minimal support for txt documents

static/js/TXTViewer.js

@@ -0,0 +1,100 @@
+'use strict';
+
+/*@
+Ox.TXTViewer <f> TXT Viewer
+    options <o> Options
+        center <[n]|s|'auto'> Center ([x, y] or 'auto')
+        height <n|384> Viewer height in px
+        maxZoom <n|16> Maximum zoom (minimum zoom is 'fit')
+        txtjsURL <s|'/static/txt.js/'> URL to txt.js
+        url <s|''> TXT URL
+        width <n|512> Viewer width in px
+        zoom <n|s|'fit'> Zoom (number or 'fit' or 'fill')
+    self <o> Shared private variable
+    ([options[, self]]) -> <o:OxElement> TXT Viewer
+        center <!> Center changed
+            center <[n]|s> Center
+        zoom <!> Zoom changed
+            zoom <n|s> Zoom
+        page <!> Page changed
+            page <n|s> Page
+@*/
+Ox.TXTViewer = function(options, self) {
+
+    self = self || {};
+    var that = Ox.Element({}, self)
+        .defaults({
+            center: 'auto',
+            height: 384,
+            page: 1,
+            maxZoom: 16,
+            url: '',
+            width: 512,
+            zoom: 'fit'
+        })
+        .options(options || {})
+        .update({
+            center: function() {
+                setCenterAndZoom();
+            },
+            page: updatePage,
+            // allow for setting height and width at the same time
+            height: updateSize,
+            url: function() {
+                self.$iframe.postMessage('txt', {txt: self.options.url});
+            },
+            width: updateSize,
+            zoom: function() {
+                setCenterAndZoom();
+            }
+        })
+        .addClass('OxTXTViewer')
+        .on({
+        })
+        .bindEvent({
+        });
+
+    self.$iframe = Ox.Element('<iframe>')
+            .attr({
+                frameborder: 0,
+                height: self.options.height + 'px',
+                src: '/static/txt.js/?' + pandora.getVersion() + '&file=' + encodeURIComponent(self.options.url),
+                width: self.options.width + 'px'
+            })
+            .onMessage(function(data, event) {
+                that.triggerEvent(event, data);
+            })
+            .appendTo(that);
+
+    updateSize();
+
+    function setCenterAndZoom() {
+    }
+
+    function updatePage() {
+        self.$iframe.postMessage('page', {page: self.options.page});
+    }
+
+    function updateSize() {
+        that.css({
+            height: self.options.height + 'px',
+            width: self.options.width + 'px',
+        });
+        self.$iframe.css({
+            height: self.options.height + 'px',
+            width: self.options.width + 'px',
+        });
+    }
+
+    /*@
+    postMessage <f> postMessage
+        (event, data) -> <o>  post message to txt.js
+    @*/
+    that.postMessage = function(event, data) {
+        self.$iframe.postMessage(event, data);
+    }
+
+    return that;
+};
+
+