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enable lazy-loading of gitgraph.js (#9036) 

- moved gitgraph.js to web_src and made it importable and es6-compatible
- created new webpack chunk for gitgraph
- enabled CSS loader in webpack
- enabled async/await syntax via regenerator-runtime
- added script to ensure webpack chunks are loaded correctly
- disable terser's comment extraction to prevent .LICENCE files

gitgraph.js has many issues:

1. it is incompatible with ES6 because of strict-mode violations
1. it does not export anything
1. it's css has weird styles like for `body`
1. it is not available on npm

I fixed points 1-3 in our version so it's now loadable in webpack. We should eventually consider alternatives.
tags/v1.21.12.1
silverwind Lauris BH 6 years ago
parent
06984bbcbf
commit
f8bd90ba60
23 changed files with 1334 additions and 676 deletions
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  1. +1
    -0
      .eslintignore
  2. +1
    -0
      .eslintrc
  3. +847
    -200
      package-lock.json
  4. +4
    -0
      package.json
  5. +2
    -0
      public/js/gitgraph.js
  6. +1
    -0
      public/js/gitgraph.js.map
  7. +1
    -1
      public/js/index.js
  8. +1
    -1
      public/js/index.js.map
  9. +0
    -3
      public/vendor/VERSIONS
  10. +1
    -1
      public/vendor/librejs.html
  11. +0
    -435
      public/vendor/plugins/gitgraph/gitgraph.js
  12. +0
    -1
      routers/repo/commit.go
  13. +0
    -4
      templates/base/footer.tmpl
  14. +0
    -5
      templates/base/head.tmpl
  15. +1
    -2
      templates/pwa/serviceworker_js.tmpl
  16. +0
    -15
      web_src/js/draw.js
  17. +16
    -0
      web_src/js/gitGraph.js
  18. +3
    -0
      web_src/js/index.js
  19. +12
    -0
      web_src/js/publicPath.js
  20. +0
    -0
      web_src/vendor/gitgraph.js/LICENSE
  21. +1
    -4
      web_src/vendor/gitgraph.js/gitgraph.custom.css
  22. +419
    -0
      web_src/vendor/gitgraph.js/gitgraph.custom.js
  23. +23
    -4
      webpack.config.js

+ 1
- 0
.eslintignore View File

@@ -1 +1,2 @@
/public/js/semantic.dropdown.custom.js
/web_src/js/vendor/**

+ 1
- 0
.eslintrc View File

@@ -14,6 +14,7 @@ env:
node: true

globals:
__webpack_public_path__: true
Clipboard: false
CodeMirror: false
Dropzone: false


+ 847
- 200
package-lock.json
File diff suppressed because it is too large
View File


+ 4
- 0
package.json View File

@@ -6,16 +6,20 @@
},
"devDependencies": {
"@babel/core": "7.7.2",
"@babel/plugin-transform-runtime": "7.6.2",
"@babel/preset-env": "7.7.1",
"@babel/runtime": "7.7.2",
"autoprefixer": "9.7.1",
"babel-loader": "8.0.6",
"core-js": "3.4.1",
"css-loader": "3.2.0",
"eslint": "6.6.0",
"eslint-config-airbnb-base": "14.0.0",
"eslint-plugin-import": "2.18.2",
"less": "3.10.3",
"less-plugin-clean-css": "1.5.1",
"postcss-cli": "6.1.3",
"style-loader": "1.0.0",
"stylelint": "11.1.1",
"stylelint-config-standard": "19.0.0",
"terser-webpack-plugin": "2.2.1",


+ 2
- 0
public/js/gitgraph.js
File diff suppressed because it is too large
View File


+ 1
- 0
public/js/gitgraph.js.map
File diff suppressed because it is too large
View File


+ 1
- 1
public/js/index.js
File diff suppressed because it is too large
View File


+ 1
- 1
public/js/index.js.map
File diff suppressed because it is too large
View File


+ 0
- 3
public/vendor/VERSIONS View File

@@ -17,9 +17,6 @@ Version: 2.3.1
File(s): /vendor/plugins/clipboard/clipboard.min.js
Version: 1.5.9

File(s): /vendor/plugins/gitgraph/gitgraph.js
Version: 745f604212e2abfe2f0a59169ea530857b46625c

