/*!
 * Ext JS Library 3.4.0
 * Copyright(c) 2006-2011 Sencha Inc.
 * licensing@sencha.com
 * http://www.sencha.com/license
 */
Ext.ns('Ext.ux.grid');

/**
 * @class Ext.ux.grid.RowEditor
 * @extends Ext.Panel
 * Plugin (ptype = 'roweditor') that adds the ability to rapidly edit full rows in a grid.
 * A validation mode may be enabled which uses AnchorTips to notify the user of all
 * validation errors at once.
 *
 * @ptype roweditor
 */
Ext.ux.grid.RowEditor = Ext.extend(Ext.Panel, {
    floating: true,
    shadow: false,
    layout: 'hbox',
    cls: 'x-small-editor',
    buttonAlign: 'center',
    baseCls: 'x-row-editor',
    elements: 'header,footer,body',
    frameWidth: 5,
    buttonPad: 3,
    clicksToEdit: 'auto',
    monitorValid: true,
    focusDelay: 250,
    errorSummary: true,

    saveText: 'Save',
    cancelText: 'Cancel',
    commitChangesText: 'You need to commit or cancel your changes',
    errorText: 'Errors',

    defaults: {
        normalWidth: true
    },

    initComponent: function(){
        Ext.ux.grid.RowEditor.superclass.initComponent.call(this);
        this.addEvents(
            /**
             * @event beforeedit
             * Fired before the row editor is activated.
             * If the listener returns <tt>false</tt> the editor will not be activated.
             * @param {Ext.ux.grid.RowEditor} roweditor This object
             * @param {Number} rowIndex The rowIndex of the row just edited
             */
            'beforeedit',
            /**
             * @event canceledit
             * Fired when the editor is cancelled.
             * @param {Ext.ux.grid.RowEditor} roweditor This object
             * @param {Boolean} forced True if the cancel button is pressed, false is the editor was invalid.
             */
            'canceledit',
            /**
             * @event validateedit
             * Fired after a row is edited and passes validation.
             * If the listener returns <tt>false</tt> changes to the record will not be set.
             * @param {Ext.ux.grid.RowEditor} roweditor This object
             * @param {Object} changes Object with changes made to the record.
             * @param {Ext.data.Record} r The Record that was edited.
             * @param {Number} rowIndex The rowIndex of the row just edited
             */
            'validateedit',
            /**
             * @event afteredit
             * Fired after a row is edited and passes validation.  This event is fired
             * after the store's update event is fired with this edit.
             * @param {Ext.ux.grid.RowEditor} roweditor This object
             * @param {Object} changes Object with changes made to the record.
             * @param {Ext.data.Record} r The Record that was edited.
             * @param {Number} rowIndex The rowIndex of the row just edited
             */
            'afteredit'
        );
    },

    init: function(grid){
        this.grid = grid;
        this.ownerCt = grid;
        if(this.clicksToEdit === 2){
            grid.on('rowdblclick', this.onRowDblClick, this);
        }else{
            grid.on('rowclick', this.onRowClick, this);
            if(Ext.isIE){
                grid.on('rowdblclick', this.onRowDblClick, this);
            }
        }

        // stopEditing without saving when a record is removed from Store.
        grid.getStore().on('remove', function() {
            this.stopEditing(false);
        },this);

        grid.on({
            scope: this,
            keydown: this.onGridKey,
            columnresize: this.verifyLayout,
            columnmove: this.refreshFields,
            reconfigure: this.refreshFields,
            beforedestroy : this.beforedestroy,
            destroy : this.destroy,
            bodyscroll: {
                buffer: 250,
                fn: this.positionButtons
            }
        });
        grid.getColumnModel().on('hiddenchange', this.verifyLayout, this, {delay:1});
        grid.getView().on('refresh', this.stopEditing.createDelegate(this, []));
    },

    beforedestroy: function() {
        this.stopMonitoring();
        this.grid.getStore().un('remove', this.onStoreRemove, this);
        this.stopEditing(false);
        Ext.destroy(this.btns, this.tooltip);
    },

