Sindbad~EG File Manager
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* @module moodle-editor_atto-editor
* @submodule selection
*/
/**
* Selection functions for the Atto editor.
*
* See {{#crossLink "M.editor_atto.Editor"}}{{/crossLink}} for details.
*
* @namespace M.editor_atto
* @class EditorSelection
*/
function EditorSelection() {}
EditorSelection.ATTRS = {
};
EditorSelection.prototype = {
/**
* List of saved selections per editor instance.
*
* @property _selections
* @private
*/
_selections: null,
/**
* A unique identifier for the last selection recorded.
*
* @property _lastSelection
* @param lastselection
* @type string
* @private
*/
_lastSelection: null,
/**
* Whether focus came from a click event.
*
* This is used to determine whether to restore the selection or not.
*
* @property _focusFromClick
* @type Boolean
* @default false
* @private
*/
_focusFromClick: false,
/**
* Whether if the last gesturemovestart event target was contained in this editor or not.
*
* @property _gesturestartededitor
* @type Boolean
* @default false
* @private
*/
_gesturestartededitor: false,
/**
* Set up the watchers for selection save and restoration.
*
* @method setupSelectionWatchers
* @chainable
*/
setupSelectionWatchers: function() {
// Save the selection when a change was made.
this.on('atto:selectionchanged', this.saveSelection, this);
this.editor.on('focus', this.restoreSelection, this);
// Do not restore selection when focus is from a click event.
this.editor.on('mousedown', function() {
this._focusFromClick = true;
}, this);
// Copy the current value back to the textarea when focus leaves us and save the current selection.
this.editor.on('blur', function() {
// Clear the _focusFromClick value.
this._focusFromClick = false;
// Update the original text area.
this.updateOriginal();
}, this);
this.editor.on(['keyup', 'focus'], function(e) {
Y.soon(Y.bind(this._hasSelectionChanged, this, e));
}, this);
Y.one(document.body).on('gesturemovestart', function(e) {
if (this._wrapper.contains(e.target._node)) {
this._gesturestartededitor = true;
} else {
this._gesturestartededitor = false;
}
}, null, this);
Y.one(document.body).on('gesturemoveend', function(e) {
if (!this._gesturestartededitor) {
// Ignore the event if movestart target was not contained in the editor.
return;
}
Y.soon(Y.bind(this._hasSelectionChanged, this, e));
}, {
// Standalone will make sure all editors receive the end event.
standAlone: true
}, this);
return this;
},
/**
* Work out if the cursor is in the editable area for this editor instance.
*
* @method isActive
* @return {boolean}
*/
isActive: function() {
var range = rangy.createRange(),
selection = rangy.getSelection();
if (!selection.rangeCount) {
// If there was no range count, then there is no selection.
return false;
}
// We can't be active if the editor doesn't have focus at the moment.
if (!document.activeElement ||
!(this.editor.compareTo(document.activeElement) || this.editor.contains(document.activeElement))) {
return false;
}
// Check whether the range intersects the editor selection.
range.selectNode(this.editor.getDOMNode());
return range.intersectsRange(selection.getRangeAt(0));
},
/**
* Create a cross browser selection object that represents a YUI node.
*
* @method getSelectionFromNode
* @param {Node} YUI Node to base the selection upon.
* @return {[rangy.Range]}
*/
getSelectionFromNode: function(node) {
var range = rangy.createRange();
range.selectNode(node.getDOMNode());
return [range];
},
/**
* Save the current selection to an internal property.
*
* This allows more reliable return focus, helping improve keyboard navigation.
*
* Should be used in combination with {{#crossLink "M.editor_atto.EditorSelection/restoreSelection"}}{{/crossLink}}.
*
* @method saveSelection
*/
saveSelection: function() {
if (this.isActive()) {
this._selections = this.getSelection();
}
},
/**
* Restore any stored selection when the editor gets focus again.
*
* Should be used in combination with {{#crossLink "M.editor_atto.EditorSelection/saveSelection"}}{{/crossLink}}.
*
* @method restoreSelection
*/
restoreSelection: function() {
if (!this._focusFromClick) {
if (this._selections) {
this.setSelection(this._selections);
}
}
this._focusFromClick = false;
},
/**
* Get the selection object that can be passed back to setSelection.
*
* @method getSelection
* @return {array} An array of rangy ranges.
*/
getSelection: function() {
return rangy.getSelection().getAllRanges();
},
/**
* Check that a YUI node it at least partly contained by the current selection.
*
* @method selectionContainsNode
* @param {Node} The node to check.
* @return {boolean}
*/
selectionContainsNode: function(node) {
return rangy.getSelection().containsNode(node.getDOMNode(), true);
},
/**
* Runs a filter on each node in the selection, and report whether the
* supplied selector(s) were found in the supplied Nodes.
*
* By default, all specified nodes must match the selection, but this
* can be controlled with the requireall property.
