hgweb: stop adding strings to innerHTML of #graphnodes and #nodebgs (BC)

There's nothing that uses this functionality anymore, since all HTML is
generated server-side now. Changeset entries are still accessible in JS via
DOM (that's how we set left padding), so it's still possible to do something
unusual by overriding Graph.prototype.vertex().

mercurial/templates/static/mercurial.js

@@ -1,513 +1,503
 // mercurial.js - JavaScript utility functions
 //
 // Rendering of branch DAGs on the client side
 // Display of elapsed time
 // Show or hide diffstat
 //
 // Copyright 2008 Dirkjan Ochtman <dirkjan AT ochtman DOT nl>
 // Copyright 2006 Alexander Schremmer <alex AT alexanderweb DOT de>
 //
 // derived from code written by Scott James Remnant <[e-mail]>
 // Copyright 2005 Canonical Ltd.
 //
 // This software may be used and distributed according to the terms
 // of the GNU General Public License, incorporated herein by reference.
 
 var colors = [
 	[ 1.0, 0.0, 0.0 ],
 	[ 1.0, 1.0, 0.0 ],
 	[ 0.0, 1.0, 0.0 ],
 	[ 0.0, 1.0, 1.0 ],
 	[ 0.0, 0.0, 1.0 ],
 	[ 1.0, 0.0, 1.0 ]
 ];
 
 function Graph() {
 
 	this.canvas = document.getElementById('graph');
 	if (window.G_vmlCanvasManager) this.canvas = window.G_vmlCanvasManager.initElement(this.canvas);
 	this.ctx = this.canvas.getContext('2d');
 	this.ctx.strokeStyle = 'rgb(0, 0, 0)';
 	this.ctx.fillStyle = 'rgb(0, 0, 0)';
 	this.bg = [0, 4];
 	this.cell = [2, 0];
 	this.columns = 0;
 
 }
 
 Graph.prototype = {
 	reset: function() {
 		this.bg = [0, 4];
 		this.cell = [2, 0];
 		this.columns = 0;
-		document.getElementById('nodebgs').innerHTML = '';
 	},
 
 	scale: function(height) {
 		this.bg_height = height;
 		this.box_size = Math.floor(this.bg_height / 1.2);
 		this.cell_height = this.box_size;
 	},
 
 	setColor: function(color, bg, fg) {
 
 		// Set the colour.
 		//
 		// If color is a string, expect an hexadecimal RGB
 		// value and apply it unchanged. If color is a number,
 		// pick a distinct colour based on an internal wheel;
 		// the bg parameter provides the value that should be
 		// assigned to the 'zero' colours and the fg parameter
 		// provides the multiplier that should be applied to
 		// the foreground colours.
 		var s;
 		if(typeof color === "string") {
 			s = "#" + color;
 		} else { //typeof color === "number"
 			color %= colors.length;
 			var red = (colors[color][0] * fg) || bg;
 			var green = (colors[color][1] * fg) || bg;
 			var blue = (colors[color][2] * fg) || bg;
 			red = Math.round(red * 255);
 			green = Math.round(green * 255);
 			blue = Math.round(blue * 255);
 			s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
 		}
 		this.ctx.strokeStyle = s;
 		this.ctx.fillStyle = s;
 		return s;
 
 	},
 
 	edge: function(x0, y0, x1, y1, color, width) {
 
 		this.setColor(color, 0.0, 0.65);
 		if(width >= 0)
 			 this.ctx.lineWidth = width;
 		this.ctx.beginPath();
 		this.ctx.moveTo(x0, y0);
 		this.ctx.lineTo(x1, y1);
 		this.ctx.stroke();
 
