src/redakcja/static/js/wiki/view_gallery.js

   1 (function($){
   2
   3     function normalizeNumber(pageNumber, pageCount){
   4         // Page number should be >= 1, <= pageCount; 0 if pageCount = 0
   5         var pageNumber = parseInt(pageNumber, 10);
   6
   7         if (!pageCount)
   8             return 0;
   9
  10         if (!pageNumber ||
  11                 isNaN(pageNumber) ||
  12                 pageNumber == Infinity ||
  13                 pageNumber == -Infinity ||
  14                 pageNumber < 1)
  15             return 1;
  16
  17         if (pageNumber > pageCount)
  18             return pageCount;
  19
  20         return pageNumber;
  21     }
  22
  23     function bounds(galleryWidth, galleryHeight, imageWidth, imageHeight){
  24         return {
  25             maxX: 0,
  26             maxY: 0,
  27             minX: galleryWidth - imageWidth,
  28             minY: galleryHeight - imageHeight
  29         }
  30     };
  31
  32     function normalizePosition(x, y, galleryWidth, galleryHeight, imageWidth, imageHeight){
  33         var b = bounds(galleryWidth, galleryHeight, imageWidth, imageHeight);
  34         return {
  35             x: Math.min(b.maxX, Math.max(b.minX, x)),
  36             y: Math.min(b.maxY, Math.max(b.minY, y))
  37         }
  38     };
  39
  40     function fixImageSize(){
  41
  42     }
  43
  44     /*
  45      * Perspective
  46      */
  47     function ScanGalleryPerspective(options){
  48         var old_callback = options.callback || function() { };
  49
  50         this.vsplitbar = 'GALERIA';
  51
  52         options.callback = function(){
  53             var self = this;
  54
  55             this.dimensions = {};
  56             this.zoomFactor = 1;
  57             if (this.config().page == undefined)
  58                 this.config().page = CurrentDocument.galleryStart;
  59             this.$element = $("#side-gallery");
  60             this.$numberInput = $('.page-number', this.$element);
  61
  62             // ...
  63             var origin = {};
  64             var imageOrigin = {};
  65
  66             this.$image = $('.gallery-image img', this.$element).attr('unselectable', 'on');
  67
  68             // button handlers
  69             this.$numberInput.change(function(event){
  70                 event.preventDefault();
  71                 self.setPage($(this).val());
  72             });
  73
  74             $('.start-page', this.$element).click(function(){
  75                 self.setPage(CurrentDocument.galleryStart);
  76             });
  77
  78             $('.previous-page', this.$element).click(function(){
  79                 self.setPage(parseInt(self.$numberInput.val(),10) - 1);
  80             });
  81
  82             $('.next-page', this.$element).click(function(){
  83                 self.setPage(parseInt(self.$numberInput.val(),10) + 1);
  84             });
  85
  86             $('.zoom-in', this.$element).click(function(){
  87                 self.alterZoom(0.2);
  88             });
  89
  90             $('.zoom-out', this.$element).click(function(){
  91                 self.alterZoom((-0.2));
  92             });
  93
  94             $(window).resize(function(){
  95                 self.dimensions.galleryWidth = self.$image.parent().width();
  96                 self.dimensions.galleryHeight = self.$image.parent().height();
  97             });
  98
  99             this.$image.load(function(){
 100                 console.log("Image loaded.")
