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MacのSlackアプリをかなり黒くする

Last updated at Posted at 2018-07-25

概要

ついカっとなって黒くした。
若干見にくいけど満足。

Slack_-_cloudpack.png

ご参考

Slack Black Theme
https://github.com/widget-/slack-black-theme

アプリがElectronベースなので、jsとcssでゴニョゴニョ
できるよってことみたいです。

ドキュメントがしっかりと整っているので
手順通りにやれば設定できるだろうと思ってやってみたら、
中途半端に適用される罠があるので、みんなハマればいいと思います。

で、Issuesを眺めてたら下記Issuesが上がってました。

Had to add some additional css today
https://github.com/widget-/slack-black-theme/issues/48

MacのSlaskアプリがバージョンアップしてから
一部スタイルが適用されなくなったとのこと。

こちらのスレに対応策がコメントされてました(感謝

アプリがバージョンアップされると毎回設定しなおさなきゃなので、その対応。

上記のCSSだと一部テキストが読みにくいので、上記のCSSをご参考に。

手順

slack_dark_theme.js を作成(中身は後述)
パスやファイル名は任意で。

> touch ~/slack_dark_theme.js

.bash_profile とかにエイリアス登録

alias slackdark='cat ~/slack_dark_theme.js >> /Applications/Slack.app/Contents/Resources/app.asar.unpacked/src/static/ssb-interop.js'

.bash_profileを読み込み直してからアプリに適用。
アプリのバージョンが上がってテーマが戻ったらまた実行しましょう。

> slackdark

私が使っているjsおいておきますね。

slack_dark_theme.js

// slack_dark_theme
// First make sure the wrapper app is loaded
document.addEventListener("DOMContentLoaded", function() {

  // Then get its webviews
  let webviews = document.querySelectorAll(".TeamView webview");

  // Fetch our CSS in parallel ahead of time
  const cssPath = 'https://cdn.rawgit.com/widget-/slack-black-theme/master/custom.css';
  let cssPromise = fetch(cssPath).then(response => response.text());

  let customCustomCSS = `
  :root {
    /* Modify these to change your theme colors: */
    --primary: #61AFEF;
    --text: #ABB2BF;
    --background: #282C34;
    --background-elevated: #3B4048;
  }

  pre.special_formatting
  {
    background-color: #282C34 !important;
    color: #8f8f8f !important;
    border: solid;
    border-width: 1px !important;		
  }

  #im_browser .im_browser_row,
  .c-message_list__day_divider__line  
  { 
    border-top: 1px solid #afafaf;
  }

  div.c-message.c-message--light.c-message--hover,
  #file_preview_scroller .texty_comment_input,
  .c-message.c-message--light.c-message--hover.c-message--adjacent.c-message--last
  {
    color: #fff !important;
    background-color: #3B4048 !important;
  }

  #file_preview_scroller .message_sender,
  #file_preview_scroller .file_viewer_link,
  #file_preview_scroller .comment_body,
  #file_preview_scroller .ts_tip_btn,
  #file_preview_scroller .file_comment_tip,
  #file_preview_scroller .file_meta,
  #file_preview_scroller .file_ssb_download_link,
  .c-member--medium,
  .c-member__display-name, 
  .c-member__secondary-name--medium,  
  .c-team__display-name, 
  .c-usergroup__handle,
  .c-message_attachment,
  .c-message_attachment__pretext,
  .c-message_attachment__button,
  .c-message_attachment__select,
  .c-message_list__day_divider__label,
  .c-file__title,
  .c-file__meta,
  .c-reaction__count,
  .c-reaction_add__icon--fg,
  .c-input_select_options_list__option,
  .c-input_select_options_list_container:not(.c-input_select_options_list_container--always-open),
  span.c-message__body,
  a.c-message__sender_link,
  div.c-message_attachment__row,
  div.p-message_pane__foreword__description span,
  ts-conversation.message_container ts-message .message_content .message_sender,
  span.c-message_attachment__media_trigger.c-message_attachment__media_trigger--caption
  {
    color: #afafaf !important;
  }

  .c-reaction_add__icon--bg 
  {
    color: #282C34 !important;
  }  

  div.c-virtual_list__scroll_container,
  div.c-message:hover,
  .c-file_container,
  .c-file__slide--meta,  
  .c-reaction,
  .c-reaction_add,  
  .c-message_list__day_divider__label__pill,
  .c-button--outline,
  .c-message_attachment__button,
  .c-message_attachment__select,
  .c-input_select_options_list_container:not(.c-input_select_options_list_container--always-open),
  #im_browser #im_list_container:not(.keyboard_active).not_scrolling .im_browser_row:not(.disabled_dm):hover  
  {
    background-color: #282C34 !important;
  }

  .c-file__icon:after
  {
    border: 3px solid #282C34;
  } 

  .c-button--outline,
  .c-message_attachment__button,
  .c-message_attachment__select,
  .c-file_container,
  .c-reaction,
  .c-reaction_add,
  .c-input_select_options_list_container:not(.c-input_select_options_list_container--always-open)
  {
    border: 1px solid;
    border-color: #3B4048;
  }

  .c-file_container:hover,
  .c-reaction:focus,
  .c-reaction:hover,
  .c-reaction_add:focus,
  .c-reaction_add:hover,
  {
    border-color: #afafaf;
  }

  .c-file_container--has_thumb .c-file__actions:before 
  {
    background-image: linear-gradient(90deg,hsla(0,0%,100%,0),#282C34 20px);
  }

  .c-member_slug--link
  {
    background: #3B4048;
  }

  .c-member_slug--link:hover
  {
    background: #25272a;
  }

  .p-message_pane .c-message_list:not(.c-virtual_list--scrollbar), 
  .p-message_pane .c-message_list.c-virtual_list--scrollbar > .c-scrollbar__hider {
      z-index: 0;
  }
  `

  // Insert a style tag into the wrapper view
  cssPromise.then(css => {
    let s = document.createElement('style');
    s.type = 'text/css';
    s.innerHTML = css + customCustomCSS;
    document.head.appendChild(s);
  });

  // Wait for each webview to load
  webviews.forEach(webview => {
    webview.addEventListener('ipc-message', message => {
        if (message.channel == 'didFinishLoading')
          // Finally add the CSS into the webview
          cssPromise.then(css => {
              let script = `
                    let s = document.createElement('style');
                    s.type = 'text/css';
                    s.id = 'slack-custom-css';
                    s.innerHTML = \`${css + customCustomCSS}\`;
                    document.head.appendChild(s);
                    `
              webview.executeJavaScript(script);
          })
    });
  });
});
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