    refreshFields: function(){
        this.initFields();
        this.verifyLayout();
    },

    isDirty: function(){
        var dirty;
        this.items.each(function(f){
            if(String(this.values[f.id]) !== String(f.getValue())){
                dirty = true;
                return false;
            }
        }, this);
        return dirty;
    },

    startEditing: function(rowIndex, doFocus){
        if(this.editing && this.isDirty()){
            this.showTooltip(this.commitChangesText);
            return;
        }
        if(Ext.isObject(rowIndex)){
            rowIndex = this.grid.getStore().indexOf(rowIndex);
        }
        if(this.fireEvent('beforeedit', this, rowIndex) !== false){
            this.editing = true;
            var g = this.grid, view = g.getView(),
                row = view.getRow(rowIndex),
                record = g.store.getAt(rowIndex);

            this.record = record;
            this.rowIndex = rowIndex;
            this.values = {};
            if(!this.rendered){
                this.render(view.getEditorParent());
            }
            var w = Ext.fly(row).getWidth();
            this.setSize(w);
            if(!this.initialized){
                this.initFields();
            }
            var cm = g.getColumnModel(), fields = this.items.items, f, val;
            for(var i = 0, len = cm.getColumnCount(); i < len; i++){
                val = this.preEditValue(record, cm.getDataIndex(i));
                f = fields[i];
                f.setValue(val);
                this.values[f.id] = Ext.isEmpty(val) ? '' : val;
            }
            this.verifyLayout(true);
            if(!this.isVisible()){
                this.setPagePosition(Ext.fly(row).getXY());
            } else{
                this.el.setXY(Ext.fly(row).getXY(), {duration:0.15});
            }
            if(!this.isVisible()){
                this.show().doLayout();
            }
            if(doFocus !== false){
                this.doFocus.defer(this.focusDelay, this);
            }
        }
    },

    stopEditing : function(saveChanges){
        this.editing = false;
        if(!this.isVisible()){
            return;
        }
        if(saveChanges === false || !this.isValid()){
            this.hide();
            this.fireEvent('canceledit', this, saveChanges === false);
            return;
        }
        var changes = {},
            r = this.record,
            hasChange = false,
            cm = this.grid.colModel,
            fields = this.items.items;
        for(var i = 0, len = cm.getColumnCount(); i < len; i++){
            if(!cm.isHidden(i)){
                var dindex = cm.getDataIndex(i);
                if(!Ext.isEmpty(dindex)){
                    var oldValue = r.data[dindex],
                        value = this.postEditValue(fields[i].getValue(), oldValue, r, dindex);
                    if(String(oldValue) !== String(value)){
                        changes[dindex] = value;
                        hasChange = true;
                    }
                }
            }
        }
        if(hasChange && this.fireEvent('validateedit', this, changes, r, this.rowIndex) !== false){
            r.beginEdit();
            Ext.iterate(changes, function(name, value){
                r.set(name, value);
            });
            r.endEdit();
            this.fireEvent('afteredit', this, changes, r, this.rowIndex);
        } else {
            this.fireEvent('canceledit', this, false);
        }
        this.hide();
    },

    verifyLayout: function(force){
        if(this.el && (this.isVisible() || force === true)){
            var row = this.grid.getView().getRow(this.rowIndex);
            this.setSize(Ext.fly(row).getWidth(), Ext.isIE ? Ext.fly(row).getHeight() + 9 : undefined);
            var cm = this.grid.colModel, fields = this.items.items;
            for(var i = 0, len = cm.getColumnCount(); i < len; i++){
                if(!cm.isHidden(i)){
                    var adjust = 0;
                    if(i === (len - 1)){
                        adjust += 3; // outer padding
                    } else{
                        adjust += 1;
                    }
                    fields[i].show();
                    fields[i].setWidth(cm.getColumnWidth(i) - adjust);
                } else{
                    fields[i].hide();
                }
            }
            this.doLayout();
            this.positionButtons();
        }
    },

