421 lines
16 KiB
JavaScript
421 lines
16 KiB
JavaScript
/*
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*
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* Diff to HTML (diff2html.js)
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* Author: rtfpessoa
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* Date: Friday 29 August 2014
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* Last Update: Saturday 27 September 2014
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*
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* Diff command:
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* git diff
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*/
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(function (window) {
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var ClassVariable;
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ClassVariable = (function () {
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var LINE_TYPE = {
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INSERTS: "d2h-ins",
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DELETES: "d2h-del",
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CONTEXT: "d2h-cntx",
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INFO: "d2h-info"
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};
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function Diff2Html() {
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}
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/*
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* Generates pretty html from string diff input
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*/
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Diff2Html.prototype.getPrettyHtmlFromDiff = function (diffInput) {
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var diffJson = generateDiffJson(diffInput);
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return generateJsonHtml(diffJson);
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};
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/*
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* Generates json object from string diff input
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*/
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Diff2Html.prototype.getJsonFromDiff = function (diffInput) {
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return generateDiffJson(diffInput);
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};
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/*
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* Generates pretty html from a json object
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*/
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Diff2Html.prototype.getPrettyHtmlFromJson = function (diffJson) {
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return generateJsonHtml(diffJson);
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};
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/*
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* Generates pretty side by side html from string diff input
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*/
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Diff2Html.prototype.getPrettySideBySideHtmlFromDiff = function (diffInput) {
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var diffJson = generateDiffJson(diffInput);
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return generateSideBySideJsonHtml(diffJson);
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};
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/*
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* Generates pretty side by side html from a json object
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*/
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Diff2Html.prototype.getPrettySideBySideHtmlFromJson = function (diffJson) {
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return generateSideBySideJsonHtml(diffJson);
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};
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var generateDiffJson = function (diffInput) {
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var files = [],
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currentFile = null,
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currentBlock = null,
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oldLine = null,
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newLine = null;
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var saveBlock = function () {
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/* add previous block(if exists) before start a new file */
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if (currentBlock) {
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currentFile.blocks.push(currentBlock);
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currentBlock = null;
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}
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};
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var saveFile = function () {
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/* add previous file(if exists) before start a new one */
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if (currentFile) {
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files.push(currentFile);
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currentFile = null;
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}
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};
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var startFile = function (line) {
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saveBlock();
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saveFile();
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/* create file structure */
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currentFile = {};
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currentFile.blocks = [];
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currentFile.deletedLines = 0;
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currentFile.addedLines = 0;
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/* save file paths, before and after the diff */
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var values = /^diff --git a\/(\S+) b\/(\S+).*$/.exec(line);
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currentFile.oldName = values[1];
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currentFile.newName = values[2];
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};
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var startBlock = function (line) {
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saveBlock();
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var values;
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if (values = /^(@@ -(\d+),(\d+) \+(\d+),(\d+) @@).*/.exec(line)) {
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oldLine = values[2];
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newLine = values[4];
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} else {
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oldLine = 0;
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newLine = 0;
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}
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/* create block metadata */
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currentBlock = {};
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currentBlock.lines = [];
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currentBlock.oldStartLine = oldLine;
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currentBlock.newStartLine = newLine;
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currentBlock.header = line;
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};
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var createLine = function (line) {
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var currentLine = {};
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currentLine.content = line;
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/* fill the line data */
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if (startsWith(line, "+")) {
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currentFile.addedLines++;
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currentLine.type = LINE_TYPE.INSERTS;
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currentLine.oldNumber = null;
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currentLine.newNumber = newLine++;
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currentBlock.lines.push(currentLine);
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} else if (startsWith(line, "-")) {
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currentFile.deletedLines++;
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currentLine.type = LINE_TYPE.DELETES;
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currentLine.oldNumber = oldLine++;
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currentLine.newNumber = null;
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currentBlock.lines.push(currentLine);
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} else {
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currentLine.type = LINE_TYPE.CONTEXT;
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currentLine.oldNumber = oldLine++;
