mercurial/templates/static/mercurial.js

web: Made elapsed time calculation dynamic (javascript).

This allow safe caching of the pages by the browser and still display the right
amount of elapsed time upon page refresh.

If javascript is disabled, absolute time is displayed, leaving it readable.

All the templates have been updated.

// mercurial.js - JavaScript utility functions
//
// Rendering of branch DAGs on the client side
// Display of elapsed time
//
// 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 (navigator.userAgent.indexOf('MSIE') >= 0) 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.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.
		//
		// Picks 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.
		
		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);
		var s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
		this.ctx.strokeStyle = s;
		this.ctx.fillStyle = s;
		return s;
		
	}

	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;
			
			for (var j in edges) {
				
				line = edges[j];
				start = line[0];
				end = line[1];
				color = line[2];

				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);
				
			}
			
			// 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;
		
	}

}


process_dates = (function(document, RegExp, Math, isNaN, Date, _false, _true){

	// 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 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 once.getFullYear() + '-' + once.getMonth() + '-' + once.getDate();
		}

		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';
				}
			}
		}
	}

	return function(){
		var nodes = document.getElementsByTagName('*');
		var ageclass = new RegExp('\\bage\\b');
		var dateclass = new RegExp('\\bdate\\b');
		for (var i=0; i<nodes.length; ++i){
			var node = nodes[i];
			var classes = node.className;
			if (ageclass.test(classes)){
				var agevalue = age(node.textContent);
				if (dateclass.test(classes)){
					// We want both: date + (age)
					node.textContent += ' ('+agevalue+')';
				} else {
					node.textContent = agevalue;
				}
			}
		}
	}
})(document, RegExp, Math, isNaN, Date, false, true)