ace/lib/ace/mouse_handler.js

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Ajax.org Code Editor (ACE).
 *
 * The Initial Developer of the Original Code is
 * Ajax.org B.V.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

define(function(require, exports, module) {

var event = require("pilot/event");

var MouseHandler = function(editor) {
    this.editor = editor;
    event.addListener(editor.container, "mousedown", function(e) {
        editor.focus();
        return event.preventDefault(e);
    });
    event.addListener(editor.container, "selectstart", function(e) {
        return event.preventDefault(e);
    });
    
    var mouseTarget = editor.renderer.getMouseEventTarget();
    event.addListener(mouseTarget, "mousedown", this.onMouseDown.bind(this));
    event.addMultiMouseDownListener(mouseTarget, 0, 2, 500, this.onMouseDoubleClick.bind(this));
    event.addMultiMouseDownListener(mouseTarget, 0, 3, 600, this.onMouseTripleClick.bind(this));
    event.addMouseWheelListener(mouseTarget, this.onMouseWheel.bind(this));
};

(function() {

    this.$scrollSpeed = 1;
    this.setScrollSpeed = function(speed) {
        this.$scrollSpeed = speed;
    };
    
    this.getScrollSpeed = function() {
        return this.$scrollSpeed;
    };
    
    this.onMouseDown = function(e) {
        var pageX = event.getDocumentX(e);
        var pageY = event.getDocumentY(e);
        var editor = this.editor;
    
        var pos = editor.renderer.screenToTextCoordinates(pageX, pageY);
        pos.row = Math.max(0, Math.min(pos.row, editor.session.getLength()-1));
    
        var button = event.getButton(e)
        if (button != 0) {
            var isEmpty = editor.selection.isEmpty()
            if (isEmpty) {
                editor.moveCursorToPosition(pos);
            }
            if(button == 2) {
                editor.textInput.onContextMenu({x: pageX, y: pageY}, isEmpty);
                event.capture(editor.container, function(){}, editor.textInput.onContextMenuClose);
            }
            return;
        }
    
        if (e.shiftKey)
            editor.selection.selectToPosition(pos)
        else {
            editor.moveCursorToPosition(pos);
            if (!editor.$clickSelection)
                editor.selection.clearSelection(pos.row, pos.column);
        }
    
        editor.renderer.scrollCursorIntoView();
    
        var self = this;
        var mousePageX, mousePageY;
    
        var onMouseSelection = function(e) {
            mousePageX = event.getDocumentX(e);
            mousePageY = event.getDocumentY(e);
        };
    
        var onMouseSelectionEnd = function() {
            clearInterval(timerId);
            self.$clickSelection = null;
        };
    
        var onSelectionInterval = function() {
            if (mousePageX === undefined || mousePageY === undefined)
                return;
    
            var cursor = editor.renderer.screenToTextCoordinates(mousePageX, mousePageY);
            cursor.row = Math.max(0, Math.min(cursor.row, editor.session.getLength()-1));
    
            if (self.$clickSelection) {
                if (self.$clickSelection.contains(cursor.row, cursor.column)) {
                    editor.selection.setSelectionRange(self.$clickSelection);
                } else {
                    if (self.$clickSelection.compare(cursor.row, cursor.column) == -1) {
                        var anchor = self.$clickSelection.end;
                    } else {
                        var anchor = self.$clickSelection.start;
                    }
                    editor.selection.setSelectionAnchor(anchor.row, anchor.column);
                    editor.selection.selectToPosition(cursor);
                }
            }
            else {
                editor.selection.selectToPosition(cursor);
            }
    
            editor.renderer.scrollCursorIntoView();
        };
    
        event.capture(editor.container, onMouseSelection, onMouseSelectionEnd);
        var timerId = setInterval(onSelectionInterval, 20);
    
        return event.preventDefault(e);
    };
    
    this.onMouseDoubleClick = function(e) {
        this.editor.selection.selectWord();
        this.$clickSelection = this.editor.getSelectionRange();
    };
    
    this.onMouseTripleClick = function(e) {
        this.editor.selection.selectLine();
        this.$clickSelection = this.editor.getSelectionRange();
    };
    
    this.onMouseWheel = function(e) {
        var speed = this.$scrollSpeed * 2;
    
        this.editor.renderer.scrollBy(e.wheelX * speed, e.wheelY * speed);
        return event.preventDefault(e);
    };


}).call(MouseHandler.prototype);

exports.MouseHandler = MouseHandler;
});