2 files changed, 171 insertions, 9 deletions
diff --git a/themes/smartpocket/js/smartpocket.js b/themes/smartpocket/js/smartpocket.js
index 8f0452672..fffb993fd 100644
--- a/themes/smartpocket/js/smartpocket.js
+++ b/themes/smartpocket/js/smartpocket.js
@@ -27,15 +27,7 @@ return '<div class="ps-toolbar-close"><div class="ps-toolbar-content"></div></di
 				}
 			}
 		});
-		$(window).bind('orientationchange', set_thumbnails_width);
-		set_thumbnails_width();
+		var spThumbs = new SPThumbs(SPThumbsOpts);
   });
 }(window, window.jQuery, window.Code.PhotoSwipe));
 
-function set_thumbnails_width() {
-	var dpr = 1 //window.devicePixelRatio>1 ? window.devicePixelRatio : 1
-		, nb_thumbs = Math.max(2, Math.ceil($('.thumbnails').width() / (var_thumb_width/dpr+2*5)))
-		, width = Math.floor(1000000 / nb_thumbs) / 10000;
-	$('.thumbnails li').css('width', width+'%');
-}
-
diff --git a/themes/smartpocket/js/thumb.arrange.js b/themes/smartpocket/js/thumb.arrange.js
new file mode 100644
index 000000000..f43c5d824
--- /dev/null
+++ b/themes/smartpocket/js/thumb.arrange.js
@@ -0,0 +1,170 @@
+
+function SPTLine(margin, rowHeight) {
+	this.elements = new Array;
+	this.margin = margin;
+	this.rowHeight = rowHeight;
+	this.maxHeight = 0;
+}
+
+SPTLine.prototype = {
+	width: 0,
+	elementsWidth: 0,
+	firstThumbIndex: 0,
+
+	add: function($elt, absIndex) {
+		if (this.elements.length === 0)
+			this.firstThumbIndex = absIndex;
+		if (!$elt.data("w"))
+		{
+			var w=$elt.width(), h=$elt.height();
+			if (h > this.rowHeight) {
+				w = Math.round(w * this.rowHeight/h);
+				h = this.rowHeight;
+			}
+			$elt.data("w", w)
+				.data("h", h);
+		}
+
+		var eltObj = {
+			$elt: $elt,
+			w: $elt.data("w"),
+			h: $elt.data("h")
+		};
+		this.elements.push(eltObj);
+
+		if (eltObj.h > this.maxHeight)
+			this.maxHeight = eltObj.h;
+
+		this.width += this.margin + eltObj.w;
+		this.elementsWidth += eltObj.w;
+	},
+
+	clear: function() {
+		if (!this.elements.length) return;
+		this.width = this.elementsWidth = 0;
+		this.maxHeight = 0;
+		this.elements.length = 0;
+	}
+}
+
+
+function SPThumbs(options) {
+	this.opts = options;
+
+	this.$thumbs = $('.thumbnails');
+	if (this.$thumbs.length==0) return;
+	this.$thumbs.css('text-align', 'left');
+
+	this.opts.extraRowHeight = 0;
+	if (window.devicePixelRatio > 1) {
+		var dpr = window.devicePixelRatio;
+		this.opts.extraRowHeight = 6; /*loose sharpness but only for small screens when we could "almost" fit with full sharpness*/
+		this.opts.rowHeight = Math.round(this.opts.rowHeight / dpr ) + this.opts.extraRowHeight;
+	}
+	this.process();
+
+	var that = this;
+	$(window).on('resize', function() {
+		if (Math.abs(that.$thumbs.width() - that.prevContainerWidth)>1)
+			that.process();
+	})
+		.on('RVTS_loaded', function(evt, down) {
+			that.process( down && that.$thumbs.width() == that.prevContainerWidth ? that.prevLastLineFirstThumbIndex : 0);
+		} );
+}
+
+SPThumbs.prototype = {
+	prevContainerWidth:0,
+	prevLastLineFirstThumbIndex: 0,
+
+	process: function(startIndex) {
+		startIndex = startIndex ? startIndex : 0;
+		var containerWidth  = this.$thumbs.width()
+			, maxExtraMarginPerThumb = 1;
+		this.prevContainerWidth = containerWidth;
+
+		var $elts = $('li.liVisible>a>img', this.$thumbs)
+			, line  = new SPTLine(this.opts.hMargin, this.opts.rowHeight);
+
+		for (var i=startIndex; i<$elts.length; i++) {
+			var $elt = $( $elts[i] );
+
+			line.add($elt, i);
+			if (line.width >= containerWidth - maxExtraMarginPerThumb * line.elements.length) {
+				this.processLine(line, containerWidth);
+				line.clear();
+			}
+		};
+
+		if(line.elements.length)
+			this.processLine(line, containerWidth, true);
+		this.prevLastLineFirstThumbIndex = line.firstThumbIndex;
+	},
+
+	processLine: function(line, containerWidth, lastLine) {
+		var toRecover, eltW, eltH
+			, rowHeight = line.maxHeight ? line.maxHeight : line.elements[0].h;
+
+		if (line.width / containerWidth > 1.01) {
+			var ratio = line.elementsWidth / (line.elementsWidth + containerWidth - line.width);
+			var adjustedRowHeight = rowHeight / (1 + (ratio-1) * 0.95 );
+			adjustedRowHeight = 6 * Math.round( adjustedRowHeight/6 );
+			if (adjustedRowHeight < rowHeight / ratio ) {
+				adjustedRowHeight = Math.ceil( rowHeight / ratio );
+				var missing = this.opts.rowHeight - this.opts.extraRowHeight - adjustedRowHeight;
+				if (missing>0 && missing<6)
+					adjustedRowHeight += missing;
+			}
+			if (adjustedRowHeight < rowHeight)
+				rowHeight = adjustedRowHeight;
+		}
+		else if (lastLine)
+			rowHeight = Math.min( rowHeight, this.opts.rowHeight - this.opts.extraRowHeight);
+
+		toRecover = line.width - containerWidth;
+		if (lastLine)
+			toRecover = 0;
+
+		for(var i=0; i<line.elements.length; i++) {
+			var eltObj = line.elements[i]
+				, eltW=eltObj.w
+				, eltH=eltObj.h
+				, eltToRecover;
+
+			if (i==line.elements.length-1)
+				eltToRecover = toRecover;
+			else
+				eltToRecover = Math.round(toRecover * eltW / line.elementsWidth);
+
+			toRecover -= eltToRecover;
+			line.elementsWidth -= eltW;
+
+			if (eltH > rowHeight ) {
+				eltW = Math.round( eltW * rowHeight/eltObj.h );
+				eltH = rowHeight;
+				eltToRecover -= eltObj.w - eltW;
+				if (lastLine)
+					eltToRecover = 0;
+			}
+
+			this.reposition(eltObj.$elt, eltW, eltH, eltW-eltToRecover, rowHeight);
+		}
+	},
+
+	reposition: function($img, imgW, imgH, liW, liH) {
+		$img.attr("width", imgW)
+			.attr("height", imgH);
+
+		$img.closest("li").css( {
+			width: liW+"px",
+			height: liH+"px"
+		});
+
+		$img.parent("a").css( {
+			left: Math.round((liW-imgW)/2)+"px",
+			top: Math.round((liH-imgH)/2)+"px"
+		});
+	}
+
+}
+