File(s): /vendor/plugins/vue/vue.min.js
Version: 2.1.10



+ 1
- 1
public/vendor/librejs.html View File

@@ -46,7 +46,7 @@
<td><a href="https://github.com/zenorocha/clipboard.js/archive/v1.5.9.tar.gz">clipboard-1.5.9.tar.gz</a></td>
</tr>
<tr>
<td><a href="./plugins/gitgraph/gitgraph.js">gitgraph.js</a></td>
<td><a href="../js/gitgraph.js">gitgraph.js</a></td>
<td><a href="https://github.com/bluef/gitgraph.js/blob/master/LICENSE">BSD 3-Clause</a></td>
<td><a href="https://github.com/bluef/gitgraph.js">gitgraph.js-latest</a></td>
</tr>


+ 0
- 435
public/vendor/plugins/gitgraph/gitgraph.js View File

@@ -1,435 +0,0 @@
/*
* @license magnet:?xt=urn:btih:c80d50af7d3db9be66a4d0a86db0286e4fd33292&dn=bsd-3-clause.txt BSD 3-Clause
* Copyright (c) 2011, Terrence Lee <kill889@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

var gitGraph = function (canvas, rawGraphList, config) {
if (!canvas.getContext) {
return;
}
if (typeof config === "undefined") {
config = {
unitSize: 20,
lineWidth: 3,
nodeRadius: 4
};
}
var flows = [];
var graphList = [];
var ctx = canvas.getContext("2d");
var devicePixelRatio = window.devicePixelRatio || 1;
var backingStoreRatio = ctx.webkitBackingStorePixelRatio ||
ctx.mozBackingStorePixelRatio ||
ctx.msBackingStorePixelRatio ||
ctx.oBackingStorePixelRatio ||
ctx.backingStorePixelRatio || 1;

var ratio = devicePixelRatio / backingStoreRatio;

var init = function () {
var maxWidth = 0;
var i;
var l = rawGraphList.length;
var row;
var midStr;
for (i = 0; i < l; i++) {
midStr = rawGraphList[i].replace(/\s+/g, " ").replace(/^\s+|\s+$/g, "");
maxWidth = Math.max(midStr.replace(/(\_|\s)/g, "").length, maxWidth);
row = midStr.split("");
graphList.unshift(row);
}
var width = maxWidth * config.unitSize;
var height = graphList.length * config.unitSize;

canvas.width = width * ratio;
canvas.height = height * ratio;

canvas.style.width = width + 'px';
canvas.style.height = height + 'px';
ctx.lineWidth = config.lineWidth;
ctx.lineJoin = "round";
ctx.lineCap = "round";

