Adding upstream version 9.0.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 271 insertions, 0 deletions

diff --git a/web_src/js/features/imagediff.js b/web_src/js/features/imagediff.js
new file mode 100644
index 0000000..d1b139f
--- /dev/null
+++ b/web_src/js/features/imagediff.js
@@ -0,0 +1,271 @@
+import $ from 'jquery';
+import {GET} from '../modules/fetch.js';
+import {hideElem, loadElem, queryElemChildren} from '../utils/dom.js';
+import {parseDom} from '../utils.js';
+
+function getDefaultSvgBoundsIfUndefined(text, src) {
+  const DefaultSize = 300;
+  const MaxSize = 99999;
+
+  const svgDoc = parseDom(text, 'image/svg+xml');
+  const svg = svgDoc.documentElement;
+  const width = svg?.width?.baseVal;
+  const height = svg?.height?.baseVal;
+  if (width === undefined || height === undefined) {
+    return null; // in case some svg is invalid or doesn't have the width/height
+  }
+  if (width.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE || height.unitType === SVGLength.SVG_LENGTHTYPE_PERCENTAGE) {
+    const img = new Image();
+    img.src = src;
+    if (img.width > 1 && img.width < MaxSize && img.height > 1 && img.height < MaxSize) {
+      return {
+        width: img.width,
+        height: img.height,
+      };
+    }
+    if (svg.hasAttribute('viewBox')) {
+      const viewBox = svg.viewBox.baseVal;
+      return {
+        width: DefaultSize,
+        height: DefaultSize * viewBox.width / viewBox.height,
+      };
+    }
+    return {
+      width: DefaultSize,
+      height: DefaultSize,
+    };
+  }
+  return null;
+}
+
+function createContext(imageAfter, imageBefore) {
+  const sizeAfter = {
+    width: imageAfter?.width || 0,
+    height: imageAfter?.height || 0,
+  };
+  const sizeBefore = {
+    width: imageBefore?.width || 0,
+    height: imageBefore?.height || 0,
+  };
+  const maxSize = {
+    width: Math.max(sizeBefore.width, sizeAfter.width),
+    height: Math.max(sizeBefore.height, sizeAfter.height),
+  };
+
+  return {
+    imageAfter,
+    imageBefore,
+    sizeAfter,
+    sizeBefore,
+    maxSize,
+    ratio: [
+      Math.floor(maxSize.width - sizeAfter.width) / 2,
+      Math.floor(maxSize.height - sizeAfter.height) / 2,
+      Math.floor(maxSize.width - sizeBefore.width) / 2,
+      Math.floor(maxSize.height - sizeBefore.height) / 2,
+    ],
+  };
+}
+
+export function initImageDiff() {
+  $('.image-diff:not([data-image-diff-loaded])').each(async function() {
+    const $container = $(this);
+    this.setAttribute('data-image-diff-loaded', 'true');
+
+    // the container may be hidden by "viewed" checkbox, so use the parent's width for reference
+    const diffContainerWidth = Math.max($container.closest('.diff-file-box').width() - 300, 100);
+
+    const imageInfos = [{
+      path: this.getAttribute('data-path-after'),
+      mime: this.getAttribute('data-mime-after'),
+      $images: $container.find('img.image-after'), // matches 3 <img>
+      $boundsInfo: $container.find('.bounds-info-after'),
+    }, {
+      path: this.getAttribute('data-path-before'),
+      mime: this.getAttribute('data-mime-before'),
+      $images: $container.find('img.image-before'), // matches 3 <img>
+      $boundsInfo: $container.find('.bounds-info-before'),
+    }];
+
+    await Promise.all(imageInfos.map(async (info) => {
+      const [success] = await Promise.all(Array.from(info.$images, (img) => {
+        return loadElem(img, info.path);
+      }));
+      // only the first images is associated with $boundsInfo
+      if (!success) info.$boundsInfo.text('(image error)');
+      if (info.mime === 'image/svg+xml') {
+        const resp = await GET(info.path);
+        const text = await resp.text();
+        const bounds = getDefaultSvgBoundsIfUndefined(text, info.path);
+        if (bounds) {
+          info.$images.each(function() {
+            this.setAttribute('width', bounds.width);
+            this.setAttribute('height', bounds.height);
+          });
+          hideElem(info.$boundsInfo);
+        }
+      }
+    }));
+
+    const $imagesAfter = imageInfos[0].$images;
+    const $imagesBefore = imageInfos[1].$images;
+
+    initSideBySide(this, createContext($imagesAfter[0], $imagesBefore[0]));
+    if ($imagesAfter.length > 0 && $imagesBefore.length > 0) {
+      initSwipe(createContext($imagesAfter[1], $imagesBefore[1]));
+      initOverlay(createContext($imagesAfter[2], $imagesBefore[2]));
+    }
+
+    queryElemChildren(this, '.image-diff-tabs', (el) => el.classList.remove('is-loading'));
+
+    function initSideBySide(container, sizes) {
+      let factor = 1;
+      if (sizes.maxSize.width > (diffContainerWidth - 24) / 2) {
+        factor = (diffContainerWidth - 24) / 2 / sizes.maxSize.width;
+      }
+
+      const widthChanged = sizes.imageAfter && sizes.imageBefore && sizes.imageAfter.naturalWidth !== sizes.imageBefore.naturalWidth;
+      const heightChanged = sizes.imageAfter && sizes.imageBefore && sizes.imageAfter.naturalHeight !== sizes.imageBefore.naturalHeight;
+      if (sizes.imageAfter) {
+        const boundsInfoAfterWidth = container.querySelector('.bounds-info-after .bounds-info-width');
+        if (boundsInfoAfterWidth) {
+          boundsInfoAfterWidth.textContent = `${sizes.imageAfter.naturalWidth}px`;
+          boundsInfoAfterWidth.classList.toggle('green', widthChanged);
+        }
+        const boundsInfoAfterHeight = container.querySelector('.bounds-info-after .bounds-info-height');
+        if (boundsInfoAfterHeight) {
+          boundsInfoAfterHeight.textContent = `${sizes.imageAfter.naturalHeight}px`;
+          boundsInfoAfterHeight.classList.toggle('green', heightChanged);
+        }
+      }
+
+      if (sizes.imageBefore) {
+        const boundsInfoBeforeWidth = container.querySelector('.bounds-info-before .bounds-info-width');