 101                 self._resizeImage();
 102             }).bind('mousedown', function() {
 103                                 self.imageMoveStart.apply(self, arguments);
 104                         });
 105
 106
 107
 108                         old_callback.call(this);
 109         };
 110
 111         $.wiki.SidebarPerspective.call(this, options);
 112     };
 113
 114     ScanGalleryPerspective.prototype = new $.wiki.SidebarPerspective();
 115
 116     ScanGalleryPerspective.prototype._resizeImage = function(){
 117         var $img = this.$image;
 118
 119         $img.css({
 120             width: '',
 121             height: ''
 122         });
 123
 124         this.dimensions = {
 125             width: $img.width() * this.zoomFactor,
 126             height: $img.height() * this.zoomFactor,
 127             originWidth: $img.width(),
 128             originHeight: $img.height(),
 129                     galleryWidth: $img.parent().width(),
 130             galleryHeight: $img.parent().height()
 131         };
 132
 133         if (!(this.dimensions.width && this.dimensions.height)) {
 134             setTimeout(function(){
 135                 $img.load();
 136             }, 100);
 137         }
 138
 139         var position = normalizePosition($img.position().left, $img.position().top, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 140
 141         $img.css({
 142             left: position.x,
 143             top: position.y,
 144             width: $img.width() * this.zoomFactor,
 145             height: $img.height() * this.zoomFactor
 146         });
 147     };
 148
 149     ScanGalleryPerspective.prototype.setPage = function(newPage){
 150         newPage = normalizeNumber(newPage, this.doc.galleryImages.length);
 151         this.$numberInput.val(newPage);
 152                 this.config().page = newPage;
 153         $('.gallery-image img', this.$element).attr('src', this.doc.galleryImages[newPage - 1].url);
 154     };
 155
 156     ScanGalleryPerspective.prototype.alterZoom = function(delta){
 157         var zoomFactor = this.zoomFactor + delta;
 158         if (zoomFactor < 0.2)
 159             zoomFactor = 0.2;
 160         if (zoomFactor > 2)
 161             zoomFactor = 2;
 162         this.setZoom(zoomFactor);
 163     };
 164
 165     ScanGalleryPerspective.prototype.setZoom = function(factor){
 166         this.zoomFactor = factor;
 167
 168         this.dimensions.width = this.dimensions.originWidth * this.zoomFactor;
 169         this.dimensions.height = this.dimensions.originHeight * this.zoomFactor;
 170
 171         // var position = normalizePosition(this.$image.position().left, this.$image.position().top, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 172
 173                 this._resizeImage();
 174     };
 175
 176         /*
 177          * Movement
 178          */
 179         ScanGalleryPerspective.prototype.imageMoved = function(event){
 180                 event.preventDefault();
 181
 182                 // origin is where the drag started
 183                 // imageOrigin is where the drag started on the image
 184
 185                 var newX = event.clientX - this.origin.x + this.imageOrigin.left;
 186                 var newY = event.clientY - this.origin.y + this.imageOrigin.top;
 187
 188                 var position = normalizePosition(newX, newY, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 189
 190                 this.$image.css({
 191                         left: position.x,
 192                         top: position.y,
 193                 });
 194
 195                 return false;
 196         };
 197
 198         ScanGalleryPerspective.prototype.imageMoveStart = function(event){
 199                 event.preventDefault();
 200
 201                 var self = this;
 202
 203                 this.origin = {
 204                         x: event.clientX,
 205                         y: event.clientY
 206                 };
 207
 208                 this.imageOrigin = self.$image.position();
 209                 $(document).bind('mousemove.gallery', function(){
 210                         self.imageMoved.apply(self, arguments);
 211                 }).bind('mouseup.gallery', function() {
 212                         self.imageMoveStop.apply(self, arguments);
 213                 });
 214
 215                 return false;
 216         };
 217
 218         ScanGalleryPerspective.prototype.imageMoveStop = function(event){
 219                 $(document).unbind('mousemove.gallery').unbind('mouseup.gallery');
 220         };
 221
 222     /*
 223      * Loading gallery
 224      */
 225     ScanGalleryPerspective.prototype.onEnter = function(success, failure){
 226         $.wiki.SidebarPerspective.prototype.onEnter.call(this);
 227
 228         var self = this;
 229
 230         this.doc.refreshGallery({
 231             success: function(doc, data){
 232                 self.$image.show();
 233                                 console.log("gconfig:", self.config().page );
 234                                 self.setPage( self.config().page );
 235                 $('#imagesCount').html("/" + doc.galleryImages.length);
 236
 237                 $('.error_message', self.$element).hide();
 238                 if(success) success();
 239             },
 240             failure: function(doc, message){
 241                 self.$image.hide();
 242                 $('.error_message', self.$element).show().html(message);
 243                 if(failure) failure();
 244             }
 245         });
 246
 247     };
 248
 249         ScanGalleryPerspective.prototype.onExit = function(success, failure) {
 250
 251         };
 252
 253     $.wiki.ScanGalleryPerspective = ScanGalleryPerspective;
 254
 255 })(jQuery);