/*****************************************************************
 Copyright (c) 2008 Patrick Avella
 http://javascriptwindowlibrary.com
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
 files (the "Software"), to deal in the Software without
 restriction, including without limitation the rights to use,
 copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following
 conditions:
 
 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.
 *****************************************************************/

/*******
 Version 0.3 
 ********/

// Some globals you can change
var show_close_button = 1;
var show_maximize_button = 1;
var min_win_size = 21;
var inner_frame_offset = 40; // size of title + statbar
var mydow_default_w = 400;
var mydow_default_h = 300;


// We store all window runtime info in a hash of hashes
// where the top level key is the window handle
var mydows = new Hash();

// Things you can watch. Dragxoffset is used internally
// by resize
var mouse = {
    "x": 0,
    "y": 0,
    "delta_x": 0,
    "delta_y": 0
};
var dragxoffset = 0;
var dragyoffset = 0;

var ie = 0;


// some classes to describe how things should look
var mydow_class_frame = {
    'position': 'absolute',
    'top': '10px',
    'left': '10px',
    'height': 'auto',
    'background': '#0000A0',
    'border': 'solid 1px black',
    'padding': '1px',
    'width': mydow_default_w + 'px',
    'height': mydow_default_h + 'px',
    'overflow': 'hidden',
    'zIndex': 4,
    'MozBorderRadius': '.5em'
}



var mydow_class_title = {
    'padding': '2px',
    'text-align ': 'left',
    'background': 'url(img/grad.gif) #0000A0',
    'font': ' bold 10px sans-serif',
    'height': '15px',
    'color': '#FFFFFF',
    'border': '1px solid #0000A0',
    'white-space': 'nowrap',
    'overflow': 'hidden',
    'MozBorderRadius': '.5em .5em 0em 0em'
};

var mydow_class_body = {
    'border': '1px solid black',
    'border-bottom': 'none',
    'background': '#FFFFFF',
    'font': '16px sans-serif',
    'color': '#000000',
    'overflow': 'auto',
    'height': 'auto'
};

var mydow_class_statbar = {
    'text-align': 'left',
    'background': 'lightgrey',
    'color': '#505050',
    'height': '15px',
    'line-height': '15px',
    'font': '10px sans-serif',
    'border': '1px solid black',
    'white-space': 'nowrap',
    'overflow': 'hidden',
    'MozBorderRadius': '0em 0em .5em .5em'
};



// ------------------------------

// given the handle, load an ajax response into a window


function mydow_load(handle, url) {
    new Ajax.Updater(handle + '_body', url, {
        method: 'get'
    }); //, evalScripts: true });
}

// lowers all windows and sets opacity


function lower_all() {
    mydows.each(function (obj) {
        $(obj.key + "_frame").setStyle({
            "zIndex": 1
        });
        $(obj.key + "_frame").setOpacity(.5);
    });
}



function mydows_init() {
    if (navigator.userAgent.indexOf("MSIE") > -1) {
        mydow_class_title.height = 20;
        ie = -2; // fix for box model
    }

    document.observe('mousemove', function (e) {
        mouse.delta_x = e.pointerX() - mouse.x;
        mouse.delta_y = e.pointerY() - mouse.y;
        mouse.x = e.pointerX();
        mouse.y = e.pointerY();
        mydows_drag(); // if there's anything draggable
    });

    document.observe('mousedown', function (e) {
        var element = Event.element(e);
        if (element.readAttribute("id")) if (element.readAttribute("id").endsWith("_frame")) {
            mydows_stop_select(true);
        }
    });

    document.observe('mouseup', function (e) {
        mydows.each(function (h) {
            mydow_property(h.key, "drag", 0);
            mydow_property(h.key, "resize", 0);
            $(h.key + "_title").setStyle({
                "cursor": "default"
            });
            mydows_stop_select(false);
        });
    });


