mirror of
https://github.com/Jermolene/TiddlyWiki5
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180 lines
4.7 KiB
JavaScript
180 lines
4.7 KiB
JavaScript
/*\
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title: $:/core/modules/utils/dom/popup.js
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type: application/javascript
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module-type: utils
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Module that creates a $tw.utils.Popup object prototype that manages popups in the browser
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Creates a Popup object with these options:
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rootElement: the DOM element to which the popup zapper should be attached
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*/
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var Popup = function(options) {
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options = options || {};
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this.rootElement = options.rootElement || document.documentElement;
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this.popups = []; // Array of {title:,wiki:,domNode:} objects
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};
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/*
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Trigger a popup open or closed. Parameters are in a hashmap:
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title: title of the tiddler where the popup details are stored
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domNode: dom node to which the popup will be positioned (one of domNode or domNodeRect is required)
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domNodeRect: rectangle to which the popup will be positioned
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wiki: wiki
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force: if specified, forces the popup state to true or false (instead of toggling it)
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floating: if true, skips registering the popup, meaning that it will need manually clearing
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*/
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Popup.prototype.triggerPopup = function(options) {
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// Check if this popup is already active
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var index = this.findPopup(options.title);
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// Compute the new state
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var state = index === -1;
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if(options.force !== undefined) {
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state = options.force;
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}
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// Show or cancel the popup according to the new state
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if(state) {
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this.show(options);
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} else {
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this.cancel(index);
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}
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};
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Popup.prototype.findPopup = function(title) {
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var index = -1;
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for(var t=0; t<this.popups.length; t++) {
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if(this.popups[t].title === title) {
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index = t;
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}
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}
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return index;
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};
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Popup.prototype.handleEvent = function(event) {
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if(event.type === "click") {
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// Find out what was clicked on
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var info = this.popupInfo(event.target),
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cancelLevel = info.popupLevel - 1;
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// Don't remove the level that was clicked on if we clicked on a handle
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if(info.isHandle) {
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cancelLevel++;
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}
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// Cancel
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this.cancel(cancelLevel);
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}
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};
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/*
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Find the popup level containing a DOM node. Returns:
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popupLevel: count of the number of nested popups containing the specified element
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isHandle: true if the specified element is within a popup handle
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*/
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Popup.prototype.popupInfo = function(domNode) {
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var isHandle = false,
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popupCount = 0,
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node = domNode;
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// First check ancestors to see if we're within a popup handle
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while(node) {
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if($tw.utils.hasClass(node,"tc-popup-handle")) {
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isHandle = true;
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popupCount++;
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}
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if($tw.utils.hasClass(node,"tc-popup-keep")) {
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isHandle = true;
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}
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node = node.parentNode;
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}
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// Then count the number of ancestor popups
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node = domNode;
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while(node) {
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if($tw.utils.hasClass(node,"tc-popup")) {
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popupCount++;
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}
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node = node.parentNode;
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}
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var info = {
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popupLevel: popupCount,
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isHandle: isHandle
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};
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return info;
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};
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/*
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Display a popup by adding it to the stack
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*/
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Popup.prototype.show = function(options) {
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// Find out what was clicked on
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var info = this.popupInfo(options.domNode);
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// Cancel any higher level popups
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this.cancel(info.popupLevel);
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// Store the popup details if not already there
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if(!options.floating && this.findPopup(options.title) === -1) {
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this.popups.push({
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title: options.title,
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wiki: options.wiki,
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domNode: options.domNode
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});
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}
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// Set the state tiddler
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var rect;
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if(options.domNodeRect) {
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rect = options.domNodeRect;
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} else {
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rect = {
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left: options.domNode.offsetLeft,
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top: options.domNode.offsetTop,
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width: options.domNode.offsetWidth,
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height: options.domNode.offsetHeight
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};
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}
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var popupRect = "(" + rect.left + "," + rect.top + "," +
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rect.width + "," + rect.height + ")";
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if(options.noStateReference) {
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options.wiki.setText(options.title,"text",undefined,popupRect);
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} else {
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options.wiki.setTextReference(options.title,popupRect);
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}
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// Add the click handler if we have any popups
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if(this.popups.length > 0) {
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this.rootElement.addEventListener("click",this,true);
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}
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};
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/*
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Cancel all popups at or above a specified level or DOM node
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level: popup level to cancel (0 cancels all popups)
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*/
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Popup.prototype.cancel = function(level) {
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var numPopups = this.popups.length;
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level = Math.max(0,Math.min(level,numPopups));
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for(var t=level; t<numPopups; t++) {
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var popup = this.popups.pop();
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if(popup.title) {
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popup.wiki.deleteTiddler(popup.title);
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}
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}
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if(this.popups.length === 0) {
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this.rootElement.removeEventListener("click",this,false);
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}
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};
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/*
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Returns true if the specified title and text identifies an active popup
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*/
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Popup.prototype.readPopupState = function(text) {
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var popupLocationRegExp = /^\((-?[0-9\.E]+),(-?[0-9\.E]+),(-?[0-9\.E]+),(-?[0-9\.E]+)\)$/;
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return popupLocationRegExp.test(text);
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};
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exports.Popup = Popup;
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})();
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