ctx.scale(ratio, ratio);
};
var genRandomStr = function () {
var chars = "0123456789ABCDEF";
var stringLength = 6;
var randomString = '', rnum, i;
for (i = 0; i < stringLength; i++) {
rnum = Math.floor(Math.random() * chars.length);
randomString += chars.substring(rnum, rnum + 1);
}
return randomString;
};
var findFlow = function (id) {
var i = flows.length;
while (i-- && flows[i].id !== id) {}
return i;
};
var findColomn = function (symbol, row) {
var i = row.length;
while (i-- && row[i] !== symbol) {}
return i;
};
var findBranchOut = function (row) {
if (!row) {
return -1
}
var i = row.length;
while (i-- &&
!(row[i - 1] && row[i] === "/" && row[i - 1] === "|") &&
!(row[i - 2] && row[i] === "_" && row[i - 2] === "|")) {}
return i;
};
var findLineBreak = function (row) {
if (!row) {
return -1
}
var i = row.length;
while (i-- &&
!(row[i - 1] && row[i - 2] && row[i] === " " && row[i - 1] === "|" && row[i - 2] === "_")) {}
return i;
};
var genNewFlow = function () {
var newId;
do {
newId = genRandomStr();
} while (findFlow(newId) !== -1);
return {id:newId, color:"#" + newId};
};
//Draw methods
var drawLine = function (moveX, moveY, lineX, lineY, color) {
ctx.strokeStyle = color;
ctx.beginPath();
ctx.moveTo(moveX, moveY);
ctx.lineTo(lineX, lineY);
ctx.stroke();
};
var drawLineRight = function (x, y, color) {
drawLine(x, y + config.unitSize / 2, x + config.unitSize, y + config.unitSize / 2, color);
};
var drawLineUp = function (x, y, color) {
drawLine(x, y + config.unitSize / 2, x, y - config.unitSize / 2, color);
};
var drawNode = function (x, y, color) {
ctx.strokeStyle = color;
drawLineUp(x, y, color);
ctx.beginPath();
ctx.arc(x, y, config.nodeRadius, 0, Math.PI * 2, true);
ctx.fill();
};
var drawLineIn = function (x, y, color) {
drawLine(x + config.unitSize, y + config.unitSize / 2, x, y - config.unitSize / 2, color);
};
var drawLineOut = function (x, y, color) {
drawLine(x, y + config.unitSize / 2, x + config.unitSize, y - config.unitSize / 2, color);
};
var draw = function (graphList) {
var colomn, colomnIndex, prevColomn, condenseIndex, breakIndex = -1;
var x, y;
var color;
var nodePos;
var tempFlow;
var prevRowLength = 0;
var flowSwapPos = -1;
var lastLinePos;
var i, l;
var condenseCurrentLength, condensePrevLength = 0, condenseNextLength = 0;
var inlineIntersect = false;
//initiate color array for first row
for (i = 0, l = graphList[0].length; i < l; i++) {
if (graphList[0][i] !== "_" && graphList[0][i] !== " ") {
flows.push(genNewFlow());
}
}
y = (canvas.height / ratio) - config.unitSize * 0.5;
//iterate
for (i = 0, l = graphList.length; i < l; i++) {
x = config.unitSize * 0.5;
currentRow = graphList[i];
nextRow = graphList[i + 1];
prevRow = graphList[i - 1];
flowSwapPos = -1;
condenseCurrentLength = currentRow.filter(function (val) {
return (val !== " " && val !== "_")
}).length;
if (nextRow) {
condenseNextLength = nextRow.filter(function (val) {
return (val !== " " && val !== "_")
}).length;
} else {
condenseNextLength = 0;
}
//pre process begin
//use last row for analysing
if (prevRow) {
if (!inlineIntersect) {
//intersect might happen
for (colomnIndex = 0; colomnIndex < prevRowLength; colomnIndex++) {
if (prevRow[colomnIndex + 1] &&
(prevRow[colomnIndex] === "/" && prevRow[colomnIndex + 1] === "|") ||
((prevRow[colomnIndex] === "_" && prevRow[colomnIndex + 1] === "|") &&
(prevRow[colomnIndex + 2] === "/"))) {
flowSwapPos = colomnIndex;
//swap two flow
tempFlow = {id:flows[flowSwapPos].id, color:flows[flowSwapPos].color};
flows[flowSwapPos].id = flows[flowSwapPos + 1].id;
flows[flowSwapPos].color = flows[flowSwapPos + 1].color;
flows[flowSwapPos + 1].id = tempFlow.id;
flows[flowSwapPos + 1].color = tempFlow.color;
}
}
}
if (condensePrevLength < condenseCurrentLength &&
((nodePos = findColomn("*", currentRow)) !== -1 &&
(findColomn("_", currentRow) === -1))) {
flows.splice(nodePos - 1, 0, genNewFlow());
}
if (prevRowLength > currentRow.length &&
(nodePos = findColomn("*", prevRow)) !== -1) {
if (findColomn("_", currentRow) === -1 &&
findColomn("/", currentRow) === -1 &&
findColomn("\\", currentRow) === -1) {
flows.splice(nodePos + 1, 1);
}
}
} //done with the previous row
prevRowLength = currentRow.length; //store for next round
colomnIndex = 0; //reset index
condenseIndex = 0;
condensePrevLength = 0;
breakIndex = -1; //reset break index
while (colomnIndex < currentRow.length) {
colomn = currentRow[colomnIndex];
if (colomn !== " " && colomn !== "_") {
++condensePrevLength;
}
//check and fix line break in next row
if (colomn === "/" && currentRow[colomnIndex - 1] && currentRow[colomnIndex - 1] === "|") {
if ((breakIndex = findLineBreak(nextRow)) !== -1) {
nextRow.splice(breakIndex, 1);
}
}
//if line break found replace all '/' with '|' after breakIndex in previous row
if (breakIndex !== - 1 && colomn === "/" && colomnIndex > breakIndex) {
currentRow[colomnIndex] = "|";
colomn = "|";
}
if (colomn === " " &&
currentRow[colomnIndex + 1] &&
currentRow[colomnIndex + 1] === "_" &&
currentRow[colomnIndex - 1] &&
currentRow[colomnIndex - 1] === "|") {
currentRow.splice(colomnIndex, 1);
currentRow[colomnIndex] = "/";
colomn = "/";
}
//create new flow only when no intersect happened
if (flowSwapPos === -1 &&
colomn === "/" &&
currentRow[colomnIndex - 1] &&
currentRow[colomnIndex - 1] === "|") {
flows.splice(condenseIndex, 0, genNewFlow());
}
//change \ and / to | when it's in the last position of the whole row
if (colomn === "/" || colomn === "\\") {
if (!(colomn === "/" && findBranchOut(nextRow) === -1)) {
if ((lastLinePos = Math.max(findColomn("|", currentRow),
findColomn("*", currentRow))) !== -1 &&
(lastLinePos < colomnIndex - 1)) {
while (currentRow[++lastLinePos] === " ") {}
if (lastLinePos === colomnIndex) {
currentRow[colomnIndex] = "|";
}
}
}
}
if (colomn === "*" &&
prevRow &&
prevRow[condenseIndex + 1] === "\\") {
flows.splice(condenseIndex + 1, 1);
}
if (colomn !== " ") {
++condenseIndex;
}
++colomnIndex;
}
condenseCurrentLength = currentRow.filter(function (val) {
return (val !== " " && val !== "_")
}).length;
//do some clean up
if (flows.length > condenseCurrentLength) {
flows.splice(condenseCurrentLength, flows.length - condenseCurrentLength);
}
colomnIndex = 0;
//a little inline analysis and draw process
while (colomnIndex < currentRow.length) {
colomn = currentRow[colomnIndex];
prevColomn = currentRow[colomnIndex - 1];
if (currentRow[colomnIndex] === " ") {
currentRow.splice(colomnIndex, 1);
x += config.unitSize;
continue;
}
//inline interset
if ((colomn === "_" || colomn === "/") &&
currentRow[colomnIndex - 1] === "|" &&
currentRow[colomnIndex - 2] === "_") {
inlineIntersect = true;
tempFlow = flows.splice(colomnIndex - 2, 1)[0];
flows.splice(colomnIndex - 1, 0, tempFlow);
currentRow.splice(colomnIndex - 2, 1);
colomnIndex = colomnIndex - 1;
} else {
inlineIntersect = false;
}
color = flows[colomnIndex].color;
switch (colomn) {
case "_" :
drawLineRight(x, y, color);
x += config.unitSize;
break;
case "*" :
drawNode(x, y, color);
break;
case "|" :
drawLineUp(x, y, color);
break;
case "/" :
if (prevColomn &&
(prevColomn === "/" ||
prevColomn === " ")) {
x -= config.unitSize;
}
drawLineOut(x, y, color);
x += config.unitSize;
break;
case "\\" :
drawLineIn(x, y, color);
break;
}
++colomnIndex;
}
y -= config.unitSize;
}
};
init();
draw(graphList);
};
// @end-license

