MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */

/** <pre>
 * [NOTE: The below Javascript was stolen from https://oldschool.runescape.wiki/w/MediaWiki:Gadget-highlightTable-core.js on 10/28/2020 by User:Falterfire]
 * highlightTable.js
 *
 * Description:
 * Adds highlighting to tables
 *
 * History:
 * - 1.0: Row highlighting                        - Quarenon
 * - 1.1: Update from pengLocations.js v1.0       - Quarenon
 * - 2.0: pengLocations v2.1, Granular cookie     - Saftzie
 * - 2.1: Made compatible with jquery.tablesorter - Cqm
 * - 2.2: Switch to localStorage                  - Cqm
 * - 3.0: Allow cell highlighting                 - mejrs
 *
 * @todo Allow the stored data to be coupled to the table in question. Currently the data is stored
 *       on the page itself, so if any tables are shuffled, the highlighting doesn't follow. For
 *       the same reason tables hosted on other pages are not synchronized.
 */

/**
 * DATA STORAGE STRUCTURE
 * ----------------------
 *
 * In its raw, uncompressed format, the stored data is as follows:
 * {
 *     hashedPageName1: [
 *         [0, 1, 0, 1, 0, 1],
 *         [1, 0, 1, 0, 1, 0],
 *         [0, 0, 0, 0, 0, 0]
 *     ],
 *     hashedPageName2: [
 *         [0, 1, 0, 1, 0, 1],
 *         [1, 0, 1, 0, 1, 0],
 *         [0, 0, 0, 0, 0, 0]
 *     ]
 * }
 *
 * Where `hashedPageNameX` is the value of wgPageName passed through our `hashString` function,
 * the arrays of numbers representing tables on a page (from top to bottom) and the numbers
 * representing whether a row is highlighted or not, depending on if it is 1 or 0 respectively.
 *
 * During compression, these numbers are collected into groups of 6 and converted to base64.
 * For example:
 *
 *   1. [0, 1, 0, 1, 0, 1]
 *   2. 0x010101             (1 + 4 + 16 = 21)
 *   3. BASE_64_URL[21]      (U)
 *
 * Once each table's rows have been compressed into strings, they are concatenated using `.` as a
 * delimiter. The hashed page name (which is guaranteed to be 8 characters long) is then prepended
 * to this string to look something like the following:
 *
 *   XXXXXXXXab.dc.ef
 *
 *
 * The first character of a hashed page name is then used to form the object that is actually
 * stored. As the hashing function uses hexadecimal, this gives us 16 possible characters (0-9A-Z).
 *
 * {
 *     A: ...
 *     B: ...
 *     C: ...
 *     // etc.
 * }
 *
 * The final step of compression is to merge each page's data together under it's respective top
 * level key. this is done by concatenation again, separated by a `!`.
 *
 * The resulting object is then converted to a string and persisted in local storage. When
 * uncompressing data, simply perform the following steps in reverse.
 *
 * For the implementation of this algorithm, see:
 * - `compress`
 * - `parse`
 * - `hashString`
 *
 * Note that while rows could theoretically be compressed further by using all ASCII characters,
 * eventually we'd start using characters outside printable ASCII which makes debugging painful.
 */

/*jshint bitwise:false, camelcase:true, curly:true, eqeqeq:true, es3:false,
    forin:true, immed:true, indent:4, latedef:true, newcap:true,
    noarg:true, noempty:true, nonew:true, plusplus:true, quotmark:single,
    undef:true, unused:true, strict:true, trailing:true,
    browser:true, devel:false, jquery:true,
    onevar:true
*/
mw.loader.using(['oojs-ui-core', 'oojs-ui.styles.icons-interactions']).done(function() {
	(function($, mw) {
	    'use strict';
	
	    var hasLocalStorage = function(){
	        try {
	            localStorage.setItem('test', 'test')
	            localStorage.removeItem('test')
	            return true
	        } catch (e) {
	            return false
	        }
	    }
	
