Add repo/branch links to GitHub's "Comparing Changes" page

This adds a link to the fork's branch on the GitHub "Comparing changes" page (AKA the "Create a Pull Request" page). See https://stackoverflow.com/questions/77623282/how-do-i-get-my-remote-branch-url-from-the-github-create-pull-request-page for more details.

คุณจะต้องติดตั้งส่วนขยาย เช่น Tampermonkey, Greasemonkey หรือ Violentmonkey เพื่อติดตั้งสคริปต์นี้

คุณจะต้องติดตั้งส่วนขยาย เช่น Tampermonkey หรือ Violentmonkey เพื่อติดตั้งสคริปต์นี้

คุณจะต้องติดตั้งส่วนขยาย เช่น Tampermonkey หรือ Violentmonkey เพื่อติดตั้งสคริปต์นี้

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Add repo/branch links to GitHub's "Comparing Changes" page
// @namespace    http://tampermonkey.net/
// @version      0.8
// @description  This adds a link to the fork's branch on the GitHub "Comparing changes" page (AKA the "Create a Pull Request" page). See https://stackoverflow.com/questions/77623282/how-do-i-get-my-remote-branch-url-from-the-github-create-pull-request-page for more details.
// @author       DanKaplanSES
// @match        https://github.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=github.com
// @require      https://code.jquery.com/jquery-3.7.1.min.js
// @grant        none
// @license MIT
// ==/UserScript==

// Official update link: https://greasyfork.org/en/scripts/481652/versions/new

const browseRepoHtml = `<div class="browse-repo"><a href="#" target="_blank">Browse Repo</a></div>`;
const browseBranchHtml = `<div class="browse-branch"><a href="#" target="_blank">Browse Branch</a></div>`;

jQuery.noConflict(true)(function ($) {
  function getEvents(jQueryElement) {
    const element = jQueryElement.get(0);
    const elemEvents = $._data(element, "events");
    const allDocEvnts = $._data(document, "events");
    function equalEvents(evt1, evt2) {
      return evt1.guid === evt2.guid;
    }

    for (let evntType in allDocEvnts) {
      if (allDocEvnts.hasOwnProperty(evntType)) {
        const evts = allDocEvnts[evntType];
        for (let i = 0; i < evts.length; i++) {
          if ($(element).is(evts[i].selector)) {
            if (elemEvents == null) {
              elemEvents = {};
            }
            if (!elemEvents.hasOwnProperty(evntType)) {
              elemEvents[evntType] = [];
            }
            if (
              !elemEvents[evntType].some(function (evt) {
                return equalEvents(evt, evts[i]);
              })
            ) {
              elemEvents[evntType].push(evts[i]);
            }
          }
        }
      }
    }
    return elemEvents;
  }

  $.fn.onFirst = function (name, fn) {
    this.bind(name, fn);
    for (let i = 0, _len = this.length; i < _len; i++) {
      let elem = this[i];
      let handlers = $._data(elem).events[name.split(".")[0]];
      handlers.unshift(handlers.pop());
    }
  };

  let hrefs = [];

  function modifyWhenReady(modificationFunction, isReady) {
    function modifyIfReady() {
      if (isReady()) {
        modificationFunction();
      }
    }
    modifyIfReady();
    setInterval(modifyIfReady, 1500);
  }

  function modifyRangeEditor() {
    hrefs = [];
    $(`.range-cross-repo-pair details`).wrap(
      `<div class="details-container"></div>`
    );

    const tempHrefs = [];
    $(`.details-container`).each(function (index) {
      const containerType =
        $(this).find(`summary.branch`).length > 0 ? `branch` : `repo`;
      const html = containerType === `repo` ? browseRepoHtml : browseBranchHtml;
      const href = hrefString(containerType, index);
      const containerContentsHidden = $(this).find(`details`).is(`:hidden`);
      $(this)
        .css({ display: containerContentsHidden ? `none` : `inline-block` })
        .append(html)
        .css({ "text-align": `center` })
        .find(`a`)
        .attr({ id: `browse-link-${index}`, href });
      tempHrefs.push(href);
    });

    $(`.range-editor .pre-mergability, .range-editor .d-inline-block`).css({
      "vertical-align": `top`,
    });

    hrefs = tempHrefs; // Only assigned when the loop has finished. This ensures modifyFiles only runs when all hrefs exist.
  }

  function hrefString(containerType, index) {
    switch (containerType) {
      case "repo":
        return `/` + $(`.css-truncate-target`)[index].textContent;
      case "branch":
        return (
          `/` +
          $(`.css-truncate-target`)[index - 1].textContent +
          `/tree/` +
          $(`.css-truncate-target`)[index].textContent
        );
      default:
        throw new Error(`Unexpected containerType: ${containerType}`);
    }
  }

  function modifyFiles() {
    const hrefOfBranchWithChanges = hrefs[hrefs.length - 1];
    hrefs = [];
    $(`#files a.Link--primary`).each(function (index) {
      const hrefToFile = $(this).attr("title");
      const detailsMenu = $(this).parents(`.file-header`).find(`details-menu`);

      const viewFileButton = detailsMenu.find(`a:contains('View file')`);
      const viewFileHref = hrefOfBranchWithChanges + "/" + hrefToFile;
      viewFileButton.replaceWith(
        $(
          `<a href="${viewFileHref}" class="pl-5 dropdown-item btn-link" target="_blank">View file</a>`
        )
      );

      const editFileButton = detailsMenu.find(`button:contains('Edit file')`);
      const editFileHref =
        hrefOfBranchWithChanges.replace(/\/tree\//, `/edit/`) +
        "/" +
        hrefToFile;
      editFileButton.replaceWith(
        $(
          `<a href="${editFileHref}" class="pl-5 dropdown-item btn-link" target="_blank">Edit file</a>`
        )
      );
    });
  }

  function resetRangeEditor() {
    $(`.range-cross-repo-pair details`).each(function (index) {
      const parent = $(this).parents(`.range-cross-repo-pair`);
      parent.append($(this)); // make $(this) a direct child
    });

    $(`.details-container`).remove();
  }

  modifyWhenReady(modifyRangeEditor, () => {
    return (
      location.pathname.indexOf(`/compare/`) !== -1 &&
      $(`#browse-link-0`).length === 0 &&
      $(`.range-cross-repo-pair details`).length > 0
    );
  });

  modifyWhenReady(modifyFiles, () => {
    return (
      location.pathname.indexOf(`/compare/`) !== -1 &&
      $(`#files`).length > 0 &&
      hrefs.length > 0
    );
  });

  modifyWhenReady(
    () => {
      $(`.js-toggle-range-editor-cross-repo`).onFirst(
        "click",
        resetRangeEditor
      );
    },
    () => {
      return (
        location.pathname.indexOf(`/compare/`) !== -1 &&
        getEvents($(`.js-toggle-range-editor-cross-repo`)) === undefined
      );
    }
  );

  $(`.js-toggle-range-editor-cross-repo`).onFirst("click", resetRangeEditor);
});