pdf.js/web/annotation_editor_layer_builder.css

/* Copyright 2022 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.
 */

:root {
  --outline-width: 2px;
  --outline-color: #0060df;
  --outline-around-width: 1px;
  --outline-around-color: #f0f0f4;
  --focus-outline: solid var(--outline-width) var(--outline-color);
  --unfocus-outline: solid var(--outline-width) transparent;
  --focus-outline-around: solid var(--outline-around-width)
    var(--outline-around-color);
  --hover-outline: dashed var(--outline-width) var(--outline-color);
  --freetext-line-height: 1.35;
  --freetext-padding: 2px;
  --resizer-bg-color: var(--outline-color);
  --resizer-size: 6px;
  --resizer-shift: calc(
    0px - (var(--outline-width) + var(--resizer-size)) / 2 -
      var(--outline-around-width)
  );
  --editorFreeText-editing-cursor: text;
  /*#if COMPONENTS*/
  --editorInk-editing-cursor: pointer;
  /*#else*/
  --editorInk-editing-cursor: url(images/cursor-editorInk.svg) 0 16, pointer;
  /*#endif*/

  --alt-text-opacity: 0.8;
  --alt-text-add-image: url(images/altText_add.svg);
  --alt-text-done-image: url(images/altText_done.svg);
  --alt-text-bg-color: rgba(43, 42, 51, var(--alt-text-opacity));
  --alt-text-fg-color: #fbfbfe;
  --alt-text-border-color: var(--alt-text-bg-color);
  --alt-text-hover-bg-color: rgba(82, 82, 94, var(--alt-text-opacity));
  --alt-text-hover-fg-color: var(--alt-text-fg-color);
  --alt-text-hover-border-color: var(--alt-text-hover-bg-color);
  --alt-text-active-bg-color: rgba(91, 91, 102, var(--alt-text-opacity));
  --alt-text-active-fg-color: var(--alt-text-fg-color);
  --alt-text-active-border-color: var(--alt-text-hover-bg-color);
  --alt-text-focus-outline-color: #0060df;
  --alt-text-focus-border-color: #f0f0f4;
  --alt-text-shadow: 0 2px 6px 0 rgba(28, 27, 34, 0.5);
}

@media (min-resolution: 1.1dppx) {
  :root {
    /*#if !COMPONENTS*/
    --editorFreeText-editing-cursor: url(images/cursor-editorFreeText.svg) 0 16,
      text;
    /*#endif*/
  }
}

@media screen and (forced-colors: active) {
  :root {
    --outline-color: CanvasText;
    --outline-around-color: ButtonFace;
    --resizer-bg-color: ButtonText;

    --alt-text-bg-color: Canvas;
    --alt-text-fg-color: ButtonText;
    --alt-text-border-color: ButtonText;
    --alt-text-hover-bg-color: Canvas;
    --alt-text-hover-fg-color: SelectedItem;
    --alt-text-hover-border-color: SelectedItem;
    --alt-text-active-bg-color: ButtonFace;
    --alt-text-active-fg-color: SelectedItem;
    --alt-text-active-border-color: ButtonText;
    --alt-text-focus-outline-color: CanvasText;
    --alt-text-focus-border-color: ButtonText;
    --alt-text-shadow: none;
    --alt-text-opacity: 1;
  }
}

[data-editor-rotation="90"] {
  transform: rotate(90deg);
}
[data-editor-rotation="180"] {
  transform: rotate(180deg);
}
[data-editor-rotation="270"] {
  transform: rotate(270deg);
}

.annotationEditorLayer {
  background: transparent;
  position: absolute;
  inset: 0;
  font-size: calc(100px * var(--scale-factor));
  transform-origin: 0 0;
  cursor: auto;
  z-index: 4;
}

.annotationEditorLayer.waiting {
  content: "";
  cursor: wait;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.annotationEditorLayer.freeTextEditing {
  cursor: var(--editorFreeText-editing-cursor);
}

.annotationEditorLayer.inkEditing {
  cursor: var(--editorInk-editing-cursor);
}

.annotationEditorLayer :is(.freeTextEditor, .inkEditor, .stampEditor) {
  position: absolute;
  background: transparent;
  border-radius: 3px;
  z-index: 1;
  transform-origin: 0 0;
  cursor: auto;
  max-width: 100%;
  max-height: 100%;
  border: var(--unfocus-outline);

  &.draggable.selectedEditor {
    cursor: move;
  }

  &.selectedEditor {
    border: var(--focus-outline);
    outline: var(--focus-outline-around);