*
* @method selectionFilterMatches
* @param {String} selector
* @param {NodeList} [selectednodes] For performance this should be passed. If not passed, this will be looked up each time.
* @param {Boolean} [requireall=true] Used to specify that "any" match is good enough.
* @return {Boolean}
*/
selectionFilterMatches: function(selector, selectednodes, requireall) {
if (typeof requireall === 'undefined') {
requireall = true;
}
if (!selectednodes) {
// Find this because it was not passed as a param.
selectednodes = this.getSelectedNodes();
}
var allmatch = selectednodes.size() > 0,
anymatch = false;
var editor = this.editor,
stopFn = function(node) {
// The function getSelectedNodes only returns nodes within the editor, so this test is safe.
return node === editor;
};
// If we do not find at least one match in the editor, no point trying to find them in the selection.
if (!editor.one(selector)) {
return false;
}
selectednodes.each(function(node) {
// Check each node, if it doesn't match the tags AND is not within the specified tags then fail this thing.
if (requireall) {
// Check for at least one failure.
if (!allmatch || !node.ancestor(selector, true, stopFn)) {
allmatch = false;
}
} else {
// Check for at least one match.
if (!anymatch && node.ancestor(selector, true, stopFn)) {
anymatch = true;
}
}
}, this);
if (requireall) {
return allmatch;
} else {
return anymatch;
}
},
/**
* Get the deepest possible list of nodes in the current selection.
*
* @method getSelectedNodes
* @return {NodeList}
*/
getSelectedNodes: function() {
var results = new Y.NodeList(),
nodes,
selection,
range,
node,
i;
selection = rangy.getSelection();
if (selection.rangeCount) {
range = selection.getRangeAt(0);
} else {
// Empty range.
range = rangy.createRange();
}
if (range.collapsed) {
// We do not want to select all the nodes in the editor if we managed to
// have a collapsed selection directly in the editor.
// It's also possible for the commonAncestorContainer to be the document, which selectNode does not handle
// so we must filter that out here too.
if (range.commonAncestorContainer !== this.editor.getDOMNode()
&& range.commonAncestorContainer !== Y.config.doc) {
range = range.cloneRange();
range.selectNode(range.commonAncestorContainer);
}
}
nodes = range.getNodes();
for (i = 0; i < nodes.length; i++) {
node = Y.one(nodes[i]);
if (this.editor.contains(node)) {
results.push(node);
}
}
return results;
},
/**
* Check whether the current selection has changed since this method was last called.
*
* If the selection has changed, the atto:selectionchanged event is also fired.
*
* @method _hasSelectionChanged
* @private
* @param {EventFacade} e
* @return {Boolean}
*/
_hasSelectionChanged: function(e) {
var selection = rangy.getSelection(),
range,
changed = false;
if (selection.rangeCount) {
range = selection.getRangeAt(0);
} else {
// Empty range.
range = rangy.createRange();
}
if (this._lastSelection) {
if (!this._lastSelection.equals(range)) {
changed = true;
return this._fireSelectionChanged(e);
}
}
this._lastSelection = range;
return changed;
},
/**
* Fires the atto:selectionchanged event.
*
* When the selectionchanged event is fired, the following arguments are provided:
* - event : the original event that lead to this event being fired.
* - selectednodes : an array containing nodes that are entirely selected of contain partially selected content.
*
* @method _fireSelectionChanged
* @private
* @param {EventFacade} e
*/
_fireSelectionChanged: function(e) {
this.fire('atto:selectionchanged', {
event: e,
selectedNodes: this.getSelectedNodes()
});
},
/**
* Get the DOM node representing the common anscestor of the selection nodes.
*
* @method getSelectionParentNode
* @return {Element|boolean} The DOM Node for this parent, or false if no seletion was made.
*/
getSelectionParentNode: function() {
var selection = rangy.getSelection();
if (selection.rangeCount) {
return selection.getRangeAt(0).commonAncestorContainer;
}
return false;
},
/**
* Set the current selection. Used to restore a selection.
*
* @method selection
* @param {array} ranges A list of rangy.range objects in the selection.
*/
setSelection: function(ranges) {
var selection = rangy.getSelection();
selection.setRanges(ranges);
},
/**
* Inserts the given HTML into the editable content at the currently focused point.
*
* @method insertContentAtFocusPoint
* @param {String} html
* @return {Node} The YUI Node object added to the DOM.
*/
insertContentAtFocusPoint: function(html) {
var selection = rangy.getSelection(),
range,
node = Y.Node.create(html);
if (selection.rangeCount) {
range = selection.getRangeAt(0);
}
if (range) {
range.deleteContents();
range.collapse(false);
var currentnode = node.getDOMNode(),
last = currentnode.lastChild || currentnode;
range.insertNode(currentnode);
range.collapseAfter(last);
selection.setSingleRange(range);
}
return node;
}
};
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Sindbad File Manager Version 1.0, Coded By Sindbad EG ~ The Terrorists