    slideHide : function(){
        this.hide();
    },

    initFields: function(){
        var cm = this.grid.getColumnModel(), pm = Ext.layout.ContainerLayout.prototype.parseMargins;
        this.removeAll(false);
        for(var i = 0, len = cm.getColumnCount(); i < len; i++){
            var c = cm.getColumnAt(i),
                ed = c.getEditor();
            if(!ed){
                ed = c.displayEditor || new Ext.form.DisplayField();
            }
            if(i == 0){
                ed.margins = pm('0 1 2 1');
            } else if(i == len - 1){
                ed.margins = pm('0 0 2 1');
            } else{
                if (Ext.isIE) {
                    ed.margins = pm('0 0 2 0');
                }
                else {
                    ed.margins = pm('0 1 2 0');
                }
            }
            ed.setWidth(cm.getColumnWidth(i));
            ed.column = c;
            if(ed.ownerCt !== this){
                ed.on('focus', this.ensureVisible, this);
                ed.on('specialkey', this.onKey, this);
            }
            this.insert(i, ed);
        }
        this.initialized = true;
    },

    onKey: function(f, e){
        if(e.getKey() === e.ENTER){
            this.stopEditing(true);
            e.stopPropagation();
        }
    },

    onGridKey: function(e){
        if(e.getKey() === e.ENTER && !this.isVisible()){
            var r = this.grid.getSelectionModel().getSelected();
            if(r){
                var index = this.grid.store.indexOf(r);
                this.startEditing(index);
                e.stopPropagation();
            }
        }
    },

    ensureVisible: function(editor){
        if(this.isVisible()){
             this.grid.getView().ensureVisible(this.rowIndex, this.grid.colModel.getIndexById(editor.column.id), true);
        }
    },

    onRowClick: function(g, rowIndex, e){
        if(this.clicksToEdit == 'auto'){
            var li = this.lastClickIndex;
            this.lastClickIndex = rowIndex;
            if(li != rowIndex && !this.isVisible()){
                return;
            }
        }
        this.startEditing(rowIndex, false);
        this.doFocus.defer(this.focusDelay, this, [e.getPoint()]);
    },

    onRowDblClick: function(g, rowIndex, e){
        this.startEditing(rowIndex, false);
        this.doFocus.defer(this.focusDelay, this, [e.getPoint()]);
    },

    onRender: function(){
        Ext.ux.grid.RowEditor.superclass.onRender.apply(this, arguments);
        this.el.swallowEvent(['keydown', 'keyup', 'keypress']);
        this.btns = new Ext.Panel({
            baseCls: 'x-plain',
            cls: 'x-btns',
            elements:'body',
            layout: 'table',
            width: (this.minButtonWidth * 2) + (this.frameWidth * 2) + (this.buttonPad * 4), // width must be specified for IE
            items: [{
                ref: 'saveBtn',
                itemId: 'saveBtn',
                xtype: 'button',
                text: this.saveText,
                width: this.minButtonWidth,
                handler: this.stopEditing.createDelegate(this, [true])
            }, {
                xtype: 'button',
                text: this.cancelText,
                width: this.minButtonWidth,
                handler: this.stopEditing.createDelegate(this, [false])
            }]
        });
        this.btns.render(this.bwrap);
    },

    afterRender: function(){
        Ext.ux.grid.RowEditor.superclass.afterRender.apply(this, arguments);
        this.positionButtons();
        if(this.monitorValid){
            this.startMonitoring();
        }
    },

    onShow: function(){
        if(this.monitorValid){
            this.startMonitoring();
        }
        Ext.ux.grid.RowEditor.superclass.onShow.apply(this, arguments);
    },

    onHide: function(){
        Ext.ux.grid.RowEditor.superclass.onHide.apply(this, arguments);
        this.stopMonitoring();
        this.grid.getView().focusRow(this.rowIndex);
    },

    positionButtons: function(){
        if(this.btns){
            var g = this.grid,
                h = this.el.dom.clientHeight,
                view = g.getView(),
                scroll = view.scroller.dom.scrollLeft,
                bw = this.btns.getWidth(),
                width = Math.min(g.getWidth(), g.getColumnModel().getTotalWidth());

            this.btns.el.shift({left: (width/2)-(bw/2)+scroll, top: h - 2, stopFx: true, duration:0.2});
        }
    },

