mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-08-27 21:15:40 +02:00
The CMS preview causes unnecessary browser processing by loading a URL which should be considered "in transit" when a CMS redirect is set through the X-ControllerURL HTTP header. The CMS history processing will load this new URL, and cause a new preview URL to be loaded. Fixes https://github.com/silverstripe/silverstripe-translatable/issues/158
802 lines
22 KiB
JavaScript
802 lines
22 KiB
JavaScript
(function($) {
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$.entwine('ss.preview', function($){
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/**
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* Shows a previewable website state alongside its editable version in backend UI.
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*
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* Relies on the server responses to indicate if a preview is available for the
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* currently loaded admin interface - signified by class ".cms-previewable" being present.
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*
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* The preview options at the bottom are constructured by grabbing a SilverStripeNavigator
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* structure also provided by the backend.
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*/
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$('.cms-preview').entwine({
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/**
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* List of SilverStripeNavigator states (SilverStripeNavigatorItem classes) to search for.
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* The order is significant - if the state is not available, preview will start searching the list
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* from the beginning.
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*/
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AllowedStates: ['StageLink', 'LiveLink','ArchiveLink'],
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/**
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* API
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* Name of the current preview state - one of the "AllowedStates".
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*/
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CurrentStateName: null,
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/**
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* API
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* Current size selection.
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*/
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CurrentSizeName: 'auto',
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/**
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* Flags whether the preview is available on this CMS section.
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*/
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IsPreviewEnabled: false,
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/**
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* Mode in which the preview will be enabled.
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*/
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DefaultMode: 'split',
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Sizes: {
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auto: {
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width: '100%',
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height: '100%'
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},
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mobile: {
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width: '335px', // add 15px for approx desktop scrollbar
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height: '568px'
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},
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mobileLandscape: {
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width: '583px', // add 15px for approx desktop scrollbar
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height: '320px'
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},
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tablet: {
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width: '783px', // add 15px for approx desktop scrollbar
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height: '1024px'
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},
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tabletLandscape: {
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width: '1039px', // add 15px for approx desktop scrollbar
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height: '768px'
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},
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desktop: {
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width: '1024px',
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height: '800px'
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}
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},
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/**
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* API
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* Switch the preview to different state.
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* stateName can be one of the "AllowedStates".
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*
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* @param {String}
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* @param {Boolean} Set to FALSE to avoid persisting the state
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*/
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changeState: function(stateName, save) {
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var self = this, states = this._getNavigatorStates();
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if(save !== false) {
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$.each(states, function(index, state) {
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self.saveState('state', stateName);
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});
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}
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this.setCurrentStateName(stateName);
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this._loadCurrentState();
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this.redraw();
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return this;
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},
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/**
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* API
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* Change the preview mode.
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* modeName can be: split, content, preview.
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*/
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changeMode: function(modeName, save) {
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var container = $('.cms-container');
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if (modeName == 'split') {
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container.entwine('.ss').splitViewMode();
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this.setIsPreviewEnabled(true);
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this._loadCurrentState();
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} else if (modeName == 'content') {
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container.entwine('.ss').contentViewMode();
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this.setIsPreviewEnabled(false);
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// Do not load content as the preview is not visible.
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} else if (modeName == 'preview') {
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container.entwine('.ss').previewMode();
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this.setIsPreviewEnabled(true);
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this._loadCurrentState();
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} else {
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throw 'Invalid mode: ' + modeName;
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}
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if(save !== false) this.saveState('mode', modeName);
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this.redraw();
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return this;
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},
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/**
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* API
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* Change the preview size.
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* sizeName can be: auto, desktop, tablet, mobile.
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*/
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changeSize: function(sizeName) {
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var sizes = this.getSizes();
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this.setCurrentSizeName(sizeName);
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this.removeClass('auto desktop tablet mobile').addClass(sizeName);
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this.find('.preview-device-outer')
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.width(sizes[sizeName].width)
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.height(sizes[sizeName].height);
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this.find('.preview-device-inner')
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.width(sizes[sizeName].width);
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this.saveState('size', sizeName);
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this.redraw();
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return this;
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},
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/**
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* API
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* Update the visual appearance to match the internal preview state.
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*/
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redraw: function() {
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if(window.debug) console.log('redraw', this.attr('class'), this.get(0));
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// Update preview state selector.
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var currentStateName = this.getCurrentStateName();
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if (currentStateName) {
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this.find('.cms-preview-states').changeVisibleState(currentStateName);
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}
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// Update preview mode selectors.
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var layoutOptions = $('.cms-container').entwine('.ss').getLayoutOptions();
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if (layoutOptions) {
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// There are two mode selectors that we need to keep in sync. Redraw both.