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currentLine.newNumber = newLine++;
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currentBlock.lines.push(currentLine);
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}
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};
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var diffLines = diffInput.split("\n");
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diffLines.forEach(function (line) {
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// Unmerged paths, and possibly other non-diffable files
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// https://github.com/scottgonzalez/pretty-diff/issues/11
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// Also, remove some useless lines
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if (!line || startsWith(line, "*") ||
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startsWith(line, "new") || startsWith(line, "index") ||
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startsWith(line, "---") || startsWith(line, "+++")) {
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return;
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}
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if (startsWith(line, "diff")) {
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startFile(line);
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} else if (currentFile && startsWith(line, "@@")) {
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startBlock(line);
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} else if (currentBlock) {
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createLine(line);
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}
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});
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saveBlock();
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saveFile();
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return files;
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};
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/*
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* Line By Line HTML
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*/
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var generateJsonHtml = function (diffFiles) {
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return "<div class=\"d2h-wrapper\">\n" +
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diffFiles.map(function (file) {
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return "<div class=\"d2h-file-wrapper\">\n" +
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" <div class=\"d2h-file-header\">\n" +
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" <div class=\"d2h-file-stats\">\n" +
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" <span class=\"d2h-lines-added\">+" + file.addedLines + "</span>\n" +
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" <span class=\"d2h-lines-deleted\">-" + file.deletedLines + "</span>\n" +
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" </div>\n" +
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" <div class=\"d2h-file-name\">" + getDiffName(file.oldName, file.newName) + "</div>\n" +
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" </div>\n" +
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" <div class=\"d2h-file-diff\">\n" +
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" <div class=\"d2h-code-wrapper\">\n" +
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" <table class=\"d2h-diff-table\">\n" +
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" <tbody class=\"d2h-diff-tbody\">\n" +
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" " + generateFileHtml(file) +
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" </tbody>\n" +
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" </table>\n" +
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" </div>\n" +
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" </div>\n" +
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" </div>\n";
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}).join("\n") +
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"</div>\n";
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};
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var generateFileHtml = function (file) {
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return file.blocks.map(function (block) {
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var lines = "<tr>\n" +
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" <td class=\"d2h-code-linenumber " + LINE_TYPE.INFO + "\" colspan=\"2\"></td>\n" +
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" <td class=\"" + LINE_TYPE.INFO + "\">" +
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" <div class=\"d2h-code-line " + LINE_TYPE.INFO + "\">" + escape(block.header) + "</div>" +
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" </td>\n" +
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"</tr>\n";
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for (var i = 0; i < block.lines.length; i++) {
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var line = block.lines[i];
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var newLine = block.lines[i + 1];
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if (line.type == LINE_TYPE.DELETES &&
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newLine && newLine.type == LINE_TYPE.INSERTS) {
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i++;
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var escapedLine = escape(line.content);
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var nextEscapedLine = escape(newLine.content);
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var diff = diffString(escapedLine, nextEscapedLine);
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lines = lines +
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generateLineHtml(line.type, line.oldNumber, line.newNumber, removeIns(diff)) +
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generateLineHtml(newLine.type, newLine.oldNumber, newLine.newNumber, removeDel(diff));
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} else {
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lines = lines +
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generateLineHtml(line.type, line.oldNumber, line.newNumber, line.content);
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}
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}
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return lines;
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}).join("\n");
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};
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var generateLineHtml = function (type, oldNumber, newNumber, content) {
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return "<tr>\n" +
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" <td class=\"d2h-code-linenumber " + type + "\">" +
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" <div class=\"line-num1\">" + valueOrEmpty(oldNumber) + "</div>" +
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" <div class=\"line-num2\">" + valueOrEmpty(newNumber) + "</div>" +
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" </td>\n" +
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" <td class=\"" + type + "\">" +
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" <div class=\"d2h-code-line " + type + "\">" + content + "</div>" +
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" </td>\n" +
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"</tr>\n";
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};
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/*
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* Side By Side HTML (work in progress)
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*/
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var generateSideBySideJsonHtml = function (diffFiles) {
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return "<div class=\"d2h-wrapper\">\n" +
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diffFiles.map(function (file) {
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var diffs = generateSideBySideFileHtml(file);
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return "<div class=\"d2h-file-wrapper\">\n" +
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" <div class=\"d2h-file-header\">\n" +
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" <div class=\"d2h-file-stats\">\n" +
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" <span class=\"d2h-lines-added\">+" + file.addedLines + "</span>\n" +
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" <span class=\"d2h-lines-deleted\">-" + file.deletedLines + "</span>\n" +
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" </div>\n" +
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" <div class=\"d2h-file-name\">" + getDiffName(file.oldName, file.newName) + "</div>\n" +
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" </div>\n" +
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" <div class=\"d2h-files-diff\">\n" +
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" <div class=\"d2h-file-side-diff\">\n" +
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" <div class=\"d2h-code-wrapper\">\n" +
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" <table class=\"d2h-diff-table\">\n" +
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" <tbody class=\"d2h-diff-tbody\">\n" +