}

// This function handles all resizing and dragging
// called internally onmousemove


function mydows_drag() {

    mydows.each(function (obj) {


        if (obj.value.get("drag") == 1) {
            $(obj.key + "_frame").setStyle({
                "top": (mouse.y - dragyoffset > -1 ? mouse.y - dragyoffset : 0)+"px",
                "left": (mouse.x - dragxoffset > -1 ? mouse.x - dragxoffset : 0)+"px"
            });
        }

        // E RESIZE
        else if (obj.value.get("resize") == "e-resize") {
            var new_width = mouse.x - $(obj.key + "_frame").cumulativeOffset().left;
            console.log(new_width > min_win_size ? new_width : min_win_size);
            $(obj.key + "_frame").setStyle({
                "width": (new_width > min_win_size ? new_width : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "width": (new_width - 2 + ie > min_win_size - 2 ? new_width - 2 + ie + ie : min_win_size - 2)+"px"
            });
            $(obj.key + "_statbar").setStyle({
                "width": ($(obj.key + "_body").getWidth() - 2 - ie)+"px"
            });
        }

        // W RESIZE
        else if (obj.value.get("resize") == "w-resize") {
            var new_width = obj.value.get("resize_anchor_x") - mouse.x;
            $(obj.key + "_frame").setStyle({
                "left": (mouse.x)+"px",
                "width": (new_width > min_win_size ? new_width : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "width": (new_width - 2 + ie > min_win_size - 2 ? new_width - 2 + ie : min_win_size - 2)+"px"
            });
            $(obj.key + "_statbar").setStyle({
                "width": ($(obj.key + "_body").getWidth() - 2 - ie)+"px"
            }); 
        }

        // N RESIZE
        else if (obj.value.get("resize") == "n-resize") {
            var new_height = obj.value.get("resize_anchor_y") - mouse.y;
            $(obj.key + "_frame").setStyle({
                "top": (mouse.y)+"px",
                "height": (new_height > min_win_size ? new_height : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "height": (new_height - inner_frame_offset > min_win_size - inner_frame_offset ? new_height - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
            });
        }

        // NW RESIZE
        else if (obj.value.get("resize") == "nw-resize") {
            var new_width = obj.value.get("resize_anchor_x") - mouse.x;
            var new_height = obj.value.get("resize_anchor_y") - mouse.y;
            $(obj.key + "_frame").setStyle({
                "top": (mouse.y)+"px",
                "left": (mouse.x)+"px",
                "width": (new_width > min_win_size ? new_width : min_win_size)+"px",
                "height": (new_height > min_win_size ? new_height : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "width": (new_width - 2 + ie > min_win_size - 2 ? new_width - 2 + ie : min_win_size - 2)+"px",
                "height": (new_height - inner_frame_offset > min_win_size - inner_frame_offset ? new_height - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
            });
            $(obj.key + "_statbar").setStyle({
                "width": ($(obj.key + "_body").getWidth() - 2 - ie)+"px"
            });
        }

        // NE RESIZE
        else if (obj.value.get("resize") == "ne-resize") {
            var new_width = mouse.x - $(obj.key + "_frame").cumulativeOffset().left;
            var new_height = obj.value.get("resize_anchor_y") - mouse.y;
            $(obj.key + "_frame").setStyle({
                "top": (mouse.y)+"px",
                "width": (new_width > min_win_size ? new_width : min_win_size)+"px",
                "height": (new_height > min_win_size ? new_height : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "width": (new_width - 2 + ie > min_win_size - 2 ? new_width - 2 + ie : min_win_size - 2)+"px",
                "height": (new_height - inner_frame_offset > min_win_size - inner_frame_offset ? new_height - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
            });
            $(obj.key + "_statbar").setStyle({
                "width": ($(obj.key + "_body").getWidth() - 2 - ie)+"px"
            });
        }