	    // constants
	    var STORAGE_KEY = 'mi:lightTable',
	        TABLE_CLASS = 'lighttable',
	        LIGHT_ON_CLASS = 'highlight-on',
	        MOUSE_OVER_CLASS = 'highlight-over',
	        BASE_64_URL = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_',
	        PAGE_SEPARATOR = '!',
	        TABLE_SEPARATOR = '.',
	        CASTAGNOLI_POLYNOMIAL = 0x04c11db7,
	        UINT32_MAX = 0xffffffff,
	
	        self = {
	            /*
	             * Stores the current uncompressed data for the current page.
	             */
	            data: null,
	
	            /*
	             * Perform initial checks on the page and browser.
	             */
	            init: function() {
	                var $tables = $('table.' + TABLE_CLASS),
	                    hashedPageName = self.hashString(mw.config.get('wgPageName'));
	
	                // check we have some tables to interact with
	                if (!$tables.length) {
	                    return;
	                }
	                // check the browser supports local storage
	                if (!hasLocalStorage()) {
	                    return;
	                }
	
	                self.data = self.load(hashedPageName, $tables.length);
	                self.initTables(hashedPageName, $tables);
	            },
	
	            /*
	             * Initialise table highlighting.
	             *
	             * @param hashedPageName The current page name as a hash.
	             * @param $tables A list of highlightable tables on the current page.
	             */
	            initTables: function(hashedPageName, $tables) {
	                $tables.each(function(tIndex) {
	                    var $this = $(this),
	                        // data cells
	                        $cells = $this.find('td'),
	                        $rows = $this.find('tr:has(td)'),
	                        // don't rely on headers to find number of columns      
	                        // count them dynamically
	                        columns = 1,
	                        tableData = self.data[tIndex],
	                        mode = 'cells';
	
	                    // Switching between either highlighting rows or cells
	                    if (!$this.hasClass('individual')) {
	                        mode = 'rows';
	                        $cells = $rows;
	                    }
	
	                    // initialise rows if necessary
	                    while ($cells.length > tableData.length) {
	                        tableData.push(0);
	                    }
	
	                    // counting the column count
	                    // necessary to determine colspan of reset button
	                    $rows.each(function() {
	                        var $this = $(this);
	                        columns = Math.max(columns, $this.children('th,td').length);
	                    });
	
	                    $cells.each(function(cIndex) {
	                        var $this = $(this),
	                            cellData = tableData[cIndex];
	
	                        // forbid highlighting any cells/rows that have class nohighlight
	                        if (!$this.hasClass('nohighlight')) {
	                            // initialize highlighting based on the cookie
	                            self.setHighlight($this, cellData);
	
	                            // set mouse events
	                            $this
	                                .mouseover(function() {
	                                    self.setHighlight($this, 2);
	                                })
	                                .mouseout(function() {
	                                    self.setHighlight($this, tableData[cIndex]);
	                                })
	                                .click(function(e) {
	                                    // don't toggle highlight when clicking links
	                                    if ((e.target.tagName !== 'A') && (e.target.tagName !== 'IMG')) {
	                                        // 1 -> 0
	                                        // 0 -> 1
	                                        tableData[cIndex] = 1 - tableData[cIndex];
	
	                                        self.setHighlight($this, tableData[cIndex]);
	                                        self.save(hashedPageName);
	                                    }
	                                });
	                        }
	                    });
	
	                    // add a button for reset
	                    var button = new OO.ui.ButtonWidget({
	                        label: 'Clear selection',
	                        icon: 'clear',
	                        title: 'Removes all highlights from the table',
	                        classes: ['ht-reset'] // this class is targeted by other gadgets, be careful removing it
	                    });
	
	
	                    button.$element.click(function() {
	                        $cells.each(function(cIndex) {
	                            tableData[cIndex] = 0;
	                            self.setHighlight($(this), 0);
	                        });
	