 	},
 
 	vertex: function(x, y, radius, color, parity, cur) {
 		this.ctx.beginPath();
 		this.setColor(color, 0.25, 0.75);
 		this.ctx.arc(x, y, radius, 0, Math.PI * 2, true);
 		this.ctx.fill();
 
 		var left = (this.bg_height - this.box_size) + (this.columns + 1) * this.box_size;
 		var item = document.querySelector('[data-node="' + cur.node + '"]');
 		if (item) {
 			item.style.paddingLeft = left + 'px';
 		}
-
-		return ['', ''];
 	},
 
 	render: function(data) {
 
-		var backgrounds = '';
-		var nodedata = '';
 		var i, j, cur, line, start, end, color, x, y, x0, y0, x1, y1, column, radius;
 
 		var cols = 0;
 		for (i = 0; i < data.length; i++) {
 			cur = data[i];
 			for (j = 0; j < cur.edges.length; j++) {
 				line = cur.edges[j];
 				cols = Math.max(cols, line[0], line[1]);
 			}
 		}
 		this.canvas.width = (cols + 1) * this.bg_height;
 		this.canvas.height = (data.length + 1) * this.bg_height - 27;
 
 		for (i = 0; i < data.length; i++) {
 
 			var parity = i % 2;
 			this.cell[1] += this.bg_height;
 			this.bg[1] += this.bg_height;
 
 			cur = data[i];
 			var fold = false;
 
 			var prevWidth = this.ctx.lineWidth;
 			for (j = 0; j < cur.edges.length; j++) {
 
 				line = cur.edges[j];
 				start = line[0];
 				end = line[1];
 				color = line[2];
 				var width = line[3];
 				if(width < 0)
 					 width = prevWidth;
 				var branchcolor = line[4];
 				if(branchcolor)
 					color = branchcolor;
 
 				if (end > this.columns || start > this.columns) {
 					this.columns += 1;
 				}
 
 				if (start === this.columns && start > end) {
 					fold = true;
 				}
 
 				x0 = this.cell[0] + this.box_size * start + this.box_size / 2;
 				y0 = this.bg[1] - this.bg_height / 2;
 				x1 = this.cell[0] + this.box_size * end + this.box_size / 2;
 				y1 = this.bg[1] + this.bg_height / 2;
 
 				this.edge(x0, y0, x1, y1, color, width);
 
 			}
 			this.ctx.lineWidth = prevWidth;
 
 			// Draw the revision node in the right column
 
 			column = cur.vertex[0];
 			color = cur.vertex[1];
 
 			radius = this.box_size / 8;
 			x = this.cell[0] + this.box_size * column + this.box_size / 2;
 			y = this.bg[1] - this.bg_height / 2;
-			var add = this.vertex(x, y, radius, color, parity, cur);
-			backgrounds += add[0];
-			nodedata += add[1];
+			this.vertex(x, y, radius, color, parity, cur);
 
 			if (fold) this.columns -= 1;
 
 		}
 
-		document.getElementById('nodebgs').innerHTML += backgrounds;
-		document.getElementById('graphnodes').innerHTML += nodedata;
-
 	}
 
 };
 
 
 function process_dates(parentSelector){
 
 	// derived from code from mercurial/templatefilter.py
 
 	var scales = {
 		'year':  365 * 24 * 60 * 60,
 		'month':  30 * 24 * 60 * 60,
 		'week':    7 * 24 * 60 * 60,
 		'day':    24 * 60 * 60,
 		'hour':   60 * 60,
 		'minute': 60,
 		'second': 1
 	};
 
 	function format(count, string){
 		var ret = count + ' ' + string;
 		if (count > 1){
 			ret = ret + 's';
 		}
  		return ret;
  	}
 
 	function shortdate(date){
 		var ret = date.getFullYear() + '-';
 		// getMonth() gives a 0-11 result
 		var month = date.getMonth() + 1;
 		if (month <= 9){
 			ret += '0' + month;
 		} else {
 			ret += month;
 		}
 		ret += '-';
 		var day = date.getDate();
 		if (day <= 9){
 			ret += '0' + day;
 		} else {
 			ret += day;
 		}
 		return ret;
 	}
 
  	function age(datestr){
  		var now = new Date();
  		var once = new Date(datestr);
 		if (isNaN(once.getTime())){
 			// parsing error
 			return datestr;
 		}
 
