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Define Project#isEmpty()

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This commit is contained in:
Jürg Lehni 2013-11-24 22:53:41 +01:00
parent ea62b570f3
commit da9e1f8de7
3 changed files with 14 additions and 2 deletions
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2
src/core/PaperScopeItem.js
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@ -38,7 +38,7 @@ var PaperScopeItem = Base.extend(Callback, /** @lends PaperScopeItem# */{
if (!this._scope)
return false;
var prev = this._scope[this._reference];
if (prev && prev != this)
if (prev && prev !== this)
prev.fire('deactivate');
this._scope[this._reference] = this;
this.fire('activate', prev);

2
src/item/Item.js
View file

@ -830,7 +830,7 @@ var Item = Base.extend(Callback, /** @lends Item# */{
* no children, a {@link TextItem} with no text content and a {@link Path}
* with no segments all are considered empty.
*
* @type Boolean
* @return Boolean
*/
isEmpty: function() {
return !this._children || this._children.length == 0;

12
src/project/Project.js
View file

@ -92,6 +92,18 @@ var Project = PaperScopeItem.extend(/** @lends Project# */{
this.symbols = [];
},
/**
* Specifies whether the project has any content or not. Note that since
* projects by default are created with one empty layer, this returns alos
* {@code true} if that layer exists but is itself empty.
*
* @return Boolean
*/
isEmpty: function() {
return this.layers.length <= 1
&& (!this.activeLayer || this.activeLayer.isEmpty());
},
/**
* Removes this project from the {@link PaperScope#projects} list, and also
* removes its view, if one was defined.