diff options
Diffstat (limited to 'lib/smartimages.js')
-rw-r--r-- | lib/smartimages.js | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/lib/smartimages.js b/lib/smartimages.js new file mode 100644 index 0000000..8c1ec5f --- /dev/null +++ b/lib/smartimages.js @@ -0,0 +1,73 @@ +EPUBJS.Hooks.register("beforeChapterDisplay").smartimages = function(callback, renderer){ + var images = renderer.contents.querySelectorAll('img'), + items = Array.prototype.slice.call(images), + iheight = renderer.height,//chapter.bodyEl.clientHeight,//chapter.doc.body.getBoundingClientRect().height, + oheight; + + if(renderer.layoutSettings.layout != "reflowable") { + callback(); + return; //-- Only adjust images for reflowable text + } + + items.forEach(function(item){ + + var size = function() { + var itemRect = item.getBoundingClientRect(), + rectHeight = itemRect.height, + top = itemRect.top, + oHeight = item.getAttribute('data-height'), + height = oHeight || rectHeight, + newHeight, + fontSize = Number(getComputedStyle(item, "").fontSize.match(/(\d*(\.\d*)?)px/)[1]), + fontAdjust = fontSize ? fontSize / 2 : 0; + + iheight = renderer.contents.clientHeight; + if(top < 0) top = 0; + + if(height + top >= iheight) { + + if(top < iheight/2) { + // Remove top and half font-size from height to keep container from overflowing + newHeight = iheight - top - fontAdjust; + item.style.maxHeight = newHeight + "px"; + item.style.width= "auto"; + }else{ + if(height > iheight) { + item.style.maxHeight = iheight + "px"; + item.style.width= "auto"; + itemRect = item.getBoundingClientRect(); + height = itemRect.height; + } + item.style.display = "block"; + item.style["WebkitColumnBreakBefore"] = "always"; + item.style["breakBefore"] = "column"; + + } + + item.setAttribute('data-height', newHeight); + + }else{ + item.style.removeProperty('max-height'); + item.style.removeProperty('margin-top'); + } + } + + var unloaded = function(){ + // item.removeEventListener('load', size); // crashes in IE + renderer.off("renderer:resized", size); + renderer.off("renderer:chapterUnload", this); + }; + + item.addEventListener('load', size, false); + + renderer.on("renderer:resized", size); + + renderer.on("renderer:chapterUnload", unloaded); + + size(); + + }); + + if(callback) callback(); + +} |