+ 0
- 1
routers/repo/commit.go View File

@@ -111,7 +111,6 @@ func Graph(ctx *context.Context) {
ctx.Data["Reponame"] = ctx.Repo.Repository.Name
ctx.Data["CommitCount"] = commitsCount
ctx.Data["Branch"] = ctx.Repo.BranchName
ctx.Data["RequireGitGraph"] = true
ctx.Data["Page"] = context.NewPagination(int(allCommitsCount), setting.UI.GraphMaxCommitNum, page, 5)
ctx.HTML(200, tplGraph)
}


+ 0
- 4
templates/base/footer.tmpl View File

@@ -23,10 +23,6 @@
CodeMirror.modeURL = "{{StaticUrlPrefix}}/vendor/plugins/codemirror/mode/%N/%N.js";
</script>
{{end}}
{{if .RequireGitGraph}}
<!-- graph -->
<script src="{{StaticUrlPrefix}}/vendor/plugins/gitgraph/gitgraph.js"></script>
{{end}}

<!-- Third-party libraries -->
{{if .RequireHighlightJS}}


+ 0
- 5
templates/base/head.tmpl View File

@@ -87,11 +87,6 @@
<link rel="stylesheet" href="{{StaticUrlPrefix}}/vendor/plugins/simplemde/simplemde.min.css">
{{end}}

