gitlab-org--gitlab-foss/app/assets/stylesheets/page_bundles/_ide_monaco_overrides.scss

// stylelint-disable selector-class-pattern
// stylelint-disable selector-max-compound-selectors
// stylelint-disable stylelint-gitlab/duplicate-selectors
// stylelint-disable stylelint-gitlab/utility-classes

.blob-editor-container {
  flex: 1;
  height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;

  .vertical-center {
    min-height: auto;
  }

  .monaco-editor .lines-content .cigr {
    display: none;
  }

  .is-readonly .editor.original {
    .view-lines {
      cursor: default;
    }

    .cursors-layer {
      display: none;
    }
  }

  .is-deleted {
    .editor.modified {
      .margin-view-overlays,
      .lines-content,
      .decorationsOverviewRuler {
        // !important to override monaco inline styles
        display: none !important;
      }
    }

    .diffOverviewRuler.modified {
      // !important to override monaco inline styles
      display: none !important;
    }
  }

  .is-added {
    .editor.original {
      .margin-view-overlays,
      .lines-content,
      .decorationsOverviewRuler {
        // !important to override monaco inline styles
        display: none !important;
      }
    }

    .diffOverviewRuler.original {
      // !important to override monaco inline styles
      display: none !important;
    }
  }
}

.multi-file-editor-holder {
  height: 100%;
  min-height: 0; // firefox fix
}

// Apply theme related overrides only to the white theme and none theme
.theme-white .blob-editor-container,
.theme-none .blob-editor-container {
  .monaco-diff-editor {
    .editor.modified {
      box-shadow: none;
    }

    .diagonal-fill {
      display: none !important;
    }

    .diffOverview {
      background-color: $white;
      border-left: 1px solid $white-dark;
      cursor: ns-resize;
    }

    .diffViewport {
      display: none;
    }

    .char-insert {
      background-color: $line-added-dark-transparent;
    }

    .char-delete {
      background-color: $line-removed-dark-transparent;
    }

    .line-numbers {
      color: $black-transparent;
    }

    .view-overlays {
      .line-insert {
        background-color: $line-added-transparent;
      }

      .line-delete {
        background-color: $line-removed-transparent;
      }
    }

    .margin {
      background-color: $white;
      border-right: 1px solid $gray-100;

      .line-insert {
        border-right: 1px solid $line-added-dark;
      }

      .line-delete {
        border-right: 1px solid $line-removed-dark;
      }
    }

    .margin-view-overlays .insert-sign,
    .margin-view-overlays .delete-sign {
      opacity: 0.4;
    }
  }
}

.theme-white .multi-file-editor-holder,
.theme-none .multi-file-editor-holder {
  &.is-readonly,
  .editor.original {
    .monaco-editor,
    .monaco-editor-background,
    .monaco-editor .inputarea.ime-input {
      background-color: $gray-10;
    }
  }
}