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Breaking node at beginning/end
[fnpeditor.git] / modules / documentCanvas / canvas / documentElement.js
diff --git a/modules/documentCanvas/canvas/documentElement.js b/modules/documentCanvas/canvas/documentElement.js
index 3f6a208..0309136 100644 (file)
--- a/modules/documentCanvas/canvas/documentElement.js
+++ b/modules/documentCanvas/canvas/documentElement.js
@@ -1,90 +1,352 @@
 define([
 define([
-'libs/jquery-1.9.1.min'
-], function($) {
+'libs/jquery-1.9.1.min',
+'libs/underscore-min'
+], function($, _) {
     
 'use strict';
 
     
 'use strict';
 
-// DocumentElement represents a node from WLXML document rendered inside Canvas
-var DocumentElement = function(htmlElement) {
+
+// DocumentElement represents a text or an element node from WLXML document rendered inside Canvas
+var DocumentElement = function(htmlElement, canvas) {
     if(arguments.length === 0)
         return;
     if(arguments.length === 0)
         return;
-    this.$element = $(htmlElement);
-    this.wlxmlTag = this.$element.prop('tagName');
+    this.canvas = canvas;
+    this._setupDOMHandler(htmlElement);
+}
+
+var elementTypeFromParams = function(params) {
+    return params.text !== undefined ? DocumentTextElement : DocumentNodeElement;
+
 };
 
 };
 
+$.extend(DocumentElement, {
+    create: function(params, canvas) {
+        return elementTypeFromParams(params).create(params);
+    },
+
+    createDOM: function(params) {
+        return elementTypeFromParams(params).createDOM(params);
+    },
+
+    fromHTMLElement: function(htmlElement, canvas) {
+        var $element = $(htmlElement);
+        if(htmlElement.nodeType === Node.ELEMENT_NODE && $element.attr('wlxml-tag'))
+            return DocumentNodeElement.fromHTMLElement(htmlElement, canvas);
+        if($element.attr('wlxml-text') !== undefined || (htmlElement.nodeType === Node.TEXT_NODE && $element.parent().attr('wlxml-text') !== undefined))
+            return DocumentTextElement.fromHTMLElement(htmlElement, canvas);
+        return undefined;
+    }
+});
+
 $.extend(DocumentElement.prototype, {
 $.extend(DocumentElement.prototype, {
+    _setupDOMHandler: function(htmlElement) {
+        this.$element = $(htmlElement);
+    },
+    dom: function() {
+        return this.$element;
+    },
+    parent: function() {
+        var parents = this.$element.parents('[wlxml-tag]');
+        if(parents.length)
+            return DocumentElement.fromHTMLElement(parents[0], this.canvas);
+        return null;
+    },
+
+    parents: function() {
+        var parents = [],
+            parent = this.parent();
+        while(parent) {
+            parents.push(parent);
+            parent = parent.parent();
+        }
+        return parents;
+    },
+
+    sameNode: function(other) {
+        return other && (typeof other === typeof this) && other.dom()[0] === this.dom()[0];
+    },
+
+    wrapWithNodeElement: function(wlxmlNode) {
+        var wrapper = DocumentNodeElement.create({tag: wlxmlNode.tag, klass: wlxmlNode.klass});
+        this.dom().replaceWith(wrapper.dom());
+        wrapper.append(this);
+        return wrapper;
+    },
+
+    detach: function() {
+        this.dom().detach();
+        this.canvas = null;
+    },
+
+    markAsCurrent: function() {
+        this.canvas.markAsCurrent(this);
+    },
+
+    getVerticallyFirstTextElement: function() {
+        var toret;
+        this.children().some(function(child) {
+            if(!child.isVisible())
+                return false; // continue
+            if(child instanceof DocumentTextElement) {
+                toret = child;
+                return true; // break
+            } else {
+                toret = child.getVerticallyFirstTextElement();
+                if(toret)
+                    return true; // break
+            }
+        });
+        return toret;
+    },
+
+    isVisible: function() {
+        return this instanceof DocumentTextElement || this.getWlxmlTag() !== 'metadata';
+    }
+});
+
+
+// DocumentNodeElement represents an element node from WLXML document rendered inside Canvas
+var DocumentNodeElement = function(htmlElement, canvas) {
+    DocumentElement.call(this, htmlElement, canvas);
+};
+
+$.extend(DocumentNodeElement, {
+    createDOM: function(params) {
+        var dom = $('<div>')
+            .attr('wlxml-tag', params.tag);
+        if(params.klass)
+            dom.attr('wlxml-class', params.klass.replace(/\./g, '-'));
+        return dom;
+    },
+
+    create: function(params, canvas) {
+        return this.fromHTMLElement(this.createDOM(params)[0]);
+    },
+
+    fromHTMLElement: function(htmlElement, canvas) {
+        return new this(htmlElement, canvas);
+    }
+});
+
+var manipulate = function(e, params, action) {
+    var element;
+    if(params instanceof DocumentElement) {
+        element = params;
+    } else {
+        element = DocumentElement.create(params);
+    }
+    e.dom()[action](element.dom());
+    return element;
+};
+
+DocumentNodeElement.prototype = new DocumentElement();
+
+$.extend(DocumentNodeElement.prototype, {
+    append: function(params) {
+        return manipulate(this, params, 'append');
+    },
+    before: function(params) {
+        return manipulate(this, params, 'before');
+
+    },
+    after: function(params) {
+        return manipulate(this, params, 'after');
+    },
     children: function() {
         var toret = [];
         if(this instanceof DocumentTextElement)
             return toret;
 
