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();
+
+}