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$('.preview-mode-selector').changeVisibleMode(layoutOptions.mode);
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}
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// Update preview size selector.
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var currentSizeName = this.getCurrentSizeName();
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if (currentSizeName) {
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this.find('.preview-size-selector').changeVisibleSize(this.getCurrentSizeName());
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}
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return this;
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},
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/**
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* Store the preview options for this page.
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*/
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saveState : function(name, value) {
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if(!window.localStorage) return;
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window.localStorage.setItem('cms-preview-state-' + name, value);
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},
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/**
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* Load previously stored preferences
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*/
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loadState : function(name) {
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if(!window.localStorage) return;
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return window.localStorage.getItem('cms-preview-state-' + name);
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},
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/**
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* Disable the area - it will not appear in the GUI.
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* Caveat: the preview will be automatically enabled when ".cms-previewable" class is detected.
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*/
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disablePreview: function() {
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this.setPendingURL(null);
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this._loadUrl('about:blank');
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this._block();
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this.changeMode('content', false);
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this.setIsPreviewEnabled(false);
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return this;
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},
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/**
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* Enable the area and start updating to reflect the content editing.
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*/
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enablePreview: function() {
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if (!this.getIsPreviewEnabled()) {
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this.setIsPreviewEnabled(true);
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// Initialise mode.
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if ($.browser.msie && $.browser.version.slice(0,3)<=7) {
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// We do not support the split mode in IE < 8.
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this.changeMode('content');
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} else {
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this.changeMode(this.getDefaultMode(), false);
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}
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}
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return this;
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},
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/**
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* Return a style element we can use in IE8 to fix fonts (see readystatechange binding in onadd below)
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*/
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getOrAppendFontFixStyleElement: function() {
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var style = $('#FontFixStyleElement');
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if (!style.length) {
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style = $(
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'<style type="text/css" id="FontFixStyleElement" disabled="disabled">'+
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':before,:after{content:none !important}'+
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'</style>'
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).appendTo('head');
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}
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return style;
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},
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/**
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* Initialise the preview element.
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*/
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onadd: function() {
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var self = this, layoutContainer = this.parent(), iframe = this.find('iframe');
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// Create layout and controls
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iframe.addClass('center');
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iframe.bind('load', function() {
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self._adjustIframeForPreview();
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// Load edit view for new page, but only if the preview is activated at the moment.
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// This avoids e.g. force-redirections of the edit view on RedirectorPage instances.
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self._loadCurrentPage();
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$(this).removeClass('loading');
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});
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// If there's any webfonts in the preview, IE8 will start glitching. This fixes that.
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if ($.browser.msie && 8 === parseInt($.browser.version, 10)) {
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iframe.bind('readystatechange', function(e) {
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if(iframe[0].readyState == 'interactive') {
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self.getOrAppendFontFixStyleElement().removeAttr('disabled');
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setTimeout(function(){ self.getOrAppendFontFixStyleElement().attr('disabled', 'disabled'); }, 0);
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}
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});
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}
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// Preview might not be available in all admin interfaces - block/disable when necessary
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this.append('<div class="cms-preview-overlay ui-widget-overlay-light"></div>');
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this.find('.cms-preview-overlay').hide();
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this.disablePreview();
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this._super();
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},
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/**
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* Set the preview to unavailable - could be still visible. This is purely visual.
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*/
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_block: function() {
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this.addClass('blocked');
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this.find('.cms-preview-overlay').show();
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return this;
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},
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/**
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* Set the preview to available (remove the overlay);
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*/
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_unblock: function() {
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this.removeClass('blocked');
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this.find('.cms-preview-overlay').hide();
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return this;
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},
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/**
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* Update the preview according to browser and CMS section capabilities.
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*/
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_initialiseFromContent: function() {
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var mode, size;
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if (!$('.cms-previewable').length) {
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this.disablePreview();
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} else {
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mode = this.loadState('mode');
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size = this.loadState('size');
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this._moveNavigator();
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if(!mode || mode != 'content') {
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this.enablePreview();
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this._loadCurrentState();
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}
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this.redraw();
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// now check the cookie to see if we have any preview settings that have been
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// retained for this page from the last visit
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if(mode) this.changeMode(mode);
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if(size) this.changeSize(size);
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}
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return this;
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},
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/**
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* Update preview whenever any panels are reloaded.
