githubmirror/pdf.js

web/sidebar.css
88 строк3 KB
Calixte Denizet
Fix the sidebar resizer accessibility
27 янв 2026, 23:41
27 янв 2026, 23:41956c2a0
/* Copyright 2025 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

.sidebar {
  --sidebar-bg-color: light-dark(#fff, #23222b);
  --sidebar-border-color: light-dark(
    rgb(21 20 26 / 0.1),
    rgb(251 251 254 / 0.1)
  );
  --sidebar-box-shadow:
    0 0.25px 0.75px light-dark(rgb(0 0 0 / 0.05), rgb(0 0 0 / 0.2)),
    0 2px 6px 0 light-dark(rgb(0 0 0 / 0.1), rgb(0 0 0 / 0.4));
  --sidebar-backdrop-filter: none;
  --sidebar-border-radius: 8px;
  --sidebar-padding: 5px;
  --sidebar-min-width: 180px;
  --sidebar-max-width: 632px;
  --sidebar-width: 239px;
  --resizer-width: 4px;
  --resizer-hover-bg-color: light-dark(#0062fa, #00cadb);

  @media screen and (forced-colors: active) {
    --sidebar-bg-color: Canvas;
    --sidebar-border-color: CanvasText;
    --sidebar-box-shadow: none;
    --resizer-hover-bg-color: CanvasText;
  }

  border-radius: var(--sidebar-border-radius);
  box-shadow: var(--sidebar-box-shadow);
  border: 1px solid var(--sidebar-border-color);
  background-color: var(--sidebar-bg-color);
  inset-block-start: calc(100% + var(--doorhanger-height) - 2px);
  padding-block: var(--sidebar-padding);
  width: var(--sidebar-width);
  min-width: var(--sidebar-min-width);
  max-width: var(--sidebar-max-width);
  backdrop-filter: var(--sidebar-backdrop-filter);
  box-sizing: border-box;

  .sidebarResizer {
    width: var(--resizer-width);
    background-color: transparent;
    forced-color-adjust: none;
    cursor: ew-resize;
    position: absolute;
    inset-block: calc(var(--sidebar-padding) + var(--sidebar-border-radius));
    inset-inline-start: calc(0px - var(--resizer-width) / 2);
    transition: background-color 0.5s ease-in-out;
    box-sizing: border-box;
    border: 1px solid transparent;
    border-block-width: 0;
    background-clip: content-box;

    &:hover {
      background-color: var(--resizer-hover-bg-color);
    }
    &:focus-visible {
      background-color: var(--resizer-hover-bg-color);
      outline: none;
    }
  }

  &.resizing {
    cursor: ew-resize;
    user-select: none;

    :not(.sidebarResizer) {
      pointer-events: none;
    }

    .sidebarResizer {
      background-color: var(--resizer-hover-bg-color);
    }
  }
}