view mercurial/templates/static/mercurial.js @ 24572:b83679eb5f86

manifestv2: add support for reading new manifest format

The new manifest format is designed to be smaller, in particular to
produce smaller deltas. It stores hashes in binary and puts the hash
on a new line (for smaller deltas). It also uses stem compression to
save space for long paths. The format has room for metadata, but
that's there only for future-proofing. The parser thus accepts any
metadata and throws it away. For more information, see
http://mercurial.selenic.com/wiki/ManifestV2Plan.

The current manifest format doesn't allow an empty filename, so we use
an empty filename on the first line to tell a manifest of the new
format from the old. Since we still never write manifests in the new
format, the added code is unused, but it is tested by
test-manifest.py.

// 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.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.overrideMimeType("text/xhtml; charset=" + document.characterSet.toLowerCase());
    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(/^\s*<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();
}