{{if .RequireGitGraph}}
<!-- graph -->
<link rel="stylesheet" href="{{StaticUrlPrefix}}/vendor/plugins/gitgraph/gitgraph.css">
{{end}}

{{if .RequireTribute}}
<link rel="stylesheet" href="{{StaticUrlPrefix}}/vendor/plugins/tribute/tribute.css">
{{end}}


+ 1
- 2
templates/pwa/serviceworker_js.tmpl View File

@@ -6,9 +6,9 @@ var urlsToCache = [
'{{StaticUrlPrefix}}/vendor/plugins/jquery-migrate/jquery-migrate.min.js?v=3.0.1',
'{{StaticUrlPrefix}}/vendor/plugins/semantic/semantic.min.js',
'{{StaticUrlPrefix}}/js/index.js?v={{MD5 AppVer}}',
'{{StaticUrlPrefix}}/js/gitgraph.js?v={{MD5 AppVer}}',
'{{StaticUrlPrefix}}/js/semantic.dropdown.custom.js?v={{MD5 AppVer}}',
'{{StaticUrlPrefix}}/vendor/plugins/clipboard/clipboard.min.js',
'{{StaticUrlPrefix}}/vendor/plugins/gitgraph/gitgraph.js',
'{{StaticUrlPrefix}}/vendor/plugins/vue/vue.min.js',
'{{StaticUrlPrefix}}/vendor/plugins/emojify/emojify.custom.js',
'{{StaticUrlPrefix}}/vendor/plugins/cssrelpreload/loadCSS.min.js',
@@ -25,7 +25,6 @@ var urlsToCache = [
'{{StaticUrlPrefix}}/vendor/assets/font-awesome/css/font-awesome.min.css',
'{{StaticUrlPrefix}}/vendor/assets/octicons/octicons.min.css',
'{{StaticUrlPrefix}}/vendor/plugins/simplemde/simplemde.min.css',
'{{StaticUrlPrefix}}/vendor/plugins/gitgraph/gitgraph.css',
'{{StaticUrlPrefix}}/vendor/plugins/tribute/tribute.css',
'{{StaticUrlPrefix}}/vendor/plugins/semantic/semantic.min.css',
'{{StaticUrlPrefix}}/css/index.css?v={{MD5 AppVer}}',


+ 0
- 15
web_src/js/draw.js View File

@@ -1,15 +0,0 @@
/* globals gitGraph */

$(() => {
const graphList = [];

if (!document.getElementById('graph-canvas')) {
return;
}

$('#graph-raw-list li span.node-relation').each(function () {
graphList.push($(this).text());
});

gitGraph(document.getElementById('graph-canvas'), graphList);
});

+ 16
- 0
web_src/js/gitGraph.js View File

@@ -0,0 +1,16 @@
$(async () => {
const graphCanvas = document.getElementById('graph-canvas');
if (!graphCanvas) return;

const [{ default: gitGraph }] = await Promise.all([
import(/* webpackChunkName: "gitgraph" */'../vendor/gitgraph.js/gitgraph.custom.js'),
import(/* webpackChunkName: "gitgraph" */'../vendor/gitgraph.js/gitgraph.custom.css'),
]);

const graphList = [];
$('#graph-raw-list li span.node-relation').each(function () {
graphList.push($(this).text());
});

gitGraph(graphCanvas, graphList);
});

+ 3
- 0
web_src/js/index.js View File

@@ -2,6 +2,9 @@
/* exported timeAddManual, toggleStopwatch, cancelStopwatch, initHeatmap */
/* exported toggleDeadlineForm, setDeadline, updateDeadline, deleteDependencyModal, cancelCodeComment, onOAuthLoginClick */

import './publicPath';
import './gitGraph';

function htmlEncode(text) {
return jQuery('<div />').text(text).html();
}


+ 12
- 0
web_src/js/publicPath.js View File

@@ -0,0 +1,12 @@
/* This sets up webpack's chunk loading to load resources from the same
directory where it loaded index.js from. This file must be imported
before any lazy-loading is being attempted. */

if (document.currentScript && document.currentScript.src) {
const url = new URL(document.currentScript.src);
__webpack_public_path__ = `${url.pathname.replace(/\/[^/]*$/, '')}/`;
} else {
// compat: IE11
const script = document.querySelector('script[src*="/index.js"]');
__webpack_public_path__ = `${script.getAttribute('src').replace(/\/[^/]*$/, '')}/`;
}

public/vendor/plugins/gitgraph/LICENSE → web_src/vendor/gitgraph.js/LICENSE View File


public/vendor/plugins/gitgraph/gitgraph.css → web_src/vendor/gitgraph.js/gitgraph.custom.css View File

