// 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 <scott@ubuntu.com>
// 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.cur = [0, 0];
this.line_width = 3;
this.bg = [0, 4];
this.cell = [2, 0];
this.columns = 0;
this.revlink = '';
this.reset = function() {
this.bg = [0, 4];
this.cell = [2, 0];
this.columns = 0;
document.getElementById('nodebgs').innerHTML = '';
document.getElementById('graphnodes').innerHTML = '';
}
this.scale = function(height) {
this.bg_height = height;
this.box_size = Math.floor(this.bg_height / 1.2);
this.cell_height = this.box_size;
}
function colorPart(num) {
num *= 255
num = num < 0 ? 0 : num;
num = num > 255 ? 255 : num;
var digits = Math.round(num).toString(16);
if (num < 16) {
return '0' + digits;
} else {
return digits;
}
}
this.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;
}
this.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();
}
this.render = function(data) {
var backgrounds = '';
var nodedata = '';
for (var i in data) {
var parity = i % 2;
this.cell[1] += this.bg_height;
this.bg[1] += this.bg_height;
var cur = data[i];
var node = cur[1];
var edges = cur[2];
var fold = false;
var prevWidth = this.ctx.lineWidth;
for (var j in edges) {
line = 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) {
var 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 = node[0]
color = node[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, color, parity, cur);
backgrounds += add[0];
nodedata += add[1];
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 (unit in scales){
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');
for (var 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 (var 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) {
xfr = new XMLHttpRequest();
xfr.onreadystatechange = function() {
if (xfr.readyState === 4) {
try {
if (xfr.status === 200) {
onsuccess(xfr.responseText);
} else {
throw 'server error';
}
} catch (e) {
onerror(e);
} finally {
oncomplete();
}
}
};
xfr.open(method, url);
xfr.send();
onstart();
return xfr;
}
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 ajaxScrollInit(urlFormat,
nextPageVar,
nextPageVarGet,
containerSelector,
messageFormat,
mode) {
updateInitiated = false;
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) {
if (mode == 'graph') {
var addHeight = htmlText.match(/^<canvas id="graph".*height="(\d+)"><\/canvas>$/m)[1];
addHeight = parseInt(addHeight);
graph.canvas.height = addHeight;
var dataStr = htmlText.match(/^\s*var data = (.*);$/m)[1];
var data = JSON.parse(dataStr)
if (data.length < nextPageVar) {
nextPageVar = undefined;
}
graph.reset();
graph.render(data);
} else {
var doc = docFromHTML(htmlText);
var nodes = doc.querySelector(containerSelector).children;
var curClass = 'c' + Date.now();
while (nodes.length) {
var node = nodes[0];
node = document.adoptNode(node);
node.classList.add(curClass);
container.appendChild(node);
}
process_dates('.' + curClass);
}
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();
}
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