 		var delta = Math.floor((now.getTime() - once.getTime()) / 1000);
 
 		var future = false;
 		if (delta < 0){
 			future = true;
 			delta = -delta;
 			if (delta > (30 * scales.year)){
 				return "in the distant future";
 			}
 		}
 
 		if (delta > (2 * scales.year)){
 			return shortdate(once);
 		}
 
 		for (var unit in scales){
 			if (!scales.hasOwnProperty(unit)) { continue; }
 			var s = scales[unit];
 			var n = Math.floor(delta / s);
 			if ((n >= 2) || (s === 1)){
 				if (future){
 					return format(n, unit) + ' from now';
 				} else {
 					return format(n, unit) + ' ago';
 				}
 			}
 		}
 	}
 
 	var nodes = document.querySelectorAll((parentSelector || '') + ' .age');
 	var dateclass = new RegExp('\\bdate\\b');
 	for (var i=0; i<nodes.length; ++i){
 		var node = nodes[i];
 		var classes = node.className;
 		var agevalue = age(node.textContent);
 		if (dateclass.test(classes)){
 			// We want both: date + (age)
 			node.textContent += ' ('+agevalue+')';
 		} else {
 			node.title = node.textContent;
 			node.textContent = agevalue;
 		}
 	}
 }
 
 function toggleDiffstat() {
     var curdetails = document.getElementById('diffstatdetails').style.display;
     var curexpand = curdetails === 'none' ? 'inline' : 'none';
     document.getElementById('diffstatdetails').style.display = curexpand;
     document.getElementById('diffstatexpand').style.display = curdetails;
 }
 
 function toggleLinewrap() {
     function getLinewrap() {
         var nodes = document.getElementsByClassName('sourcelines');
         // if there are no such nodes, error is thrown here
         return nodes[0].classList.contains('wrap');
     }
 
     function setLinewrap(enable) {
         var nodes = document.getElementsByClassName('sourcelines');
         var i;
         for (i = 0; i < nodes.length; i++) {
             if (enable) {
                 nodes[i].classList.add('wrap');
             } else {
                 nodes[i].classList.remove('wrap');
             }
         }
 
         var links = document.getElementsByClassName('linewraplink');
         for (i = 0; i < links.length; i++) {
             links[i].innerHTML = enable ? 'on' : 'off';
         }
     }
 
     setLinewrap(!getLinewrap());
 }
 
 function format(str, replacements) {
     return str.replace(/%(\w+)%/g, function(match, p1) {
         return String(replacements[p1]);
     });
 }
 
 function makeRequest(url, method, onstart, onsuccess, onerror, oncomplete) {
     var xhr = new XMLHttpRequest();
     xhr.onreadystatechange = function() {
         if (xhr.readyState === 4) {
             try {
                 if (xhr.status === 200) {
                     onsuccess(xhr.responseText);
                 } else {
                     throw 'server error';
                 }
             } catch (e) {
                 onerror(e);
             } finally {
                 oncomplete();
             }
         }
     };
 
     xhr.open(method, url);
     xhr.overrideMimeType("text/xhtml; charset=" + document.characterSet.toLowerCase());
     xhr.send();
     onstart();
     return xhr;
 }
 
 function removeByClassName(className) {
     var nodes = document.getElementsByClassName(className);
     while (nodes.length) {
         nodes[0].parentNode.removeChild(nodes[0]);
     }
 }
 
 function docFromHTML(html) {
     var doc = document.implementation.createHTMLDocument('');
     doc.documentElement.innerHTML = html;
     return doc;
 }
 
 function appendFormatHTML(element, formatStr, replacements) {
     element.insertAdjacentHTML('beforeend', format(formatStr, replacements));
 }
 
 function adoptChildren(from, to) {
     var nodes = from.children;
     var curClass = 'c' + Date.now();
     while (nodes.length) {
         var node = nodes[0];
         node = document.adoptNode(node);
         node.classList.add(curClass);
         to.appendChild(node);
     }
     process_dates('.' + curClass);
 }
 