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*/
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'from .cms-container': {
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onafterstatechange: function(e, data) {
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// Don't update preview if we're dealing with a custom redirect
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if(data.xhr.getResponseHeader('X-ControllerURL')) return;
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this._initialiseFromContent();
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}
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},
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/** @var string A URL that should be displayed in this preview panel once it becomes visible */
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PendingURL: null,
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oncolumnvisibilitychanged: function() {
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var url = this.getPendingURL();
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if (url && !this.is('.column-hidden')) {
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this.setPendingURL(null);
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this._loadUrl(url);
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this._unblock();
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}
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},
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/**
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* Update preview whenever a form is submitted.
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* This is an alternative to the LeftAndmMain::loadPanel functionality which we already
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* cover in the onafterstatechange handler.
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*/
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'from .cms-container .cms-edit-form': {
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onaftersubmitform: function(){
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this._initialiseFromContent();
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}
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},
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/**
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* Change the URL of the preview iframe (if its not already displayed).
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*/
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_loadUrl: function(url) {
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this.find('iframe').addClass('loading').attr('src', url);
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return this;
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},
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/**
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* Fetch available states from the current SilverStripeNavigator (SilverStripeNavigatorItems).
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* Navigator is supplied by the backend and contains all state options for the current object.
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*/
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_getNavigatorStates: function() {
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// Walk through available states and get the URLs.
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var urlMap = $.map(this.getAllowedStates(), function(name) {
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var stateLink = $('.cms-preview-states .state-name[data-name=' + name + ']');
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if(stateLink.length) {
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return {
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name: name,
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url: stateLink.attr('data-link'),
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active: stateLink.is(':radio') ? stateLink.is(':checked') : stateLink.is(':selected')
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};
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} else {
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return null;
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}
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});
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return urlMap;
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},
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/**
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* Load current state into the preview (e.g. StageLink or LiveLink).
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* We try to reuse the state we have been previously in. Otherwise we fall back
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* to the first state available on the "AllowedStates" list.
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*
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* @returns New state name.
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*/
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_loadCurrentState: function() {
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if (!this.getIsPreviewEnabled()) return this;
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var states = this._getNavigatorStates();
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var currentStateName = this.getCurrentStateName();
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var currentState = null;
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// Find current state within currently available states.
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if (states) {
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currentState = $.grep(states, function(state, index) {
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return (
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currentStateName === state.name ||
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(!currentStateName && state.active)
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);
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});
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}
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var url = null;
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if (currentState[0]) {
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// State is available on the newly loaded content. Get it.
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url = currentState[0].url;
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} else if (states.length) {
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// Fall back to the first available content state.
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this.setCurrentStateName(states[0].name);
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url = states[0].url;
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} else {
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// No state available at all.
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this.setCurrentStateName(null);
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}
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// If this preview panel isn't visible at the moment, delay loading the URL until it (maybe) is later
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if (this.is('.column-hidden')) {
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this.setPendingURL(url);
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this._loadUrl('about:blank');
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this._block();
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}
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else {
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this.setPendingURL(null);
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if (url) {
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this._loadUrl(url);
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this._unblock();
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}
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else {
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this._block();
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}
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}
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return this;
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},
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/**
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* Move the navigator from the content to the preview bar.
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*/
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_moveNavigator: function() {
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var previewEl = $('.cms-preview .cms-preview-controls');
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var navigatorEl = $('.cms-edit-form .cms-navigator');
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if (navigatorEl.length && previewEl.length) {
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// Navigator is available - install the navigator.
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previewEl.html($('.cms-edit-form .cms-navigator').detach());
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} else {
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// Navigator not available.
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this._block();
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}
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},
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/**
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* Loads the matching edit form for a page viewed in the preview iframe,
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* based on metadata sent along with this document.
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*/
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_loadCurrentPage: function() {
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if (!this.getIsPreviewEnabled()) return;
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var doc = this.find('iframe')[0].contentDocument,
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containerEl = $('.cms-container');
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// Load this page in the admin interface if appropriate
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var id = $(doc).find('meta[name=x-page-id]').attr('content');
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var editLink = $(doc).find('meta[name=x-cms-edit-link]').attr('content');
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var contentPanel = $('.cms-content');
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if(id && contentPanel.find(':input[name=ID]').val() != id) {
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// Ignore behaviour without history support (as we need ajax loading
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// for the new form to load in the background)
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if(window.History.enabled)
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$('.cms-container').entwine('.ss').loadPanel(editLink);
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}
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},
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/**
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* Prepare the iframe content for preview.
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*/
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_adjustIframeForPreview: function() {
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var iframe = this.find('iframe')[0];
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if(iframe){
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var doc = iframe.contentDocument;
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}else{
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return;
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}
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if(!doc) return;
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// Open external links in new window to avoid "escaping" the internal page context in the preview
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// iframe, which is important to stay in for the CMS logic.