    &::before {
      /*
        This is a workaround for the lack of support for stripes(...) (see
        https://drafts.csswg.org/css-images-4/#stripes).
        The outline should be composed of 1px white, 2px blue and 1px white.
        This could be achieved in different ways:
          - using a linear-gradient;
          - using a box-shadow;
          - using an outline on the selected element and an outline+border on
            the ::before pseudo-element.
        All these options lead to incorrect rendering likely due to rounding
        issues.
        That said it doesn't mean that the current is ideal, but it's the best
        we could come up with for the moment.
        One drawback of this approach is that we use a border on the selected
        element which means that we must take care of it when positioning the
        div in js (see AnnotationEditor._borderLineWidth in editor.js).
      */
      content: "";
      position: absolute;
      inset: 0;
      border: var(--focus-outline-around);
    }
  }

  &:hover:not(.selectedEditor) {
    border: var(--hover-outline);
  }
}

.annotationEditorLayer .freeTextEditor {
  padding: calc(var(--freetext-padding) * var(--scale-factor));
  width: auto;
  height: auto;
  touch-action: none;
}

.annotationEditorLayer .freeTextEditor .internal {
  background: transparent;
  border: none;
  inset: 0;
  overflow: visible;
  white-space: nowrap;
  font: 10px sans-serif;
  line-height: var(--freetext-line-height);
  user-select: none;
}

.annotationEditorLayer .freeTextEditor .overlay {
  position: absolute;
  display: none;
  background: transparent;
  inset: 0;
  width: 100%;
  height: 100%;
}

.annotationEditorLayer .freeTextEditor .overlay.enabled {
  display: block;
}

.annotationEditorLayer .freeTextEditor .internal:empty::before {
  content: attr(default-content);
  color: gray;
}

.annotationEditorLayer .freeTextEditor .internal:focus {
  outline: none;
  user-select: auto;
}

.annotationEditorLayer .inkEditor {
  width: 100%;
  height: 100%;
}

.annotationEditorLayer .inkEditor.editing {
  cursor: inherit;
}

.annotationEditorLayer .inkEditor .inkEditorCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.annotationEditorLayer .stampEditor {
  width: auto;
  height: auto;
}

.annotationEditorLayer .stampEditor canvas {
  width: 100%;
  height: 100%;
}

.annotationEditorLayer {
  :is(.freeTextEditor, .inkEditor, .stampEditor) {
    & > .resizers {
      position: absolute;
      inset: 0;

      &.hidden {
        display: none;
      }

      & > .resizer {
        width: var(--resizer-size);
        height: var(--resizer-size);
        background: var(--resizer-bg-color);
        border: var(--focus-outline-around);
        position: absolute;

        &.topLeft {
          top: var(--resizer-shift);
          left: var(--resizer-shift);
        }

        &.topMiddle {
          top: var(--resizer-shift);
          left: calc(50% + var(--resizer-shift));
        }

        &.topRight {
          top: var(--resizer-shift);
          right: var(--resizer-shift);
        }

        &.middleRight {
          top: calc(50% + var(--resizer-shift));
          right: var(--resizer-shift);
        }

        &.bottomRight {
          bottom: var(--resizer-shift);
          right: var(--resizer-shift);
        }

        &.bottomMiddle {
          bottom: var(--resizer-shift);
          left: calc(50% + var(--resizer-shift));
        }

        &.bottomLeft {
          bottom: var(--resizer-shift);
          left: var(--resizer-shift);
        }

        &.middleLeft {
          top: calc(50% + var(--resizer-shift));
          left: var(--resizer-shift);
        }
      }
    }
  }

  &[data-main-rotation="0"]
    :is([data-editor-rotation="0"], [data-editor-rotation="180"]),
  &[data-main-rotation="90"]
    :is([data-editor-rotation="270"], [data-editor-rotation="90"]),
  &[data-main-rotation="180"]
    :is([data-editor-rotation="180"], [data-editor-rotation="0"]),
  &[data-main-rotation="270"]
    :is([data-editor-rotation="90"], [data-editor-rotation="270"]) {
    & > .resizers > .resizer {
      &.topLeft,
      &.bottomRight {
        cursor: nwse-resize;
      }

      &.topMiddle,
      &.bottomMiddle {
        cursor: ns-resize;
      }

      &.topRight,
      &.bottomLeft {
        cursor: nesw-resize;
      }

      &.middleRight,
      &.middleLeft {
        cursor: ew-resize;
      }
    }
  }

  &[data-main-rotation="0"]
    :is([data-editor-rotation="90"], [data-editor-rotation="270"]),
  &[data-main-rotation="90"]
    :is([data-editor-rotation="0"], [data-editor-rotation="180"]),
  &[data-main-rotation="180"]
    :is([data-editor-rotation="270"], [data-editor-rotation="90"]),
  &[data-main-rotation="270"]
    :is([data-editor-rotation="180"], [data-editor-rotation="0"]) {
    & > .resizers > .resizer {
      &.topLeft,
      &.bottomRight {
        cursor: nesw-resize;
      }