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" " + diffs.left +
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" </tbody>\n" +
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" </table>\n" +
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" </div>\n" +
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" </div>\n" +
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" <div class=\"d2h-file-side-diff\">\n" +
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" <div class=\"d2h-code-wrapper\">\n" +
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" <table class=\"d2h-diff-table\">\n" +
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" <tbody class=\"d2h-diff-tbody\">\n" +
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" " + diffs.right +
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" </tbody>\n" +
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" </table>\n" +
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" </div>\n" +
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" </div>\n" +
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" </div>\n" +
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" </div>\n";
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}).join("\n") +
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"</div>\n";
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};
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var generateSideBySideFileHtml = function (file) {
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var fileHtml = {};
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fileHtml.left = "";
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fileHtml.right = "";
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file.blocks.forEach(function (block) {
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fileHtml.left += "<tr>\n" +
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" <td class=\"d2h-code-side-linenumber " + LINE_TYPE.INFO + "\"></td>\n" +
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" <td class=\"" + LINE_TYPE.INFO + "\" colspan=\"3\">" +
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" <div class=\"d2h-code-side-line " + LINE_TYPE.INFO + "\">" + escape(block.header) + "</div>" +
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" </td>\n" +
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"</tr>\n";
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fileHtml.right += "<tr>\n" +
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" <td class=\"d2h-code-side-linenumber " + LINE_TYPE.INFO + "\"></td>\n" +
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" <td class=\"" + LINE_TYPE.INFO + "\" colspan=\"3\">" +
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" <div class=\"d2h-code-side-line " + LINE_TYPE.INFO + "\"></div>" +
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" </td>\n" +
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"</tr>\n";
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for (var i = 0; i < block.lines.length; i++) {
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fileHtml.left += "<tr>\n";
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fileHtml.right += "<tr>\n";
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var line = block.lines[i];
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var newLine = block.lines[i + 1];
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if (line.type == LINE_TYPE.DELETES &&
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newLine && newLine.type == LINE_TYPE.INSERTS) {
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i++;
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var escapedLine = escape(line.content);
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var nextEscapedLine = escape(newLine.content);
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var diff = diffString(escapedLine, nextEscapedLine);
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fileHtml.left += generateSingleLineHtml(line.type, line.oldNumber, removeIns(diff));
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fileHtml.right += generateSingleLineHtml(newLine.type, newLine.newNumber, removeDel(diff));
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} else if (line.type == LINE_TYPE.DELETES) {
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fileHtml.left += generateSingleLineHtml(line.type, line.oldNumber, line.content);
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fileHtml.right += generateSingleLineHtml(LINE_TYPE.CONTEXT, "", "", "");
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} else if (line.type == LINE_TYPE.INSERTS) {
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fileHtml.left += generateSingleLineHtml(LINE_TYPE.CONTEXT, "", "", "");
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fileHtml.right += generateSingleLineHtml(line.type, line.newNumber, line.content);
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} else {
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fileHtml.left += generateSingleLineHtml(line.type, line.oldNumber, line.content);
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fileHtml.right += generateSingleLineHtml(line.type, line.newNumber, line.content);
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}
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fileHtml.left += "</tr>\n";
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fileHtml.right += "</tr>\n";
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}
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});
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return fileHtml;
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};
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var generateSingleLineHtml = function (type, number, content) {
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return "<td class=\"d2h-code-side-linenumber " + type + "\">" + number + "</td>\n" +
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" <td class=\"" + type + "\">" +
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" <div class=\"d2h-code-side-line " + type + "\">" + content + "</div>" +
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" </td>\n";
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};
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/*
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* HTML Helpers
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*/
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var getDiffName = function (oldFilename, newFilename) {
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return oldFilename === newFilename ? newFilename : oldFilename + " -> " + newFilename;
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};
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var removeIns = function (line) {
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return line.replace(/(<ins>(.*?)<\/ins>)/g, "");
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};
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var removeDel = function (line) {
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return line.replace(/(<del>(.*?)<\/del>)/g, "");
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};
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/*
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* Utils
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*/
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function escape(str) {
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return str.slice(0)
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.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">")
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.replace(/\t/g, " ");
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}
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function startsWith(str, start) {
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return str.indexOf(start) === 0;
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}
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function valueOrEmpty(value) {
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return value ? value : "";
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}
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/* singleton pattern */
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var instance;
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return {
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getInstance: function () {
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if (instance === undefined) {
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instance = new Diff2Html();
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/* Hide the constructor so the returned objected can't be new'd */
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instance.constructor = null;
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}
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return instance;
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}
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};
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})();
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window.Diff2Html = ClassVariable.getInstance();
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return window.Diff2Html;
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})(window);
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