mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-11-25 03:06:10 +01:00
22e1bd31c6
* Add model and tests for graph * Add route and router for graph * Add assets for graph * Add template for graph
399 lines
10 KiB
JavaScript
399 lines
10 KiB
JavaScript
/*
|
|
* 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 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);
|
|
}
|
|
|
|
canvas.width = maxWidth * config.unitSize;
|
|
canvas.height = graphList.length * config.unitSize;
|
|
|
|
ctx.lineWidth = config.lineWidth;
|
|
ctx.lineJoin = "round";
|
|
ctx.lineCap = "round";
|
|
};
|
|
|
|
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 genNewFlow = function () {
|
|
var newId;
|
|
|
|
do {
|
|
newId = genRandomStr();
|
|
} while (findFlow(newId) !== -1);
|
|
|
|
return {id:newId, color:"#" + newId};
|
|
};
|
|
|
|
//draw method
|
|
var drawLineRight = function (x, y, color) {
|
|
ctx.strokeStyle = color;
|
|
ctx.beginPath();
|
|
ctx.moveTo(x, y + config.unitSize / 2);
|
|
ctx.lineTo(x + config.unitSize, y + config.unitSize / 2);
|
|
ctx.stroke();
|
|
};
|
|
|
|
var drawLineUp = function (x, y, color) {
|
|
ctx.strokeStyle = color;
|
|
ctx.beginPath();
|
|
ctx.moveTo(x, y + config.unitSize / 2);
|
|
ctx.lineTo(x, y - config.unitSize / 2);
|
|
ctx.stroke();
|
|
};
|
|
|
|
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) {
|
|
ctx.strokeStyle = color;
|
|
|
|
ctx.beginPath();
|
|
ctx.moveTo(x + config.unitSize, y + config.unitSize / 2);
|
|
ctx.lineTo(x, y - config.unitSize / 2);
|
|
ctx.stroke();
|
|
};
|
|
|
|
var drawLineOut = function (x, y, color) {
|
|
ctx.strokeStyle = color;
|
|
ctx.beginPath();
|
|
ctx.moveTo(x, y + config.unitSize / 2);
|
|
ctx.lineTo(x + config.unitSize, y - config.unitSize / 2);
|
|
ctx.stroke();
|
|
};
|
|
|
|
var draw = function (graphList) {
|
|
var colomn, colomnIndex, prevColomn, condenseIndex;
|
|
var x, y;
|
|
var color;
|
|
var nodePos, outPos;
|
|
var tempFlow;
|
|
var prevRowLength = 0;
|
|
var flowSwapPos = -1;
|
|
var lastLinePos;
|
|
var i, k, l;
|
|
var condenseCurrentLength, condensePrevLength = 0, condenseNextLength = 0;
|
|
|
|
var inlineIntersect = false;
|
|
|
|
//initiate 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 - 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;
|
|
while (colomnIndex < currentRow.length) {
|
|
colomn = currentRow[colomnIndex];
|
|
|
|
if (colomn !== " " && colomn !== "_") {
|
|
++condensePrevLength;
|
|
}
|
|
|
|
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 intersetc 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);
|
|
}; |