blown-up. This can not be prevented right now.",
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"type": "integer",
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"default": "640",
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}];
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/**
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* This function is called when the markdown html of a note is generated
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*
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* It allows you to modify this html
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* This is for example called before by the note preview
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*
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* @param {Note} note - the note object
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* @param {string} html - the html that is about to being rendered
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* @return {string} the modfied html or an empty string if nothing should be modified
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*/
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function noteToMarkdownHtmlHook(note, html) {
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/**
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* This script does two things:
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* 1) Display the image with an user defined width;
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* 2) Wrap the image in an anchor tag that links to the full size image.
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* TODO: do not resize the image when it does not have a width attribute
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* AND is smaller than the maxWidth. Wrapping an image in a table with
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* `<td width="640">` does not work.
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*/
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html = html.replace(/<img(?:.[^>]*)/g, handleImg);
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// script.log(html);
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return html;
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}
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/**
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* Handle image.
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* @param imgTag
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* @returns {string}
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*/
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function handleImg(imgTag) {
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var src = getImgSrc(imgTag);
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imgTag = handleWidth(imgTag);
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return '<a href="' + src + '">' + imgTag + '></a';
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}
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/**
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* Handle width attribute.
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* @param imgTag
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* @returns {*}
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*/
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function handleWidth(imgTag) {
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// Check if the img tag has a width attribute set.
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var widthMatch = /(?:width=")(.[^"]*)/g.exec(imgTag);
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// If the width attribute is larger than maxWidth, change.
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if (widthMatch) {
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var width = widthMatch[1];
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if (width > maxWidth) {
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imgTag = imgTag.replace(widthMatch[0], 'width="' + maxWidth);
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}
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}
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// No width attribute, add one.
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// TODO: blows up the image when original is smaller than maxWidth.
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// This occurs when using Markdown-it for example.
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else {
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imgTag = imgTag.replace('<img', '<img width="' + maxWidth + '" ');
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}
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return imgTag;
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}
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/**
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* Get image src attribute.
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* @param imgTag
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* @returns {string}
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*/
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function getImgSrc(imgTag) {
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var srcMatch = /(?:src=")(.[^"]*)/g.exec(imgTag);
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var src = srcMatch[1];
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return src;
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}
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}
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