 function ajaxScrollInit(urlFormat,
                         nextPageVar,
                         nextPageVarGet,
                         containerSelector,
                         messageFormat,
                         mode) {
     var updateInitiated = false;
     var container = document.querySelector(containerSelector);
 
     function scrollHandler() {
         if (updateInitiated) {
             return;
         }
 
         var scrollHeight = document.documentElement.scrollHeight;
         var clientHeight = document.documentElement.clientHeight;
         var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
 
         if (scrollHeight - (scrollTop + clientHeight) < 50) {
             updateInitiated = true;
             removeByClassName('scroll-loading-error');
             container.lastElementChild.classList.add('scroll-separator');
 
             if (!nextPageVar) {
                 var message = {
                     'class': 'scroll-loading-info',
                     text: 'No more entries'
                 };
                 appendFormatHTML(container, messageFormat, message);
                 return;
             }
 
             makeRequest(
                 format(urlFormat, {next: nextPageVar}),
                 'GET',
                 function onstart() {
                     var message = {
                         'class': 'scroll-loading',
                         text: 'Loading...'
                     };
                     appendFormatHTML(container, messageFormat, message);
                 },
                 function onsuccess(htmlText) {
                     var doc = docFromHTML(htmlText);
 
                     if (mode === 'graph') {
                         var graph = window.graph;
                         var dataStr = htmlText.match(/^\s*var data = (.*);$/m)[1];
                         var data = JSON.parse(dataStr);
                         if (data.length < nextPageVar) {
                             nextPageVar = undefined;
                         }
                         graph.reset();
                         adoptChildren(doc.querySelector('#graphnodes'), container.querySelector('#graphnodes'));
                         graph.render(data);
                     } else {
                         adoptChildren(doc.querySelector(containerSelector), container);
                     }
 
                     nextPageVar = nextPageVarGet(htmlText, nextPageVar);
                 },
                 function onerror(errorText) {
                     var message = {
                         'class': 'scroll-loading-error',
                         text: 'Error: ' + errorText
                     };
                     appendFormatHTML(container, messageFormat, message);
                 },
                 function oncomplete() {
                     removeByClassName('scroll-loading');
                     updateInitiated = false;
                     scrollHandler();
                 }
             );
         }
     }
 
     window.addEventListener('scroll', scrollHandler);
     window.addEventListener('resize', scrollHandler);
     scrollHandler();
 }
 
 function renderDiffOptsForm() {
     // We use URLSearchParams for query string manipulation. Old browsers don't
     // support this API.
     if (!("URLSearchParams" in window)) {
         return;
     }
 
     var form = document.getElementById("diffopts-form");
 
     var KEYS = [
         "ignorews",
         "ignorewsamount",
         "ignorewseol",
         "ignoreblanklines",
     ];
 
     var urlParams = new window.URLSearchParams(window.location.search);
 
     function updateAndRefresh(e) {
         var checkbox = e.target;
         var name = checkbox.id.substr(0, checkbox.id.indexOf("-"));
         urlParams.set(name, checkbox.checked ? "1" : "0");
         window.location.search = urlParams.toString();
     }
 
     var allChecked = form.getAttribute("data-ignorews") === "1";
 
     for (var i = 0; i < KEYS.length; i++) {
         var key = KEYS[i];
 
         var checkbox = document.getElementById(key + "-checkbox");
         if (!checkbox) {
             continue;
         }
 
         var currentValue = form.getAttribute("data-" + key);
         checkbox.checked = currentValue !== "0";
 
         // ignorews implies ignorewsamount and ignorewseol.
         if (allChecked && (key === "ignorewsamount" || key === "ignorewseol")) {
             checkbox.checked = true;
             checkbox.disabled = true;
         }
 
         checkbox.addEventListener("change", updateAndRefresh, false);
     }
 
     form.style.display = 'block';
 }
 
 document.addEventListener('DOMContentLoaded', function() {
    process_dates();
 }, false);