@@ -1,6 +1,3 @@
body {font:13.34px/1.4 helvetica,arial,freesans,clean,sans-serif;}
em {font-style:normal;}

#git-graph-container, #rel-container {float:left;}
#rel-container {max-width:30%; overflow-x:auto;}
#git-graph-container {overflow-x:auto; width:100%}
@@ -13,4 +10,4 @@ em {font-style:normal;}
#git-graph-container li a em {color:#BB0000;border-bottom:1px dotted #BBBBBB;text-decoration:none;font-style:normal;}
#rev-container {width:100%}
#rev-list {margin:0;padding:0 5px 0 5px;min-width:95%}
#graph-raw-list {margin:0px;}
#graph-raw-list {margin:0px;}

+ 419
- 0
web_src/vendor/gitgraph.js/gitgraph.custom.js View File

@@ -0,0 +1,419 @@
/*
* @license magnet:?xt=urn:btih:c80d50af7d3db9be66a4d0a86db0286e4fd33292&dn=bsd-3-clause.txt BSD 3-Clause
* Copyright (c) 2011, Terrence Lee <kill889@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

export default function gitGraph(canvas, rawGraphList, config) {
if (!canvas.getContext) {
return;
}

if (typeof config === 'undefined') {
config = {
unitSize: 20,
lineWidth: 3,
nodeRadius: 4
};
}

const flows = [];
const graphList = [];

const ctx = canvas.getContext('2d');

const devicePixelRatio = window.devicePixelRatio || 1;
const backingStoreRatio = ctx.webkitBackingStorePixelRatio
|| ctx.mozBackingStorePixelRatio
|| ctx.msBackingStorePixelRatio
|| ctx.oBackingStorePixelRatio
|| ctx.backingStorePixelRatio || 1;

const ratio = devicePixelRatio / backingStoreRatio;

const init = function () {
let maxWidth = 0;
let i;
const l = rawGraphList.length;
let row;
let midStr;

for (i = 0; i < l; i++) {
midStr = rawGraphList[i].replace(/\s+/g, ' ').replace(/^\s+|\s+$/g, '');

maxWidth = Math.max(midStr.replace(/(_|\s)/g, '').length, maxWidth);

row = midStr.split('');

graphList.unshift(row);
}

const width = maxWidth * config.unitSize;
const height = graphList.length * config.unitSize;

canvas.width = width * ratio;
canvas.height = height * ratio;

canvas.style.width = `${width}px`;
canvas.style.height = `${height}px`;

ctx.lineWidth = config.lineWidth;
ctx.lineJoin = 'round';
ctx.lineCap = 'round';

ctx.scale(ratio, ratio);
};

const genRandomStr = function () {
const chars = '0123456789ABCDEF';
const stringLength = 6;
let randomString = '', rnum, i;
for (i = 0; i < stringLength; i++) {
rnum = Math.floor(Math.random() * chars.length);
randomString += chars.substring(rnum, rnum + 1);
}

return randomString;
};

const findFlow = function (id) {
let i = flows.length;

while (i-- && flows[i].id !== id);

return i;
};

const findColomn = function (symbol, row) {
let i = row.length;

while (i-- && row[i] !== symbol);

return i;
};

const findBranchOut = function (row) {
if (!row) {
return -1;
}

let i = row.length;

while (i--
&& !(row[i - 1] && row[i] === '/' && row[i - 1] === '|')
&& !(row[i - 2] && row[i] === '_' && row[i - 2] === '|'));

return i;
};

const findLineBreak = function (row) {
if (!row) {
return -1;
}

let i = row.length;

while (i--
&& !(row[i - 1] && row[i - 2] && row[i] === ' ' && row[i - 1] === '|' && row[i - 2] === '_'));

return i;
};

const genNewFlow = function () {
let newId;

do {
newId = genRandomStr();
} while (findFlow(newId) !== -1);

return { id: newId, color: `#${newId}` };
};

