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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| mixin webp-img(src, title, alt, picture_style, img_style) | ||
|
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||
| //- remove img src path suffix | ||
| - var path_nosuffix = src.replace(/[.][a-z]+/,""); | ||
| //- get absolute path from the src path and remove suffix | ||
| - var absolute_path = (path.resolve("./contents"+src.match(/\/media.+/, ""))); | ||
| - var absolute_nosuffix = absolute_path.replace(/[.][a-z]+/,""); | ||
|
|
||
| //- sources is an array of [str : image_type/suffix, bool : file exists] | ||
| //- The order of this array is important as it specifies the order we want sources within the picture element. | ||
| - var sources = [["webp", false],["jpg", false],["png", false]]; | ||
|
|
||
| //- Update sources array. | ||
| //- For each source, check if the file type exists. bool true if exists | ||
| - for (i in sources) { | ||
| - var suffix = sources[i][0]; | ||
| - sources[i][1] = fs.existsSync(absolute_nosuffix+"."+suffix); | ||
| - }; | ||
|
|
||
| //- Add all sources with valid file path (all sources that exist). | ||
| - var filtered_sources = sources.filter(function(e,i,a){ | ||
| - return e[1] === true; | ||
| - }); | ||
|
|
||
| //- filtered_sources = [] if no valid source | ||
| - var no_sources, preferred_src_suffix; | ||
| //- overwrite filtered_sources with new array with jpg only | ||
| - if (filtered_sources.length > 0) { | ||
| - no_sources = filtered_sources.every(function(e,i,a){ | ||
| - return !e[1]; | ||
| - }); | ||
| - preferred_src_suffix = filtered_sources[0][0]; | ||
| - } else { | ||
| - console.log("no valid source ! "+src); | ||
| - no_sources = true; | ||
| - preferred_src_suffix = 'jpg'; | ||
| - } | ||
|
|
||
| //- This is a workaround and not a long term solution. | ||
| //- This assumes that if there is no function argument specified for picture_style, | ||
| //- then we assume that it is not a blog post then calculate img ratio from image dimensions instead | ||
| - if (!picture_style && !no_sources){ | ||
| - var img_size = imageSize("./contents" + src ); | ||
| - var width = img_size.width; | ||
| - var height = img_size.height; | ||
| - } | ||
|
|
||
| - picture_style = !picture_style ? "" : picture_style; | ||
| - img_style = !img_style ? "" : img_style; | ||
| - var ratio = picture_style.length > 0 ? picture_style : "padding-bottom: " + (height/width)*100 + "%;" ; | ||
| - var img_style = img_style.length > 0 ? img_style : ""; | ||
| - var placeholder_img = no_sources | ||
|
|
||
| //- If there is no source img found then a placeholder img link is supplied as the path instead | ||
| - if (no_sources){ | ||
| - filtered_sources = [['jpg', true]]; | ||
| - path_nosuffix = 'http://via.placeholder.com/400'; | ||
| - ratio = "padding-bottom: 100%;"; | ||
| - img_style = "width:initial;height:initial"; | ||
| - } | ||
|
|
||
| picture(style=ratio).ratio-box.lazy-img | ||
| for i in filtered_sources | ||
| - suffix = i[0] | ||
| source(srcset="#{path_nosuffix}.#{suffix}" type="image/#{suffix}") | ||
|
|
||
| //- add src path and use suffix for images that exists | ||
| img(src="#{path_nosuffix}.#{preferred_src_suffix}" style=img_style).img-small--webp.lazyload | ||
| img(data-src="#{path_nosuffix}.#{preferred_src_suffix}" style=img_style title="#{title}" alt="#{alt}").img-large--webp.lazyload |
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