	                        self.save(hashedPageName, $tables.length);
	                    });
	
	                    $this.append(
	                        $('<tfoot>')
	                            .append(
	                                $('<tr>')
	                                    .append(
	                                        $('<th>')
	                                            .attr('colspan', columns)
	                                            .append(button.$element)
	                                    )
	                            )
	                    );
	                });
	            },
	
	            /*
	             * Change the cell background color based on mouse events.
	             *
	             * @param $cell The cell element.
	             * @param val The value to control what class to add (if any).
	             *            0 -> light off (no class)
	             *            1 -> light on
	             *            2 -> mouse over
	             */
	            setHighlight: function($cell, val) {
	                $cell.removeClass(MOUSE_OVER_CLASS);
	                $cell.removeClass(LIGHT_ON_CLASS);
	
	                switch (val) {
	                    // light on
	                    case 1:
	                        $cell.addClass(LIGHT_ON_CLASS);
	                        break;
	
	                    // mouse-over
	                    case 2:
	                        $cell.addClass(MOUSE_OVER_CLASS);
	                        break;
	                }
	            },
	
	            /*
	             * Merge the updated data for the current page into the data for other pages into local storage.
	             *
	             * @param hashedPageName A hash of the current page name.
	             */
	            save: function(hashedPageName) {
	                // load the existing data so we know where to save it
	                var curData = localStorage.getItem(STORAGE_KEY),
	                    compressedData;
	
	                if (curData === null) {
	                    curData = {};
	                } else {
	                    curData = JSON.parse(curData);
	                    curData = self.parse(curData);
	                }
	
	                // merge in our updated data and compress it
	                curData[hashedPageName] = self.data;
	                compressedData = self.compress(curData);
	
	                // convert to a string and save to localStorage
	                compressedData = JSON.stringify(compressedData);
	                localStorage.setItem(STORAGE_KEY, compressedData);
	            },
	
	            /*
	             * Compress the entire data set using tha algoritm documented at the top of the page.
	             *
	             * @param data The data to compress.
	             *
	             * @return the compressed data.
	             */
	            compress: function(data) {
	                var ret = {};
	
	                Object.keys(data).forEach(function(hashedPageName) {
	                    var pageData = data[hashedPageName],
	                        pageKey = hashedPageName.charAt(0);
	
	                    if (!ret.hasOwnProperty(pageKey)) {
	                        ret[pageKey] = {};
	                    }
	
	                    ret[pageKey][hashedPageName] = [];
	
	                    pageData.forEach(function(tableData) {
	                        var compressedTableData = '',
	                            i, j, k;
	
	                        for (i = 0; i < Math.ceil(tableData.length / 6); i += 1) {
	                            k = tableData[6 * i];
	
	                            for (j = 1; j < 6; j += 1) {
	                                k = 2 * k + ((6 * i + j < tableData.length) ? tableData[6 * i + j] : 0);
	                            }
	
	                            compressedTableData += BASE_64_URL.charAt(k);
	                        }
	
	                        ret[pageKey][hashedPageName].push(compressedTableData);
	                    });
	
	                    ret[pageKey][hashedPageName] = ret[pageKey][hashedPageName].join(TABLE_SEPARATOR);
	                });
	
	                Object.keys(ret).forEach(function(pageKey) {
	                    var hashKeys = Object.keys(ret[pageKey]),
	                        hashedData = [];
	
	                    hashKeys.forEach(function(key) {
	                        var pageData = ret[pageKey][key];
	                        hashedData.push(key + pageData);
	                    });
	
	                    hashedData = hashedData.join(PAGE_SEPARATOR);
	                    ret[pageKey] = hashedData;
	                });
	
