74 lines
2.1 KiB
JavaScript
74 lines
2.1 KiB
JavaScript
EPUBJS.Hooks.register("beforeChapterDisplay").smartimages = function(callback, renderer){
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var images = renderer.contents.querySelectorAll('img'),
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items = Array.prototype.slice.call(images),
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iheight = renderer.height,//chapter.bodyEl.clientHeight,//chapter.doc.body.getBoundingClientRect().height,
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oheight;
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if(renderer.layoutSettings.layout != "reflowable") {
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callback();
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return; //-- Only adjust images for reflowable text
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}
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items.forEach(function(item){
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var size = function() {
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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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fontSize = Number(getComputedStyle(item, "").fontSize.match(/(\d*(\.\d*)?)px/)[1]),
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fontAdjust = fontSize ? fontSize / 2 : 0;
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iheight = renderer.contents.clientHeight;
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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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// Remove top and half font-size from height to keep container from overflowing
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newHeight = iheight - top - fontAdjust;
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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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if(height > iheight) {
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item.style.maxHeight = iheight + "px";
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item.style.width= "auto";
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itemRect = item.getBoundingClientRect();
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height = itemRect.height;
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}
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item.style.display = "block";
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item.style["WebkitColumnBreakBefore"] = "always";
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item.style["breakBefore"] = "column";
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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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var unloaded = function(){
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// item.removeEventListener('load', size); // crashes in IE
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renderer.off("renderer:resized", size);
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renderer.off("renderer:chapterUnload", this);
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};
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item.addEventListener('load', size, false);
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renderer.on("renderer:resized", size);
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renderer.on("renderer:chapterUnload", unloaded);
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size();
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});
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if(callback) callback();
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}
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