integration wip: restoring caret position and editor scroll after returning to editor tab

[fnpeditor.git] / modules / documentCanvas / canvas / canvas.js

diff --git a/modules/documentCanvas/canvas/canvas.js b/modules/documentCanvas/canvas/canvas.js
index 4344730..7a1d930 100644 (file)
--- a/modules/documentCanvas/canvas/canvas.js
+++ b/modules/documentCanvas/canvas/canvas.js
@@ -6,8 +6,9 @@ define([
     
 'use strict';
 
-var Canvas = function(wlxml) {
+var Canvas = function(wlxml, publisher) {
     this.loadWlxml(wlxml);
+    this.publisher = publisher ? publisher : function() {};
 };
 
 $.extend(Canvas.prototype, {
@@ -15,10 +16,10 @@ $.extend(Canvas.prototype, {
     loadWlxml: function(wlxml) {
         var d = wlxml ? $($.trim(wlxml)) : null;
         if(d) {
-            var wrapper = $('<div>');
-            wrapper.append(d);
+            this.wrapper = $('<div>').addClass('canvas-wrapper').attr('contenteditable', true);
+            this.wrapper.append(d);
             
-            wrapper.find('*').replaceWith(function() {
+            this.wrapper.find('*').replaceWith(function() {
                 var currentTag = $(this);
                 if(currentTag.attr('wlxml-tag'))
                     return;
@@ -31,7 +32,7 @@ $.extend(Canvas.prototype, {
                 return element;
             });
 
-            wrapper.find(':not(iframe)').addBack().contents()
+            this.wrapper.find(':not(iframe)').addBack().contents()
                 .filter(function() {return this.nodeType === Node.TEXT_NODE})
                 .each(function() {
 
@@ -61,18 +62,43 @@ $.extend(Canvas.prototype, {
                         }
                     }
 
-                    var wrapper = documentElement.DocumentTextElement.create({text: this.data});
-                    $(this).before(wrapper.dom());
-                    $(this).remove();
+                    var element = documentElement.DocumentTextElement.create({text: this.data});
+                    $(this).replaceWith(element.dom());
                 });
             
-            this.d = wrapper.children(0);
-            this.d.unwrap();
+            this.d = this.wrapper.children(0);
+
+            var canvas = this;
+            this.wrapper.on('keydown', function(e) {
+                if(e.which === 13) { 
+                    e.preventDefault();
+                    var cursor = canvas.getCursor();
+                    if(!cursor.isSelecting()) {
+                        var position = cursor.getPosition();
+                        position.element.split({offset: position.offset});
+                    }
+                }
+            });
+
+            this.wrapper.on('keyup', function(e) {
+                if(e.which >= 37 && e.which <= 40)
+                    canvas.setCurrentElement(canvas.getCursor().getPosition().element, {caretTo: false})
+            });
+
+            this.wrapper.on('click', '[wlxml-tag], [wlxml-text]', function(e) {
+                e.stopPropagation();
+                canvas.setCurrentElement(canvas.getDocumentElement(e.target), {caretTo: false});
+            });
+
         } else {
             this.d = null;
         }
     },
 
+    view: function() {
+        return this.wrapper;
+    },
+
     doc: function() {
         if(this.d === null)
             return null;
@@ -129,7 +155,100 @@ $.extend(Canvas.prototype, {
     },
 
     list: {},
+
+
+
+    highlightElement: function(element) {
+        this.wrapper.find('.highlighted-element').removeClass('highlighted-element');
+        element.dom().addClass('highlighted-element');
+    },
+
+    dimElement: function(element) {
+        element.dom().removeClass('highlighted-element');
+    },
     
+    getCurrentNodeElement: function() {
+        return this.getDocumentElement(this.wrapper.find('.current-node-element')[0]);
+    },
+
+    getCurrentTextElement: function() {
+        return this.getDocumentElement(this.wrapper.find('.current-text-element')[0]);
+    },
+
+
+
+    setCurrentElement: function(element, params) {
+        params = _.extend({caretTo: 'end'}, params);
+        var findFirstDirectTextChild = function(e) {
+            var children = e.children();
+            for(var i = 0; i < children.length; i++) {
+                if(children[i] instanceof documentElement.DocumentTextElement)
+                    return children[i];
+            }
+            return null;
+        };
+        var _markAsCurrent = function(element) {
+            if(element instanceof documentElement.DocumentTextElement) {
+                this.wrapper.find('.current-text-element').removeClass('current-text-element');
+                element.dom().addClass('current-text-element');
+            } else {
+                this.wrapper.find('.current-node-element').removeClass('current-node-element')
+                element.dom().addClass('current-node-element');
+                this.publisher('currentElementChanged', element);
+            }
+        }.bind(this);
+
+
+        var isTextElement = element instanceof documentElement.DocumentTextElement,
+            textElementToLand = isTextElement ? element : findFirstDirectTextChild(element),
+            nodeElementToLand = isTextElement ? element.parent() : element,
+            currentTextElement = this.getCurrentTextElement(),
+            currentNodeElement = this.getCurrentNodeElement();
+
+        if(currentTextElement && !(currentTextElement.sameNode(textElementToLand)))
+            this.wrapper.find('.current-text-element').removeClass('current-text-element');
+
+        if(textElementToLand && !(textElementToLand.sameNode(currentTextElement))) {
+            _markAsCurrent(textElementToLand);
+            if(params.caretTo)
+                this._moveCaretToTextElement(textElementToLand, params.caretTo); // as method on element?
+            this.publisher('currentTextElementSet', element);
+        }
+
+        if(!(currentNodeElement && currentNodeElement.sameNode(nodeElementToLand))) {
+            _markAsCurrent(nodeElementToLand);
+            if(!textElementToLand)
+                document.getSelection().removeAllRanges();
+            this.publisher('currentNodeElementSet', nodeElementToLand);
+        }
+    },
+
+    _moveCaretToTextElement: function(element, where) {
+        var range = document.createRange(),
+            node = element.dom().contents()[0];
+
+        if(typeof where !== 'number') {
+            range.selectNodeContents(node);
+        } else {
+            range.setStart(node, where);
+        }
+        
+        var collapseArg = true;
+        if(where === 'end')
+            collapseArg = false;
+        range.collapse(collapseArg);
+        
+        var selection = document.getSelection();
+
+        selection.removeAllRanges();
+        selection.addRange(range);
+        this.wrapper.focus(); // FF requires this for caret to be put where range colllapses, Chrome doesn't.
+    },
+
+    setCursorPosition: function(position) {
+        if(position.element)
+            this._moveCaretToTextElement(position.element, position.offset);
+    }
 });
 
 $.extend(Canvas.prototype.list, {
@@ -346,8 +465,8 @@ $.extend(Cursor.prototype, {
 })
 
 return {
-    fromXML: function(xml) {
-        return new Canvas(xml);
+    fromXML: function(xml, publisher) {
+        return new Canvas(xml, publisher);
     }
 };