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var links = doc.getElementsByTagName('A');
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for (var i = 0; i < links.length; i++) {
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var href = links[i].getAttribute('href');
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if(!href) continue;
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if (href.match(/^http:\/\//)) links[i].setAttribute('target', '_blank');
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}
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// Hide the navigator from the preview iframe and use only the CMS one.
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var navi = doc.getElementById('SilverStripeNavigator');
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if(navi) navi.style.display = 'none';
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var naviMsg = doc.getElementById('SilverStripeNavigatorMessage');
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if(naviMsg) naviMsg.style.display = 'none';
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// Trigger extensions.
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this.trigger('afterIframeAdjustedForPreview', [ doc ]);
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}
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});
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$('.cms-edit-form').entwine({
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onadd: function() {
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this._super();
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$('.cms-preview')._initialiseFromContent();
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}
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});
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/**
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* "Preview state" functions.
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* -------------------------------------------------------------------
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*/
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$('.cms-preview-states').entwine({
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/**
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* Change the appearance of the state selector.
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*/
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changeVisibleState: function(state) {
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this.find('input[data-name="'+state+'"]').prop('checked', true);
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}
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});
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$('.cms-preview-states .state-name').entwine({
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/**
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* Reacts to the user changing the state of the preview.
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*/
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onclick: function(e) {
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//Add and remove classes to make switch work ok in old IE
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this.parent().find('.active').removeClass('active');
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this.next('label').addClass('active');
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var targetStateName = $(this).attr('data-name');
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// Reload preview with the selected state.
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$('.cms-preview').changeState(targetStateName);
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}
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});
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/**
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* "Preview mode" functions
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* -------------------------------------------------------------------
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*/
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$('.preview-mode-selector').entwine({
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/**
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* Change the appearance of the mode selector.
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*/
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changeVisibleMode: function(mode) {
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this.find('select')
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.val(mode)
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.trigger('liszt:updated')
|
|
._addIcon();
|
|
}
|
|
});
|
|
|
|
$('.preview-mode-selector select').entwine({
|
|
/**
|
|
* Reacts to the user changing the preview mode.
|
|
*/
|
|
onchange: function(e) {
|
|
this._super(e);
|
|
e.preventDefault();
|
|
|
|
var targetStateName = $(this).val();
|
|
$('.cms-preview').changeMode(targetStateName);
|
|
}
|
|
});
|
|
|
|
|
|
$('.preview-mode-selector .chzn-results li').entwine({
|
|
/**
|
|
* IE8 doesn't support programatic access to onchange event
|
|
* so react on click
|
|
*/
|
|
onclick:function(e){
|
|
if ($.browser.msie) {
|
|
e.preventDefault();
|
|
var index = this.index();
|
|
var targetStateName = this.closest('.preview-mode-selector').find('select option:eq('+index+')').val();
|
|
|
|
//var targetStateName = $(this).val();
|
|
$('.cms-preview').changeMode(targetStateName);
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Adjust the visibility of the preview-mode selector in the CMS part (hidden if preview is visible).
|
|
*/
|
|
$('.cms-preview.column-hidden').entwine({
|
|
onmatch: function() {
|
|
$('#preview-mode-dropdown-in-content').show();
|
|
this._super();
|
|
},
|
|
onunmatch: function() {
|
|
$('#preview-mode-dropdown-in-content').hide();
|
|
this._super();
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Initialise the preview-mode selector in the CMS part (could be hidden if preview is visible).
|
|
*/
|
|
$('#preview-mode-dropdown-in-content').entwine({
|
|
onmatch: function() {
|
|
if ($('.cms-preview').is('.column-hidden')) {
|
|
this.show();
|
|
}
|
|
else {
|
|
this.hide();
|
|
}
|
|
this._super();
|
|
},
|
|
onunmatch: function() {
|
|
this._super();
|
|
}
|
|
});
|
|
|
|
/**
|
|
* "Preview size" functions
|
|
* -------------------------------------------------------------------
|
|
*/
|
|
$('.preview-size-selector').entwine({
|
|
/**
|
|
* Change the appearance of the size selector.
|
|
*/
|
|
changeVisibleSize: function(size) {
|
|
this.find('select')
|
|
.val(size)
|
|
.trigger('liszt:updated')
|
|
._addIcon();
|
|
}
|
|
});
|
|
|
|
$('.preview-size-selector select').entwine({
|
|
/**
|
|
* Trigger change in the preview size.
|
|
*/
|
|
onchange: function(e) {
|
|
e.preventDefault();
|
|
|
|
var targetSizeName = $(this).val();
|
|
$('.cms-preview').changeSize(targetSizeName);
|
|
}
|
|
});
|
|
|
|
|
|
/**
|
|
* "Chosen" plumbing.