	                return ret;
	            },
	
	            /*
	             * Get the existing data for the current page.
	             *
	             * @param hashedPageName A hash of the current page name.
	             * @param numTables The number of tables on the current page. Used to ensure the loaded
	             *                  data matches the number of tables on the page thus handling cases
	             *                  where tables have been added or removed. This does not check the
	             *                  amount of rows in the given tables.
	             *
	             * @return The data for the current page.
	             */
	            load: function(hashedPageName, numTables) {
	                var data = localStorage.getItem(STORAGE_KEY),
	                    pageData;
	
	                if (data === null) {
	                    pageData = [];
	                } else {
	                    data = JSON.parse(data);
	                    data = self.parse(data);
	
	                    if (data.hasOwnProperty(hashedPageName)) {
	                        pageData = data[hashedPageName];
	                    } else {
	                        pageData = [];
	                    }
	                }
	
	                // if more tables were added
	                // add extra arrays to store the data in
	                // also populates if no existing data was found
	                while (numTables > pageData.length) {
	                    pageData.push([]);
	                }
	
	                // if tables were removed, remove data from the end of the list
	                // as there's no way to tell which was removed
	                while (numTables < pageData.length) {
	                    pageData.pop();
	                }
	
	                return pageData;
	            },
	
	            /*
	             * Parse the compressed data as loaded from local storage using the algorithm desribed
	             * at the top of the page.
	             *
	             * @param data The data to parse.
	             *
	             * @return the parsed data.
	             */
	            parse: function(data) {
	                var ret = {};
	
	                Object.keys(data).forEach(function(pageKey) {
	                    var pageData = data[pageKey].split(PAGE_SEPARATOR);
	
	                    pageData.forEach(function(tableData) {
	                        var hashedPageName = tableData.substr(0, 8);
	
	                        tableData = tableData.substr(8).split(TABLE_SEPARATOR);
	                        ret[hashedPageName] = [];
	
	                        tableData.forEach(function(rowData, index) {
	                            var i, j, k;
	
	                            ret[hashedPageName].push([]);
	
	                            for (i = 0; i < rowData.length; i += 1) {
	                                k = BASE_64_URL.indexOf(rowData.charAt(i));
	
	                                // input validation
	                                if (k < 0) {
	                                    k = 0;
	                                }
	
	                                for (j = 5; j >= 0; j -= 1) {
	                                    ret[hashedPageName][index][6 * i + j] = (k & 0x1);
	                                    k >>= 1;
	                                }
	                            }
	                        });
	                    });
	
	                });
	
	                return ret;
	            },
	
	            /*
	             * Hash a string into a big endian 32 bit hex string. Used to hash page names.
	             *
	             * @param input The string to hash.
	             *
	             * @return the result of the hash.
	             */
	            hashString: function(input) {
	                var ret = 0,
	                    table = [],
	                    i, j, k;
	
	                // guarantee 8-bit chars
	                input = window.unescape(window.encodeURI(input));
	
	                // calculate the crc (cyclic redundancy check) for all 8-bit data
	                // bit-wise operations discard anything left of bit 31
	                for (i = 0; i < 256; i += 1) {
	                    k = (i << 24);
	
	                    for (j = 0; j < 8; j += 1) {
	                        k = (k << 1) ^ ((k >>> 31) * CASTAGNOLI_POLYNOMIAL);
	                    }
	                    table[i] = k;
	                }
	
	                // the actual calculation
	                for (i = 0; i < input.length; i += 1) {
	                    ret = (ret << 8) ^ table[(ret >>> 24) ^ input.charCodeAt(i)];
	                }
	
	                // make negative numbers unsigned
	                if (ret < 0) {
	                    ret += UINT32_MAX;
	                }
	
	                // 32-bit hex string, padded on the left
	                ret = '0000000' + ret.toString(16).toUpperCase();
	                ret = ret.substr(ret.length - 8);
	
	                return ret;
	            }
	        };
	
	    $(self.init);
	