 
     children: function() {
         var toret = [];
         if(this instanceof DocumentTextElement)
             return toret;
 
 
-        var elementContent = this.$element.contents();
+        var elementContent = this.dom().contents();
+        var element = this;
         elementContent.each(function(idx) {
         elementContent.each(function(idx) {
-            var element = documentElementFromHTMLElement(this);
-            if(idx === 0 && elementContent.length > 1 && elementContent[1].nodeType === Node.ELEMENT_NODE && (element instanceof DocumentTextElement) && $.trim($(this).text()) === '')
+            var childElement = DocumentElement.fromHTMLElement(this, element.canvas);
+            if(idx === 0 && elementContent.length > 1 && elementContent[1].nodeType === Node.ELEMENT_NODE && (childElement instanceof DocumentTextElement) && $.trim($(this).text()) === '')
                 return true;
                 return true;
-            if(idx > 0 && element instanceof DocumentTextElement) {
+            if(idx > 0 && childElement instanceof DocumentTextElement) {
                 if(toret[toret.length-1] instanceof DocumentNodeElement && $.trim($(this).text()) === '')
                     return true;
             }
                 if(toret[toret.length-1] instanceof DocumentNodeElement && $.trim($(this).text()) === '')
                     return true;
             }
-            toret.push(element);
+            toret.push(childElement);
         });
         return toret;
     },
         });
         return toret;
     },
-    parent: function() {
-        return documentElementFromHTMLElement(this.$element.parent()[0]);
+    childIndex: function(child) {
+        var children = this.children(),
+            toret = null;
+        children.forEach(function(c, idx) {
+            if(c.sameNode(child)) {
+                toret = idx;
+                return false;
+            }
+        });
+        return toret;
     },
     },
-
-    sameNode: function(other) {
-        return other && (typeof other === typeof this) && other.$element[0] === this.$element[0];
+    getWlxmlTag: function() {
+        return this.dom().attr('wlxml-tag');
     },
     },
-
-    wrapWithNodeElement: function(wlxmlNode) {
-        this.$element.wrap($('<' + wlxmlNode.tag + ' class="' + wlxmlNode.klass + '"">')[0]);
-        return documentElementFromHTMLElement(this.$element.parent().get(0));
+    setWlxmlTag: function(tag) {
+        this.dom().attr('wlxml-tag', tag);
+    },
+    getWlxmlClass: function() {
+        var klass = this.dom().attr('wlxml-class');
+        if(klass)
+            return klass.replace('-', '.');
+        return undefined;
+    },
+    setWlxmlClass: function(klass) {
+        if(klass)
+            this.dom().attr('wlxml-class', klass);
+        else
+            this.dom().removeAttr('wlxml-class');
+    },
+    is: function(what) {
+        if(what === 'list' && _.contains(['list-items', 'list-items-enum'], this.dom().attr('wlxml-class')))
+            return true;
+        return false;
     }
 });
 
     }
 });
 
-var DocumentNodeElement = function(htmlElement) {
-    DocumentElement.call(this, htmlElement);
-};
 
 
-var DocumentTextElement = function(htmlElement) {
-    DocumentElement.call(this, htmlElement);  
+// DocumentNodeElement represents a text node from WLXML document rendered inside Canvas
+var DocumentTextElement = function(htmlElement, canvas) {
+    DocumentElement.call(this, htmlElement, canvas);
 };
 
 };
 
-DocumentNodeElement.prototype = new DocumentElement();
+$.extend(DocumentTextElement, {
+    createDOM: function(params) {
+        return $('<div>')
+            .attr('wlxml-text', '')
+            .text(params.text);
+    },
+
+    create: function(params, canvas) {
+        return this.fromHTMLElement(this.createDOM(params)[0]);
+    },
+
+    fromHTMLElement: function(htmlElement, canvas) {
+        return new this(htmlElement, canvas);
+    }
+});
+
 DocumentTextElement.prototype = new DocumentElement();
 
 DocumentTextElement.prototype = new DocumentElement();
 