|
|
* -------------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* Add a class to the chzn select trigger based on the currently
|
|
* selected option. Update as this changes
|
|
*/
|
|
$('.preview-selector select.preview-dropdown').entwine({
|
|
'onliszt:showing_dropdown': function() {
|
|
this.siblings().find('.chzn-drop').addClass('open')._alignRight();
|
|
},
|
|
|
|
'onliszt:hiding_dropdown': function() {
|
|
this.siblings().find('.chzn-drop').removeClass('open')._removeRightAlign();
|
|
},
|
|
|
|
/**
|
|
* Trigger additional initial icon update when the control is fully loaded.
|
|
* Solves an IE8 timing issue.
|
|
*/
|
|
'onliszt:ready': function() {
|
|
this._super();
|
|
this._addIcon();
|
|
},
|
|
|
|
_addIcon: function(){
|
|
var selected = this.find(':selected');
|
|
var iconClass = selected.attr('data-icon');
|
|
|
|
var target = this.parent().find('.chzn-container a.chzn-single');
|
|
var oldIcon = target.attr('data-icon');
|
|
if(typeof oldIcon !== 'undefined'){
|
|
target.removeClass(oldIcon);
|
|
}
|
|
target.addClass(iconClass);
|
|
target.attr('data-icon', iconClass);
|
|
|
|
return this;
|
|
}
|
|
});
|
|
|
|
$('.preview-selector .chzn-drop').entwine({
|
|
_alignRight: function(){
|
|
var that = this;
|
|
$(this).hide();
|
|
/* Delay so styles applied after chosen applies css
|
|
(the line after we find out the dropdown is open)
|
|
*/
|
|
setTimeout(function(){
|
|
$(that).css({left:'auto', right:0});
|
|
$(that).show();
|
|
}, 100);
|
|
},
|
|
_removeRightAlign:function(){
|
|
$(this).css({right:'auto'});
|
|
}
|
|
|
|
});
|
|
|
|
/*
|
|
* Means of having extra styled data in chzn 'preview-selector' selects
|
|
* When chzn ul is ready, grab data-description from original select.
|
|
* If it exists, append to option and add description class to list item
|
|
*/
|
|
/*
|
|
|
|
Currently buggy (adds dexcription, then re-renders). This may need to
|
|
be done inside chosen. Chosen recommends to do this stuff in the css,
|
|
but that option is inaccessible and untranslatable
|
|
(https://github.com/harvesthq/chosen/issues/399)
|
|
|
|
$('.preview-selector .chzn-drop ul').entwine({
|
|
onmatch: function() {
|
|
this.extraData();
|
|
this._super();
|
|
},
|
|
onunmatch: function() {
|
|
this._super();
|
|
},
|
|
extraData: function(){
|
|
var that = this;
|
|
var options = this.closest('.preview-selector').find('select option');
|
|
|
|
$.each(options, function(index, option){
|
|
var target = $(that).find("li:eq(" + index + ")");
|
|
var description = $(option).attr('data-description');
|
|
if(description != undefined && !$(target).hasClass('description')){
|
|
$(target).append('<span>' + description + '</span>');
|
|
$(target).addClass('description');
|
|
}
|
|
});
|
|
}
|
|
}); */
|
|
|
|
/**
|
|
* Recalculate the preview space to allow for horizontal scrollbar and the preview actions panel
|
|
*/
|
|
$('.preview-scroll').entwine({
|
|
/**
|
|
* Height of the preview actions panel
|
|
*/
|
|
ToolbarSize: 53,
|
|
|
|
_redraw: function() {
|
|
var toolbarSize = this.getToolbarSize();
|
|
|
|
if(window.debug) console.log('redraw', this.attr('class'), this.get(0));
|
|
var previewHeight = (this.height() - toolbarSize);
|
|
this.height(previewHeight);
|
|
},
|
|
|
|
onmatch: function() {
|
|
this._redraw();
|
|
this._super();
|
|
},
|
|
|
|
onunmatch: function() {
|
|
this._super();
|
|
}
|
|
// TODO: Need to recalculate on resize of browser
|
|
|
|
});
|
|
|
|
/**
|
|
* Rotate preview to landscape
|
|
*/
|
|
$('.preview-device-outer').click(function() {
|
|
if(!$('.preview-device-outer').hasClass('rotate')) {
|
|
$('.preview-device-outer').addClass('rotate');
|
|
} else {
|
|
$('.preview-device-outer').removeClass('rotate');
|
|
}
|
|
});
|
|
});
|
|
}(jQuery));
|