+        if (boundsInfoBeforeWidth) {
+          boundsInfoBeforeWidth.textContent = `${sizes.imageBefore.naturalWidth}px`;
+          boundsInfoBeforeWidth.classList.toggle('red', widthChanged);
+        }
+        const boundsInfoBeforeHeight = container.querySelector('.bounds-info-before .bounds-info-height');
+        if (boundsInfoBeforeHeight) {
+          boundsInfoBeforeHeight.textContent = `${sizes.imageBefore.naturalHeight}px`;
+          boundsInfoBeforeHeight.classList.add('red', heightChanged);
+        }
+      }
+
+      if (sizes.imageAfter) {
+        const container = sizes.imageAfter.parentNode;
+        sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
+        sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
+        container.style.margin = '10px auto';
+        container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
+        container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
+      }
+
+      if (sizes.imageBefore) {
+        const container = sizes.imageBefore.parentNode;
+        sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
+        sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
+        container.style.margin = '10px auto';
+        container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
+        container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
+      }
+    }
+
+    function initSwipe(sizes) {
+      let factor = 1;
+      if (sizes.maxSize.width > diffContainerWidth - 12) {
+        factor = (diffContainerWidth - 12) / sizes.maxSize.width;
+      }
+
+      if (sizes.imageAfter) {
+        const container = sizes.imageAfter.parentNode;
+        const swipeFrame = container.parentNode;
+        sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
+        sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
+        container.style.margin = `0px ${sizes.ratio[0] * factor}px`;
+        container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
+        container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
+        swipeFrame.style.padding = `${sizes.ratio[1] * factor}px 0 0 0`;
+        swipeFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
+      }
+
+      if (sizes.imageBefore) {
+        const container = sizes.imageBefore.parentNode;
+        const swipeFrame = container.parentNode;
+        sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
+        sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
+        container.style.margin = `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`;
+        container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
+        container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
+        swipeFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
+        swipeFrame.style.height = `${sizes.maxSize.height * factor + 2}px`;
+      }
+
+      // extra height for inner "position: absolute" elements
+      const swipe = $container.find('.diff-swipe')[0];
+      if (swipe) {
+        swipe.style.width = `${sizes.maxSize.width * factor + 2}px`;
+        swipe.style.height = `${sizes.maxSize.height * factor + 30}px`;
+      }
+
+      $container.find('.swipe-bar').on('mousedown', function(e) {
+        e.preventDefault();
+
+        const $swipeBar = $(this);
+        const $swipeFrame = $swipeBar.parent();
+        const width = $swipeFrame.width() - $swipeBar.width() - 2;
+
+        $(document).on('mousemove.diff-swipe', (e2) => {
+          e2.preventDefault();
+
+          const value = Math.max(0, Math.min(e2.clientX - $swipeFrame.offset().left, width));
+          $swipeBar[0].style.left = `${value}px`;
+          $container.find('.swipe-container')[0].style.width = `${$swipeFrame.width() - value}px`;
+
+          $(document).on('mouseup.diff-swipe', () => {
+            $(document).off('.diff-swipe');
+          });
+        });
+      });
+    }
+
+    function initOverlay(sizes) {
+      let factor = 1;
+      if (sizes.maxSize.width > diffContainerWidth - 12) {
+        factor = (diffContainerWidth - 12) / sizes.maxSize.width;
+      }
+
+      if (sizes.imageAfter) {
+        const container = sizes.imageAfter.parentNode;
+        sizes.imageAfter.style.width = `${sizes.sizeAfter.width * factor}px`;
+        sizes.imageAfter.style.height = `${sizes.sizeAfter.height * factor}px`;
+        container.style.margin = `${sizes.ratio[1] * factor}px ${sizes.ratio[0] * factor}px`;
+        container.style.width = `${sizes.sizeAfter.width * factor + 2}px`;
+        container.style.height = `${sizes.sizeAfter.height * factor + 2}px`;
+      }
+
+      if (sizes.imageBefore) {
+        const container = sizes.imageBefore.parentNode;
+        const overlayFrame = container.parentNode;
+        sizes.imageBefore.style.width = `${sizes.sizeBefore.width * factor}px`;
+        sizes.imageBefore.style.height = `${sizes.sizeBefore.height * factor}px`;
+        container.style.margin = `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`;
+        container.style.width = `${sizes.sizeBefore.width * factor + 2}px`;
+        container.style.height = `${sizes.sizeBefore.height * factor + 2}px`;
+
+        // some inner elements are `position: absolute`, so the container's height must be large enough
+        overlayFrame.style.width = `${sizes.maxSize.width * factor + 2}px`;
+        overlayFrame.style.height = `${sizes.maxSize.height * factor + 2}px`;
+      }
+
+      const rangeInput = $container[0].querySelector('input[type="range"]');
+      function updateOpacity() {
+        if (sizes.imageAfter) {
+          sizes.imageAfter.parentNode.style.opacity = `${rangeInput.value / 100}`;
+        }
+      }
+      rangeInput?.addEventListener('input', updateOpacity);
+      updateOpacity();
+    }
+  });
+}