// Draw methods
const drawLine = function (moveX, moveY, lineX, lineY, color) {
ctx.strokeStyle = color;
ctx.beginPath();
ctx.moveTo(moveX, moveY);
ctx.lineTo(lineX, lineY);
ctx.stroke();
};

const drawLineRight = function (x, y, color) {
drawLine(x, y + config.unitSize / 2, x + config.unitSize, y + config.unitSize / 2, color);
};

const drawLineUp = function (x, y, color) {
drawLine(x, y + config.unitSize / 2, x, y - config.unitSize / 2, color);
};

const drawNode = function (x, y, color) {
ctx.strokeStyle = color;

drawLineUp(x, y, color);

ctx.beginPath();
ctx.arc(x, y, config.nodeRadius, 0, Math.PI * 2, true);
ctx.fill();
};

const drawLineIn = function (x, y, color) {
drawLine(x + config.unitSize, y + config.unitSize / 2, x, y - config.unitSize / 2, color);
};

const drawLineOut = function (x, y, color) {
drawLine(x, y + config.unitSize / 2, x + config.unitSize, y - config.unitSize / 2, color);
};

const draw = function (graphList) {
let colomn, colomnIndex, prevColomn, condenseIndex, breakIndex = -1;
let x, y;
let color;
let nodePos;
let tempFlow;
let prevRowLength = 0;
let flowSwapPos = -1;
let lastLinePos;
let i, l;
let condenseCurrentLength, condensePrevLength = 0;

let inlineIntersect = false;

// initiate color array for first row
for (i = 0, l = graphList[0].length; i < l; i++) {
if (graphList[0][i] !== '_' && graphList[0][i] !== ' ') {
flows.push(genNewFlow());
}
}

y = (canvas.height / ratio) - config.unitSize * 0.5;

// iterate
for (i = 0, l = graphList.length; i < l; i++) {
x = config.unitSize * 0.5;

const currentRow = graphList[i];
const nextRow = graphList[i + 1];
const prevRow = graphList[i - 1];

flowSwapPos = -1;

condenseCurrentLength = currentRow.filter((val) => {
return (val !== ' ' && val !== '_');
}).length;

// pre process begin
// use last row for analysing
if (prevRow) {
if (!inlineIntersect) {
// intersect might happen
for (colomnIndex = 0; colomnIndex < prevRowLength; colomnIndex++) {
if (prevRow[colomnIndex + 1]
&& (prevRow[colomnIndex] === '/' && prevRow[colomnIndex + 1] === '|')
|| ((prevRow[colomnIndex] === '_' && prevRow[colomnIndex + 1] === '|')
&& (prevRow[colomnIndex + 2] === '/'))) {
flowSwapPos = colomnIndex;

// swap two flow
tempFlow = { id: flows[flowSwapPos].id, color: flows[flowSwapPos].color };

flows[flowSwapPos].id = flows[flowSwapPos + 1].id;
flows[flowSwapPos].color = flows[flowSwapPos + 1].color;

flows[flowSwapPos + 1].id = tempFlow.id;
flows[flowSwapPos + 1].color = tempFlow.color;
}
}
}

if (condensePrevLength < condenseCurrentLength
&& ((nodePos = findColomn('*', currentRow)) !== -1
&& (findColomn('_', currentRow) === -1))) {
flows.splice(nodePos - 1, 0, genNewFlow());
}

if (prevRowLength > currentRow.length
&& (nodePos = findColomn('*', prevRow)) !== -1) {
if (findColomn('_', currentRow) === -1
&& findColomn('/', currentRow) === -1
&& findColomn('\\', currentRow) === -1) {
flows.splice(nodePos + 1, 1);
}
}
} // done with the previous row

prevRowLength = currentRow.length; // store for next round
colomnIndex = 0; // reset index
condenseIndex = 0;
condensePrevLength = 0;
breakIndex = -1; // reset break index
while (colomnIndex < currentRow.length) {
colomn = currentRow[colomnIndex];

if (colomn !== ' ' && colomn !== '_') {
++condensePrevLength;
}

// check and fix line break in next row
if (colomn === '/' && currentRow[colomnIndex - 1] && currentRow[colomnIndex - 1] === '|') {
if ((breakIndex = findLineBreak(nextRow)) !== -1) {
nextRow.splice(breakIndex, 1);
}
}
// if line break found replace all '/' with '|' after breakIndex in previous row
if (breakIndex !== -1 && colomn === '/' && colomnIndex > breakIndex) {
currentRow[colomnIndex] = '|';
colomn = '|';
}

