mirror of https://github.com/go-gitea/gitea.git
433 lines
13 KiB
JavaScript
433 lines
13 KiB
JavaScript
/* This is a customized version of https://github.com/bluef/gitgraph.js/blob/master/gitgraph.js
|
|
Changes include conversion to ES6 and linting fixes */
|
|
|
|
/*
|
|
* @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+$/g, '');
|
|
midStr = midStr.replace(/(--)|(-\.)/g,'-')
|
|
maxWidth = Math.max(midStr.replace(/(_|\s)/g, '').length, maxWidth);
|
|
|
|
row = midStr.split('');
|
|
|
|
graphList.unshift(row);
|
|
}
|
|
|
|
const width = maxWidth * config.unitSize;
|
|
const height = graphList.length * config.unitSize;
|
|
|
|
canvas.width = width * ratio;
|
|
canvas.height = height * ratio;
|
|
|
|
canvas.style.width = `${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 // eslint-disable-line no-cond-assign
|
|
&& (findColomn('_', currentRow) === -1))) {
|
|
flows.splice(nodePos - 1, 0, genNewFlow());
|
|
}
|
|
|
|
if (prevRowLength > currentRow.length
|
|
&& (nodePos = findColomn('*', prevRow)) !== -1) { // eslint-disable-line no-cond-assign
|
|
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] === '|') {
|
|
/* eslint-disable-next-line */
|
|
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)) {
|
|
/* eslint-disable-next-line */
|
|
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;
|
|
|
|
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 intersect
|
|
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;
|
|
}
|
|
|
|
if (colomn === '|' && currentRow[colomnIndex - 1] && currentRow[colomnIndex - 1] === '\\') {
|
|
flows.splice(colomnIndex, 0, genNewFlow());
|
|
}
|
|
|
|
color = flows[colomnIndex].color;
|
|
|
|
switch (colomn) {
|
|
case '-':
|
|
case '_':
|
|
drawLineRight(x, y, color);
|
|
|
|
x += config.unitSize;
|
|
break;
|
|
|
|
case '*':
|
|
drawNode(x, y, color);
|
|
break;
|
|
|
|
case '|':
|
|
if (prevColomn && prevColomn === '\\') {
|
|
x += config.unitSize;
|
|
}
|
|
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;
|
|
}
|
|
|
|
// do some clean up
|
|
if (flows.length > condenseCurrentLength) {
|
|
flows.splice(condenseCurrentLength, flows.length - condenseCurrentLength);
|
|
}
|
|
};
|
|
|
|
init();
|
|
draw(graphList);
|
|
}
|
|
// @end-license
|