        // SE RESIZE
        else if (obj.value.get("resize") == "se-resize") {
            var new_width = mouse.x - $(obj.key + "_frame").cumulativeOffset().left;
            var new_height = mouse.y - $(obj.key + "_frame").cumulativeOffset().top;
            $(obj.key + "_frame").setStyle({
                "width": (new_width > min_win_size ? new_width : min_win_size)+"px",
                "height": (new_height > min_win_size ? new_height : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "width": (new_width - 2 + ie > min_win_size - 2 ? new_width - 2 + ie : min_win_size - 2)+"px",
                "height": (new_height - inner_frame_offset > min_win_size - inner_frame_offset ? new_height - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
            });
            $(obj.key + "_statbar").setStyle({
                "width": ($(obj.key + "_body").getWidth() - 2 - ie)+"px"
            });
        }

        // SW RESIZE
        else if (obj.value.get("resize") == "sw-resize") {
            var new_width = obj.value.get("resize_anchor_x") - mouse.x;
            var new_height = mouse.y - $(obj.key + "_frame").cumulativeOffset().top;
            $(obj.key + "_frame").setStyle({
                "left": (mouse.x)+"px",
                "width": (new_width > min_win_size ? new_width : min_win_size)+"px",
                "height": (new_height > min_win_size ? new_height : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "width": (new_width - 2 + ie > min_win_size - 2 ? new_width - 2 + ie : min_win_size - 2)+"px",
                "height": (new_height - inner_frame_offset > min_win_size - inner_frame_offset ? new_height - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
            });
            $(obj.key + "_statbar").setStyle({
                "width": ($(obj.key + "_body").getWidth() - 2 - ie)+"px"
            });
        }

        // S RESIZE
        else if (obj.value.get("resize") == "s-resize") {
            var new_height = mouse.y - $(obj.key + "_frame").cumulativeOffset().top;
            $(obj.key + "_frame").setStyle({
                "height": (new_height > min_win_size ? new_height : min_win_size)+"px"
            });
            $(obj.key + "_body").setStyle({
                "height": (new_height - inner_frame_offset > min_win_size - inner_frame_offset ? new_height - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
            });
        }


    });
}

function mydows_stop_select(state) {
    if (state) { // on
        document.onselectstart = new Function('return false');
        document.onmousedown = function (e) {
            return false;
        };
        document.onclick = function () {
            return true;
        };
    } else { // off
        document.onselectstart = new Function("return true");
        if (window.sidebar) {
            document.onmousedown = function () {
                return true;
            };
        }
    }
}

function kill_mydow(handle) {
    $(handle + "_frame").remove();
    mydows.unset(handle);
}

// This function is what you call with a handle name to create
// a new window. 


function new_mydow(handle) {
    if (!mydows.get(handle)) {
        // A frame is the top level of the window
        var myframe = new Element("div", {
            "id": handle + "_frame",
            "class": "mydow_frame"
        });
        myframe.setStyle(mydow_class_frame);


        // Create Title Bar with optional buttons
        var mytitle = new Element("div", {
            "id": handle + "_title",
            "class": "mydow_title"
        }).update("<span id='" + handle + "_title_msg'>" + handle + "</span>");
        mytitle.setStyle(mydow_class_title);

        if (show_maximize_button) {
            var mymaximizebutton = new Element("img", {
                "id": handle + "_maximizebutton",
                "align": "right",
                "src": "img/maximize0.gif",
                "onmouseover": "this.src='img/maximize1.gif';",
                "onmouseout": "this.src='img/maximize0.gif';"
            });
            mytitle.insert({
                "top": mymaximizebutton
            });
        }

        if (show_close_button) {
            var myxbutton = new Element("img", {
                "id": handle + "_xbutton",
                "align": "right",
                "src": "img/close0.gif",
                "onmouseover": "this.src='img/close1.gif';",
                "onmouseout": "this.src='img/close0.gif';"
            });
            mytitle.insert({
                "top": myxbutton
            });
        }

        // Create the main body of content
        var mybody = new Element("div", {
            "id": handle + "_body",
            "class": "mydow_body"
        }).update("&nbsp;");
        mybody.setStyle(mydow_class_body);

        //Create a cool status bar at the bottom
        var mystatbar = new Element("div", {
            "id": handle + "_statbar",
            "class": "mydow_statbar"
        });
        mystatbar.setStyle(mydow_class_statbar);

