editor: canvas - refactoring Canvas Selection

[fnpeditor.git] / src / editor / modules / documentCanvas / canvas / selection.js

diff --git a/src/editor/modules/documentCanvas/canvas/selection.js b/src/editor/modules/documentCanvas/canvas/selection.js
new file mode 100644 (file)
index 0000000..790f56d
--- /dev/null
+++ b/src/editor/modules/documentCanvas/canvas/selection.js
@@ -0,0 +1,115 @@
+define(function(require) {
+    
+'use strict';
+
+var $ = require('libs/jquery');
+
+var Selection = function(canvas, params) {
+    this.canvas = canvas;
+    $.extend(this, params);
+};
+
+var CaretSelection = function(canvas, params) {
+    Selection.call(this, canvas, params);
+};
+CaretSelection.prototype = Object.create(Selection.prototype);
+$.extend(CaretSelection.prototype, {
+    toDocumentFragment: function() {
+        var doc = this.canvas.wlxmlDocument;
+        return doc.createFragment(doc.CaretFragment, {node: this.element.wlxmlNode, offset: this.offset});
+    }
+});
+
+var TextSelection = function(canvas, params) {
+    Selection.call(this, canvas, params);
+};
+TextSelection.prototype = Object.create(Selection.prototype);
+$.extend(TextSelection.prototype, {
+    toDocumentFragment: function() {
+        var doc = this.canvas.wlxmlDocument,
+            anchorNode = this.anchorElement ? this.anchorElement.wlxmlNode : null,
+            focusNode = this.focusElement ? this.focusElement.wlxmlNode : null;
+        
+        if(!anchorNode || !focusNode) {
+            return;
+        }
+
+        if(anchorNode.isSiblingOf(focusNode)) {
+            return doc.createFragment(doc.TextRangeFragment, {
+                node1: anchorNode,
+                offset1: this.anchorOffset,
+                node2: focusNode,
+                offset2: this.focusOffset,
+            });
+        }
+        else {
+            var siblingParents = doc.getSiblingParents({node1: anchorNode, node2: focusNode});
+            return doc.createFragment(doc.RangeFragment, {
+                node1: siblingParents.node1,
+                node2: siblingParents.node2
+            });
+        }
+    }
+});
+
+var NodeSelection = function(canvas, params) {
+    Selection.call(this, canvas, params);
+};
+NodeSelection.prototype = Object.create(Selection.prototype);
+$.extend(NodeSelection.prototype, {
+    toDocumentFragment: function() {
+        var doc = this.canvas.wlxmlDocument;
+        doc.createFragment(doc.NodeFragment, {node: this.element.wlxmlNode});
+    }
+});
+
+
+var isText = function(node) {
+    /* globals Node */
+    return node && node.nodeType === Node.TEXT_NODE && $(node.parentNode).is('[document-text-element]');
+};
+
+var types = {
+    caret: CaretSelection,
+    textSelection: TextSelection,
+    nodeSelection: NodeSelection
+};
+
+return {
+    fromParams: function(canvas, params) {
+        return new types[params.type](canvas, params);
+    },
+    fromNativeSelection: function(canvas) {
+        /* globals window */
+        var nativeSelection =  window.getSelection(),
+            params = {},
+            element;
+        if(nativeSelection.focusNode) {
+            if(nativeSelection.isCollapsed && isText(nativeSelection.focusNode)) {
+                params = {
+                    type: 'caret',
+                    element: canvas.getDocumentElement(nativeSelection.focusNode),
+                    offset: nativeSelection.focusOffset
+                };
+            } else if(isText(nativeSelection.focusNode) && isText(nativeSelection.anchorNode)) {
+                params = {
+                    type: 'textSelection',
+                    anchorElement: canvas.getDocumentElement(nativeSelection.anchorNode),
+                    anchorOffset: nativeSelection.anchorOffset,
+                    focusElement: canvas.getDocumentElement(nativeSelection.focusNode),
+                    focusOffset: nativeSelection.focusOffset
+                };
+            }
+        } else if((element = canvas.getCurrentNodeElement())) {
+            params = {
+                type: 'nodeSelection',
+                element: element
+            };
+        }
+        if(params.type) {
+            return this.fromParams(canvas, params);
+        }
+    }
+};
+
+});
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