	    /*
	    // sample data for testing the algorithm used
	    var data = {
	        // page1
	        '0FF47C63': [
	            [0, 1, 1, 0, 1, 0],
	            [0, 1, 1, 0, 1, 0, 1, 1, 1],
	            [0, 0, 0, 0, 1, 1, 0, 0]
	        ],
	        // page2
	        '02B75ABA': [
	            [0, 1, 0, 1, 1, 0],
	            [1, 1, 1, 0, 1, 0, 1, 1, 0],
	            [0, 0, 1, 1, 0, 0, 0, 0]
	        ],
	        // page3
	        '0676470D': [
	            [1, 0, 0, 1, 0, 1],
	            [1, 0, 0, 1, 0, 1, 0, 0, 0],
	            [1, 1, 1, 1, 0, 0, 1, 1]
	        ]
	    };
	
	    console.log('input', data);
	
	    var compressedData = self.compress(data);
	    console.log('compressed', compressedData);
	
	    var parsedData = self.parse(compressedData);
	    console.log(parsedData);
	    */

	}(this.jQuery, this.mediaWiki));
});

// </pre>
//[This is the end of the section stolen from https://oldschool.runescape.wiki/w/MediaWiki:Gadget-highlightTable-core.js]

/* Sets the top property for stickyHeader tables */
function setStickyHeaderTop(addObservers) {
	var observer = null;
	if ((addObservers) && (ResizeObserver !== undefined)) {
		observer = new ResizeObserver(
			function(entries) {
				setStickyHeaderTop(false);
			});
	}
	var stickyTables = document.getElementsByClassName('stickyHeader');
	var headStyles = getComputedStyle(document.getElementById('mw-header-container'));
	var headHeight = document.getElementById('mw-header-container').offsetHeight;
	if (headStyles !== undefined && headStyles.position === 'static') {
		headHeight = 0;
	}
	for (var i = 0; i < stickyTables.length; i++) {
		var firstRow = stickyTables[i].getElementsByClassName('headerRow-0');
		var secondRow = stickyTables[i].getElementsByClassName('headerRow-1');
		var firstHeight = 0;
		if (firstRow.length > 0) {
			firstHeight = firstRow[0].offsetHeight;
			if (addObservers) {
				observer.observe(firstRow[0]);
			}
			var firstHeaders = firstRow[0].getElementsByTagName('th');
			for (var j = 0; j < firstHeaders.length; j++) {
				firstHeaders[j].style.top = headHeight + 'px';
			}
			if (secondRow.length > 0) {
				var secondHeaders = secondRow[0].getElementsByTagName('th');
				var secondHeight = headHeight + firstHeight - 1;
				for (var j = 0; j < secondHeaders.length; j++) {
					secondHeaders[j].style.top = secondHeight + 'px';
				}
			}
		}
	}
}

$(document).ready(function () {
	// Table sticky headers
	var elemSticky = document.getElementsByClassName('stickyHeader');
	if (elemSticky.length > 0) {
		// Sticky headers do not function well when Tabber containers/article tags.
		// Therefore identify any stickyHeader tables within these containers 
		//  and remove the stickyHeader class
		var elemArticle = document.getElementsByTagName('article');
		if (elemArticle.length > 0) {
			for (var kS = 0; kS < elemSticky.length; kS++) {
				for (var kA = 0; kA < elemArticle.length; kA++) {
					var eSticky = elemSticky[kS];
					var eArticle = elemArticle[kA];
					if (eArticle.contains(eSticky)) {
						eSticky.classList.remove('stickyHeader');
					}
				}
			}
		}
		// Initialize sticky header positions
		setStickyHeaderTop(true);
		// Reset sticky header positions when the window resizes, as this may
		// affect visibility of fixed elements at the top of the page
		$(window).resize(function() { setStickyHeaderTop(false); });
		// Reset sticky header positions if the offsetHeight attribute changes
		// Without this, headers may have an incorrect offset
		
	}
});