      &.topMiddle,
      &.bottomMiddle {
        cursor: ew-resize;
      }

      &.topRight,
      &.bottomLeft {
        cursor: nwse-resize;
      }

      &.middleRight,
      &.middleLeft {
        cursor: ns-resize;
      }
    }
  }

  &
    :is(
      [data-main-rotation="0"] [data-editor-rotation="90"],
      [data-main-rotation="90"] [data-editor-rotation="0"],
      [data-main-rotation="180"] [data-editor-rotation="270"],
      [data-main-rotation="270"] [data-editor-rotation="180"]
    ) {
    & .altText {
      rotate: 270deg;

      &:dir(ltr) {
        inset-inline-start: calc(100% - 8px);

        &.small {
          inset-inline-start: calc(100% + 8px);
          inset-block-start: 100%;
        }
      }

      &:dir(rtl) {
        inset-block-end: calc(100% - 8px);

        &.small {
          inset-inline-start: -8px;
          inset-block-start: 0;
        }
      }
    }
  }

  &
    :is(
      [data-main-rotation="0"] [data-editor-rotation="180"],
      [data-main-rotation="90"] [data-editor-rotation="90"],
      [data-main-rotation="180"] [data-editor-rotation="0"],
      [data-main-rotation="270"] [data-editor-rotation="270"]
    ) {
    & .altText {
      rotate: 180deg;

      inset-block-end: calc(100% - 8px);
      inset-inline-start: calc(100% - 8px);

      &.small {
        inset-inline-start: 100%;
        inset-block-start: -8px;
      }
    }
  }

  &
    :is(
      [data-main-rotation="0"] [data-editor-rotation="270"],
      [data-main-rotation="90"] [data-editor-rotation="180"],
      [data-main-rotation="180"] [data-editor-rotation="90"],
      [data-main-rotation="270"] [data-editor-rotation="0"]
    ) {
    & .altText {
      rotate: 90deg;

      &:dir(ltr) {
        inset-block-end: calc(100% - 8px);

        &.small {
          inset-inline-start: -8px;
          inset-block-start: 0;
        }
      }

      &:dir(rtl) {
        inset-inline-start: calc(100% - 8px);

        &.small {
          inset-inline-start: calc(100% + 8px);
          inset-block-start: 100%;
        }
      }
    }
  }
}

.altText {
  display: flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: 24px;
  min-width: 88px;
  z-index: 1;
  pointer-events: all;

  color: var(--alt-text-fg-color);
  font: menu;
  font-size: 12px;
  border-radius: 4px;
  border: 1px solid var(--alt-text-border-color);
  background-color: var(--alt-text-bg-color);
  box-shadow: var(--alt-text-shadow);

  position: absolute;
  inset-block-end: 8px;
  inset-inline-start: 8px;

  &:dir(ltr) {
    transform-origin: 0 100%;
  }
  &:dir(rtl) {
    transform-origin: 100% 100%;
  }

  &.small {
    &:dir(ltr) {
      transform-origin: 0 0;
    }
    &:dir(rtl) {
      transform-origin: 100% 0;
    }

    inset-block-end: unset;
    inset-inline-start: 0;
    inset-block-start: calc(100% + 8px);
  }

  &:hover {
    background-color: var(--alt-text-hover-bg-color);
    border-color: var(--alt-text-hover-border-color);
    color: var(--alt-text-hover-fg-color);
    cursor: pointer;

    &::before {
      background-color: var(--alt-text-hover-fg-color);
    }
  }

  &:active {
    background-color: var(--alt-text-active-bg-color);
    border-color: var(--alt-text-active-border-color);
    color: var(--alt-text-active-fg-color);

    &::before {
      background-color: var(--alt-text-active-fg-color);
    }
  }

  &:focus-visible {
    outline: 2px solid var(--alt-text-focus-outline-color);
    border-color: var(--alt-text-focus-border-color);
  }

  &::before {
    content: "";
    mask-image: var(--alt-text-add-image);
    mask-size: cover;
    mask-repeat: no-repeat;
    mask-position: center;
    display: inline-block;
    width: 12px;
    height: 12px;
    background-color: var(--alt-text-fg-color);
    margin-inline-end: 4px;
  }

  &.done::before {
    mask-image: var(--alt-text-done-image);
  }
}