    // private
    preEditValue : function(r, field){
        var value = r.data[field];
        return this.autoEncode && typeof value === 'string' ? Ext.util.Format.htmlDecode(value) : value;
    },

    // private
    postEditValue : function(value, originalValue, r, field){
        return this.autoEncode && typeof value == 'string' ? Ext.util.Format.htmlEncode(value) : value;
    },

    doFocus: function(pt){
        if(this.isVisible()){
            var index = 0,
                cm = this.grid.getColumnModel(),
                c;
            if(pt){
                index = this.getTargetColumnIndex(pt);
            }
            for(var i = index||0, len = cm.getColumnCount(); i < len; i++){
                c = cm.getColumnAt(i);
                if(!c.hidden && c.getEditor()){
                    c.getEditor().focus();
                    break;
                }
            }
        }
    },

    getTargetColumnIndex: function(pt){
        var grid = this.grid,
            v = grid.view,
            x = pt.left,
            cms = grid.colModel.config,
            i = 0,
            match = false;
        for(var len = cms.length, c; c = cms[i]; i++){
            if(!c.hidden){
                if(Ext.fly(v.getHeaderCell(i)).getRegion().right >= x){
                    match = i;
                    break;
                }
            }
        }
        return match;
    },

    startMonitoring : function(){
        if(!this.bound && this.monitorValid){
            this.bound = true;
            Ext.TaskMgr.start({
                run : this.bindHandler,
                interval : this.monitorPoll || 200,
                scope: this
            });
        }
    },

    stopMonitoring : function(){
        this.bound = false;
        if(this.tooltip){
            this.tooltip.hide();
        }
    },

    isValid: function(){
        var valid = true;
        this.items.each(function(f){
            if(!f.isValid(true)){
                valid = false;
                return false;
            }
        });
        return valid;
    },

    // private
    bindHandler : function(){
        if(!this.bound){
            return false; // stops binding
        }
        var valid = this.isValid();
        if(!valid && this.errorSummary){
            this.showTooltip(this.getErrorText().join(''));
        }
        this.btns.saveBtn.setDisabled(!valid);
        this.fireEvent('validation', this, valid);
    },

    lastVisibleColumn : function() {
        var i = this.items.getCount() - 1,
            c;
        for(; i >= 0; i--) {
            c = this.items.items[i];
            if (!c.hidden) {
                return c;
            }
        }
    },

    showTooltip: function(msg){
        var t = this.tooltip;
        if(!t){
            t = this.tooltip = new Ext.ToolTip({
                maxWidth: 600,
                cls: 'errorTip',
                width: 300,
                title: this.errorText,
                autoHide: false,
                anchor: 'left',
                anchorToTarget: true,
                mouseOffset: [40,0]
            });
        }
        var v = this.grid.getView(),
            top = parseInt(this.el.dom.style.top, 10),
            scroll = v.scroller.dom.scrollTop,
            h = this.el.getHeight();

        if(top + h >= scroll){
            t.initTarget(this.lastVisibleColumn().getEl());
            if(!t.rendered){
                t.show();
                t.hide();
            }
            t.body.update(msg);
            t.doAutoWidth(20);
            t.show();
        }else if(t.rendered){
            t.hide();
        }
    },

    getErrorText: function(){
        var data = ['<ul>'];
        this.items.each(function(f){
            if(!f.isValid(true)){
                data.push('<li>', f.getActiveError(), '</li>');
            }
        });
        data.push('</ul>');
        return data;
    }
});
Ext.preg('roweditor', Ext.ux.grid.RowEditor);
