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

Browse source 
- 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.
This commit is contained in:
silverwind 2019-11-17 22:39:06 +01:00 committed by Lauris BH
parent 06984bbcbf
commit f8bd90ba60
23 changed files with 1313 additions and 655 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

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

1
.eslintrc
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@ -14,6 +14,7 @@ env:
node: true
globals:
__webpack_public_path__: true
Clipboard: false
CodeMirror: false
Dropzone: false

1005
package-lock.json generated
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4
package.json
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@ -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
public/js/gitgraph.js Normal file
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public/js/gitgraph.js.map Normal file
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2
public/js/index.js
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2
public/js/index.js.map
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3
public/vendor/VERSIONS vendored
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@ -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

2
public/vendor/librejs.html vendored
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@ -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>

435
public/vendor/plugins/gitgraph/gitgraph.js vendored
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@ -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

1
routers/repo/commit.go
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@ -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)
}

4
templates/base/footer.tmpl
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@ -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}}

5
templates/base/head.tmpl
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@ -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}}

3
templates/pwa/serviceworker_js.tmpl
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@ -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}}',

15
web_src/js/draw.js
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@ -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
web_src/js/gitGraph.js Normal file
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@ -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
web_src/js/index.js
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@ -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
web_src/js/publicPath.js Normal file
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@ -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__ = `${script.getAttribute('src').replace(/\/[^/]*$/, '')}/`;
}

0
public/vendor/plugins/gitgraph/LICENSE → web_src/vendor/gitgraph.js/LICENSE vendored
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3
public/vendor/plugins/gitgraph/gitgraph.css → web_src/vendor/gitgraph.js/gitgraph.custom.css vendored
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@ -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%}

419
web_src/vendor/gitgraph.js/gitgraph.custom.js vendored Normal file
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@ -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

25
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'],
},
]
}
};