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56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
EPUBJS.Hooks.register("beforeChapterDisplay").smartimages = function(callback, chapter){
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var images = chapter.doc.querySelectorAll('img'),
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items = Array.prototype.slice.call(images),
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iheight = chapter.height(),//chapter.doc.body.getBoundingClientRect().height,
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oheight;
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items.forEach(function(item){
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function size() {
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var itemRect = item.getBoundingClientRect(),
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rectHeight = itemRect.height,
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top = itemRect.top,
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oHeight = item.getAttribute('data-height'),
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height = oHeight || rectHeight,
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newHeight;
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iheight = chapter.height();
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if(top < 0) top = 0;
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if(height + top >= iheight) {
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if(top < iheight/2) {
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newHeight = iheight - top;
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item.style.maxHeight = newHeight + "px";
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item.style.width= "auto";
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}else{
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height = (height < iheight ? height : iheight);
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item.style.maxHeight = newHeight + "px";
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item.style.marginTop = iheight - top + "px";
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item.style.width= "auto";
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}
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item.setAttribute('data-height', newHeight);
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}else{
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item.style.removeProperty('max-height');
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item.style.removeProperty('margin-top');
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}
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}
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item.addEventListener('load', size, false);
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chapter.on("book:resized", size);
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chapter.on("book:chapterDestroyed", function(){
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item.removeEventListener('load', size);
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chapter.off("book:resized", size);
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});
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size();
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});
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if(callback) callback();
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}
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