if (colomn === ' '
&& currentRow[colomnIndex + 1]
&& currentRow[colomnIndex + 1] === '_'
&& currentRow[colomnIndex - 1]
&& currentRow[colomnIndex - 1] === '|') {
currentRow.splice(colomnIndex, 1);

currentRow[colomnIndex] = '/';
colomn = '/';
}

// create new flow only when no intersect happened
if (flowSwapPos === -1
&& colomn === '/'
&& currentRow[colomnIndex - 1]
&& currentRow[colomnIndex - 1] === '|') {
flows.splice(condenseIndex, 0, genNewFlow());
}

// change \ and / to | when it's in the last position of the whole row
if (colomn === '/' || colomn === '\\') {
if (!(colomn === '/' && findBranchOut(nextRow) === -1)) {
if ((lastLinePos = Math.max(findColomn('|', currentRow),
findColomn('*', currentRow))) !== -1
&& (lastLinePos < colomnIndex - 1)) {
while (currentRow[++lastLinePos] === ' ');

if (lastLinePos === colomnIndex) {
currentRow[colomnIndex] = '|';
}
}
}
}

if (colomn === '*'
&& prevRow
&& prevRow[condenseIndex + 1] === '\\') {
flows.splice(condenseIndex + 1, 1);
}

if (colomn !== ' ') {
++condenseIndex;
}

++colomnIndex;
}

condenseCurrentLength = currentRow.filter((val) => {
return (val !== ' ' && val !== '_');
}).length;

// do some clean up
if (flows.length > condenseCurrentLength) {
flows.splice(condenseCurrentLength, flows.length - condenseCurrentLength);
}

colomnIndex = 0;

// a little inline analysis and draw process
while (colomnIndex < currentRow.length) {
colomn = currentRow[colomnIndex];
prevColomn = currentRow[colomnIndex - 1];

if (currentRow[colomnIndex] === ' ') {
currentRow.splice(colomnIndex, 1);
x += config.unitSize;

continue;
}

// inline interset
if ((colomn === '_' || colomn === '/')
&& currentRow[colomnIndex - 1] === '|'
&& currentRow[colomnIndex - 2] === '_') {
inlineIntersect = true;

tempFlow = flows.splice(colomnIndex - 2, 1)[0];
flows.splice(colomnIndex - 1, 0, tempFlow);
currentRow.splice(colomnIndex - 2, 1);

colomnIndex -= 1;
} else {
inlineIntersect = false;
}

color = flows[colomnIndex].color;

switch (colomn) {
case '_':
drawLineRight(x, y, color);

x += config.unitSize;
break;

case '*':
drawNode(x, y, color);
break;

case '|':
drawLineUp(x, y, color);
break;

case '/':
if (prevColomn
&& (prevColomn === '/'
|| prevColomn === ' ')) {
x -= config.unitSize;
}

drawLineOut(x, y, color);

x += config.unitSize;
break;

case '\\':
drawLineIn(x, y, color);
break;
}

++colomnIndex;
}

y -= config.unitSize;
}
};

init();
draw(graphList);
}
// @end-license

+ 23
- 4
webpack.config.js View File

@@ -4,17 +4,24 @@ const TerserPlugin = require('terser-webpack-plugin');
module.exports = {
mode: 'production',
entry: {
index: ['./web_src/js/index', './web_src/js/draw']
index: ['./web_src/js/index']
},
devtool: 'source-map',
output: {
path: path.resolve(__dirname, 'public/js'),
filename: 'index.js'
filename: 'index.js',
chunkFilename: '[name].js',
},
optimization: {
minimize: true,
minimizer: [new TerserPlugin({
sourceMap: true,
extractComments: false,
terserOptions: {
output: {
comments: false,
},
},
})],
},
module: {
@@ -33,10 +40,22 @@ module.exports = {
corejs: 3,
}
]
]
],
plugins: [
[
'@babel/plugin-transform-runtime',
{
regenerator: true,
}
]
],
}
}
}
},
{
test: /\.css$/i,
use: ['style-loader', 'css-loader'],
},
]
}
};

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