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 * Copyright (c) 2010, Ajax.org B.V.
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 *       notice, this list of conditions and the following disclaimer.
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 *       names of its contributors may be used to endorse or promote products
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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define(function (require, exports, module) {
    "use strict";

    var event = require("../lib/event");
    var useragent = require("../lib/useragent");
    var DefaultHandlers = require("./default_handlers").DefaultHandlers;
    var DefaultGutterHandler = require("./default_gutter_handler").GutterHandler;
    var MouseEvent = require("./mouse_event").MouseEvent;
    var DragdropHandler = require("./dragdrop_handler").DragdropHandler;
    var config = require("../config");

    var MouseHandler = function (editor) {
        var _self = this;
        this.editor = editor;

        new DefaultHandlers(this);
        new DefaultGutterHandler(this);
        new DragdropHandler(this);

        var focusEditor = function (e) {
            // because we have to call event.preventDefault() any window on ie and iframes
            // on other browsers do not get focus, so we have to call window.focus() here
            var windowBlurred = !document.hasFocus || !document.hasFocus()
                || !editor.isFocused() && document.activeElement == (editor.textInput && editor.textInput.getElement())
            if (windowBlurred)
                window.focus();
            editor.focus();
        };

        var mouseTarget = editor.renderer.getMouseEventTarget();
        event.addListener(mouseTarget, "click", this.onMouseEvent.bind(this, "click"));
        event.addListener(mouseTarget, "mousemove", this.onMouseMove.bind(this, "mousemove"));
        event.addMultiMouseDownListener([
            mouseTarget,
            editor.renderer.scrollBarV && editor.renderer.scrollBarV.inner,
            editor.renderer.scrollBarH && editor.renderer.scrollBarH.inner,
            editor.textInput && editor.textInput.getElement()
        ].filter(Boolean), [400, 300, 250], this, "onMouseEvent");
        event.addMouseWheelListener(editor.container, this.onMouseWheel.bind(this, "mousewheel"));
        event.addTouchMoveListener(editor.container, this.onTouchMove.bind(this, "touchmove"));

        var gutterEl = editor.renderer.$gutter;
        event.addListener(gutterEl, "mousedown", this.onMouseEvent.bind(this, "guttermousedown"));
        event.addListener(gutterEl, "click", this.onMouseEvent.bind(this, "gutterclick"));
        event.addListener(gutterEl, "dblclick", this.onMouseEvent.bind(this, "gutterdblclick"));
        event.addListener(gutterEl, "mousemove", this.onMouseEvent.bind(this, "guttermousemove"));

        event.addListener(mouseTarget, "mousedown", focusEditor);
        event.addListener(gutterEl, "mousedown", focusEditor);
        if (useragent.isIE && editor.renderer.scrollBarV) {
            event.addListener(editor.renderer.scrollBarV.element, "mousedown", focusEditor);
            event.addListener(editor.renderer.scrollBarH.element, "mousedown", focusEditor);
        }

        editor.on("mousemove", function (e) {
            if (_self.state || _self.$dragDelay || !_self.$dragEnabled)
                return;

            var character = editor.renderer.screenToTextCoordinates(e.x, e.y);
            var range = editor.session.selection.getRange();
            var renderer = editor.renderer;

            if (!range.isEmpty() && range.insideStart(character.row, character.column)) {
                renderer.setCursorStyle("default");
            } else {
                renderer.setCursorStyle("");
            }
        });
    };

    (function () {
        this.onMouseEvent = function (name, e) {
            this.editor._emit(name, new MouseEvent(e, this.editor));
        };

        this.onMouseMove = function (name, e) {
            // optimization, because mousemove doesn't have a default handler.
            var listeners = this.editor._eventRegistry && this.editor._eventRegistry.mousemove;
            if (!listeners || !listeners.length)
                return;

            this.editor._emit(name, new MouseEvent(e, this.editor));
        };

        this.onMouseWheel = function (name, e) {
            var mouseEvent = new MouseEvent(e, this.editor);
            mouseEvent.speed = this.$scrollSpeed * 2;
            mouseEvent.wheelX = e.wheelX;
            mouseEvent.wheelY = e.wheelY;

            this.editor._emit(name, mouseEvent);
        };

        this.onTouchMove = function (name, e) {
            var mouseEvent = new MouseEvent(e, this.editor);
            mouseEvent.speed = 1;//this.$scrollSpeed * 2;
            mouseEvent.wheelX = e.wheelX;
            mouseEvent.wheelY = e.wheelY;
            this.editor._emit(name, mouseEvent);
        };

        this.setState = function (state) {
            this.state = state;
        };

        this.captureMouse = function (ev, mouseMoveHandler) {
            this.x = ev.x;
            this.y = ev.y;

            this.isMousePressed = true;

            // do not move textarea during selection
            var renderer = this.editor.renderer;
            if (renderer.$keepTextAreaAtCursor)
                renderer.$keepTextAreaAtCursor = null;

            var self = this;
            var onMouseMove = function (e) {
                if (!e) return;
                // if editor is loaded inside iframe, and mouseup event is outside
                // we won't recieve it, so we cancel on first mousemove without button
                if (useragent.isWebKit && !e.which && self.releaseMouse)
                    return self.releaseMouse();

                self.x = e.clientX;
                self.y = e.clientY;
                mouseMoveHandler && mouseMoveHandler(e);
                self.mouseEvent = new MouseEvent(e, self.editor);
                self.$mouseMoved = true;
            };

            var onCaptureEnd = function (e) {
                clearInterval(timerId);
                onCaptureInterval();
                self[self.state + "End"] && self[self.state + "End"](e);
                self.state = "";
                if (renderer.$keepTextAreaAtCursor == null) {
                    renderer.$keepTextAreaAtCursor = true;
                    renderer.$moveTextAreaToCursor();
                }
                self.isMousePressed = false;
                self.$onCaptureMouseMove = self.releaseMouse = null;
                e && self.onMouseEvent("mouseup", e);
            };

            var onCaptureInterval = function () {
                self[self.state] && self[self.state]();
                self.$mouseMoved = false;
            };

            if (useragent.isOldIE && ev.domEvent.type == "dblclick") {
                return setTimeout(function () {
                    onCaptureEnd(ev);
                });
            }

            self.$onCaptureMouseMove = onMouseMove;
            self.releaseMouse = event.capture(this.editor.container, onMouseMove, onCaptureEnd);
            var timerId = setInterval(onCaptureInterval, 20);
        };
        this.releaseMouse = null;
        this.cancelContextMenu = function () {
            var stop = function (e) {
                if (e && e.domEvent && e.domEvent.type != "contextmenu")
                    return;
                this.editor.off("nativecontextmenu", stop);
                if (e && e.domEvent)
                    event.stopEvent(e.domEvent);
            }.bind(this);
            setTimeout(stop, 10);
            this.editor.on("nativecontextmenu", stop);
        };
    }).call(MouseHandler.prototype);

    config.defineOptions(MouseHandler.prototype, "mouseHandler", {
        scrollSpeed: {initialValue: 2},
        dragDelay: {initialValue: (useragent.isMac ? 150 : 0)},
        dragEnabled: {initialValue: true},
        focusTimout: {initialValue: 0},
        tooltipFollowsMouse: {initialValue: true}
    });


    exports.MouseHandler = MouseHandler;
});