        // From here everything is appended
        myframe.insert({
            "top": mystatbar
        });
        myframe.insert({
            "top": mybody
        });
        myframe.insert({
            "top": mytitle
        });
        $(document.body).insert({
            "top": myframe
        });

        // put it somewhere in the middle
        mydow_set_position(handle, document.viewport.getScrollOffsets().left + 300, document.viewport.getScrollOffsets().top + 200, mydow_default_w, mydow_default_h);

        // let it pop in front
        lower_all();

        // Set all default properties of the window
        mydows.set(handle, new Hash({
            "resize": 0,
            "resize_anchor_x": 0,
            "resize_anchor_y": 0,
            "drag": 0,
            "maximized": 0,
            "old_coords": {
                'x': 0,
                'y': 0,
                'w': 0,
                'h': 0
            }
        }));


        // DRAGGABLE TITLE BAR
        mytitle.observe('mousedown', function (e) {
            // We need to find our offset so it looks and feels natural
            dragxoffset = mouse.x - myframe.cumulativeOffset().left;
            dragyoffset = mouse.y - myframe.cumulativeOffset().top;
            mytitle.setStyle({
                "cursor": "move"
            });
            mydow_property(handle, "drag", 1);
            mydows_stop_select(true);
        });

        // Prevent text selection over statbar
        mystatbar.observe('mousedown', function (e) {
            mydows_stop_select(true);
        });

        myframe.observe('mousedown', function (e) {
            // Resize
            mydow_property(handle, "resize", myframe.getStyle("cursor"));
            mydow_property(handle, "resize_anchor_x", myframe.getWidth() + myframe.cumulativeOffset().left);
            mydow_property(handle, "resize_anchor_y", myframe.getHeight() + myframe.cumulativeOffset().top);
            // Z index
            lower_all();
            myframe.setStyle({
                "zIndex": 3
            });
            myframe.setOpacity(50);
        });

        //		mybody.observe('mousedown', function(e) {
        //			mydows_stop_select(false);
        //			});

        // Close Button
        if (show_close_button) myxbutton.observe('click', function (e) {
            myframe.remove();
            mydows.unset(handle);
        });

        // Maximize Button
        if (show_maximize_button) mymaximizebutton.observe('click', function (e) {
            if (mydows.get(handle).get("maximized")) { // return to size
                mydow_property(handle, "maximized", 0);
                myframe.setStyle({
                    'top': mydows.get(handle).get("old_coords").y+"px",
                    'left': mydows.get(handle).get("old_coords").x+"px",
                    'width': mydows.get(handle).get("old_coords").w+"px",
                    'height': mydows.get(handle).get("old_coords").h+"px"
                });
                mybody.setStyle({
                    "width": (mydows.get(handle).get("old_coords").w - 2 > min_win_size - 2 ? mydows.get(handle).get("old_coords").w - 2 + ie : min_win_size - 2)+"px",
                    "height": (mydows.get(handle).get("old_coords").h - inner_frame_offset > min_win_size - inner_frame_offset ? mydows.get(handle).get("old_coords").h - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
                });
                mystatbar.setStyle({
                    "width": (mybody.getWidth() - 2 - ie)+"px"
                });
            } else {
                window.scroll(0, 0);
                mydow_property(handle, "maximized", 1);
                mydows.get(handle).get("old_coords").x = myframe.getStyle("left");
                mydows.get(handle).get("old_coords").y = myframe.getStyle("top");
                mydows.get(handle).get("old_coords").w = myframe.getWidth();
                mydows.get(handle).get("old_coords").h = myframe.getHeight();
                var new_width = $(document.body).getWidth() + ie * 20; // 4 makes up for 2px border on frame
                var new_height = $(document.body).getHeight();
                myframe.setStyle({
                    'top': (5 - 2 * ie)+"px",
                    'left': (5 - 2 * ie)+"px",
                    'width': (new_width)+"px",
                    'height': (new_height)+"px"
                });
                mybody.setStyle({
                    "width": (new_width - 2 + ie > min_win_size - 2 ? new_width - 2 + ie : min_win_size - 2)+"px",
                    "height": (new_height - inner_frame_offset > min_win_size - inner_frame_offset ? new_height - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
                });
                mystatbar.setStyle({
                    "width": (mybody.getWidth() - 2 - ie)+"px"
                });
            }
        });


