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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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 *       notice, this list of conditions and the following disclaimer in the
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 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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;
});