-$.extend(DocumentNodeElement.prototype, {
-    append: function(params) {
-        var to_append = $('<' + params.tag + '>');
-        if(params.klass)
-            to_append.attr('class', params.klass);
-        this.$element.append(to_append);
-        return documentElementFromHTMLElement(to_append);
+$.extend(DocumentTextElement.prototype, {
+    _setupDOMHandler: function(htmlElement) {
+        var $element = $(htmlElement);
+        if(htmlElement.nodeType === Node.TEXT_NODE)
+            this.$element = $element.parent();
+        else
+            this.$element = $element;
+    },
+    setText: function(text) {
+        this.dom().contents()[0].data = text;
+    },
+    getText: function() {
+        return this.dom().text();
     },
     after: function(params) {
     },
     after: function(params) {
-        var to_append = $('<' + params.tag + '>');
-        if(params.klass)
-            to_append.attr('class', params.klass);
-        this.$element.after(to_append);
-        return documentElementFromHTMLElement(to_append);   
-    }
-})
+        if(params instanceof DocumentTextElement || params.text)
+            return false;
+        var element;
+        if(params instanceof DocumentNodeElement) {
+            element = params;
+        } else {
+            element = DocumentNodeElement.create(params);
+        }
+        this.dom().wrap('<div>');
+        this.dom().parent().after(element.dom());
+        this.dom().unwrap();
+        return element;
+    },
+    before: function(params) {
+        if(params instanceof DocumentTextElement || params.text)
+            return false;
+        var element;
+        if(params instanceof DocumentNodeElement) {
+            element = params;
+        } else {
+            element = DocumentNodeElement.create(params);
+        }
+        this.dom().wrap('<div>');
+        this.dom().parent().before(element.dom());
+        this.dom().unwrap();
+        return element;
+    },
+    wrapWithNodeElement: function(wlxmlNode) {
+        if(typeof wlxmlNode.start === 'number' && typeof wlxmlNode.end === 'number') {
+            return this.canvas.wrapText({
+                inside: this.parent(),
+                textNodeIdx: this.parent().childIndex(this),
+                offsetStart: Math.min(wlxmlNode.start, wlxmlNode.end),
+                offsetEnd: Math.max(wlxmlNode.start, wlxmlNode.end),
+                _with: {tag: wlxmlNode.tag, klass: wlxmlNode.klass}
+            });
+        } else {
+            return DocumentElement.prototype.wrapWithNodeElement.call(this, wlxmlNode);
+        }
+    },
+    unwrap: function() {
+        var parent = this.parent();
+        if(parent.children().length === 1) {
+            var grandParent = parent.parent();
+            if(grandParent) {
+                var grandParentChildren = grandParent.children(),
+                    idx = grandParent.childIndex(parent),
+                    prev = idx - 1 > -1 ? grandParentChildren[idx-1] : null,
+                    next = idx + 1 < grandParentChildren.length ? grandParentChildren[idx+1] : null;
+                if(prev && next) {
+                    prev.setText(prev.getText() + this.getText() + next.getText());
+                    next.detach();
+                } else if (prev || next) {
+                    var target = prev ? prev : next;
+                    target.setText(target.getText() + this.getText());
+                } else {
+                    parent.after(this);
+                }
+            } else {
+                parent.after(this);
+            }
+            parent.detach();
+        }
+    },
+    split: function(params) {
+        var parentElement = this.parent(),
+            myIdx = parentElement.childIndex(this),
+            myCanvas = this.canvas,
+            passed = false,
+            succeedingChildren = [],
+            thisElement = this,
+            prefix = this.getText().substr(0, params.offset),
+            suffix = this.getText().substr(params.offset);
 
 
-var documentElementFromHTMLElement = function(htmlElement) {
-    if(htmlElement.nodeType === Node.ELEMENT_NODE)
-        return new DocumentNodeElement(htmlElement);
-    if(htmlElement.nodeType === Node.TEXT_NODE)
-        return new DocumentTextElement(htmlElement);
-}
+        parentElement.children().forEach(function(child) {
+            if(passed)
+                succeedingChildren.push(child);
+            if(child.sameNode(thisElement))
+                passed = true;
+        });
 
 
-return {
-    wrap: function(htmlElement) {
-        return documentElementFromHTMLElement(htmlElement);
+        if(prefix.length > 0)
+            this.setText(prefix);
+        else
+            this.detach();
+        
+        var newElement = DocumentNodeElement.create({tag: parentElement.getWlxmlTag(), klass: parentElement.getWlxmlClass()}, myCanvas);
+        parentElement.after(newElement);
+
+        if(suffix.length > 0)
+            newElement.append({text: suffix});
+        succeedingChildren.forEach(function(child) {
+            newElement.append(child);
+        });
+
+        return {first: parentElement, second: newElement};
     },
     },
+});
+
+return {
     DocumentElement: DocumentElement,
     DocumentNodeElement: DocumentNodeElement,
     DocumentTextElement: DocumentTextElement
     DocumentElement: DocumentElement,
     DocumentNodeElement: DocumentNodeElement,
     DocumentTextElement: DocumentTextElement