        // Resizer
        myframe.observe('mousemove', function (e) {
            var t_win = {
                x: myframe.cumulativeOffset().left,
                y: myframe.cumulativeOffset().top
            }
            //right edge
            if (mouse.x >= t_win.x + myframe.getWidth() - 10 && mouse.y >= t_win.y + 10 && mouse.y <= t_win.y + myframe.getHeight() - 10) {
                myframe.setStyle({
                    'cursor': 'e-resize'
                });
            }
            //bottom edge
            else if (mouse.x >= t_win.x + 10 && mouse.x <= t_win.x + myframe.getWidth() - 10 && mouse.y >= t_win.y + myframe.getHeight() - 10) {
                myframe.setStyle({
                    'cursor': 's-resize'
                });
            }
            //left edge
            else if (mouse.x <= t_win.x + 10 && mouse.y >= t_win.y + 10 && mouse.y <= t_win.y + myframe.getHeight() - 10) {
                myframe.setStyle({
                    'cursor': 'w-resize'
                });
            }
            //top edge
            else if (mouse.x <= t_win.x + myframe.getWidth() - 10 && mouse.x >= t_win.x + 10 && mouse.y <= t_win.y + 10) {
                myframe.setStyle({
                    'cursor': 'n-resize'
                });
            }
            //south east
            else if (mouse.x > t_win.x + myframe.getWidth() - 10 && mouse.y > t_win.y + myframe.getHeight() - 10) {
                myframe.setStyle({
                    'cursor': 'se-resize'
                });
            }
            //north east
            else if (mouse.x > t_win.x + myframe.getWidth() - 10 && mouse.y < t_win.y + 10) {
                myframe.setStyle({
                    'cursor': 'ne-resize'
                });
            }
            //south West
            else if (mouse.x < t_win.x + 10 && mouse.y > t_win.y + myframe.getHeight() - 10) {
                myframe.setStyle({
                    'cursor': 'sw-resize'
                });
            }
            //north West
            else if (mouse.x < t_win.x + 10 && mouse.y < t_win.y + 10) {
                myframe.setStyle({
                    'cursor': 'nw-resize'
                });
            } else {
                myframe.setStyle({
                    'cursor': 'default'
                });
                mydow_property(handle, "resize", 0);
            }
        });


    }

    // return useful information
    return {
        'handle': handle,
        'body': handle + "_body",
        'frame': handle + "_frame",
        'title': handle + "_title",
        'title_msg': handle + "_title_msg",
        'statbar': handle + "_statbar"
    };
}



function mydow_property(handle, prop, val) {
    var properties = mydows.get(handle);
    properties.set(prop, val);
    mydows.set(handle, properties);
}


function mydow_set_position(handle, x, y, w, h) {
    $(handle + "_frame").setStyle({
        'left': x+"px",
        'top': y+"px",
        'width': w+"px",
        'height': h+"px"
    });
    $(handle + "_body").setStyle({
        "width": (w - 2 > min_win_size - 2 ? w - 2 + ie : min_win_size - 2)+"px",
        "height": (h - inner_frame_offset > min_win_size - inner_frame_offset ? h - inner_frame_offset : min_win_size - inner_frame_offset)+"px"
    });
    $(handle + "_statbar").setStyle({
        "width": ($(handle + "_body").getWidth() - 2 - ie)+"px"
    });
}

function mydow_dimensions(handle) {
    var result = {
        'x': 0,
        'y': 0,
        'w': 0,
        'h': 0
    };
    result.x = $(handle + "_frame").cumulativeOffset().x;
    result.y = $(handle + "_frame").cumulativeOffset().y;
    result.w = $(handle + "_frame").getWidth();
    result.h = $(handle + "_frame").getHeight();
    return results;
}