[Editor] Make the comment sidebar resizable (bug 1990544)

test/integration/comment_spec.mjs

@@ -29,6 +29,7 @@ import {
 
 const switchToHighlight = switchToEditor.bind(null, "Highlight");
 const switchToStamp = switchToEditor.bind(null, "Stamp");
+const switchToComment = switchToEditor.bind(null, "Comment");
 
 describe("Comment", () => {
   describe("Comment edit dialog must be visible in ltr", () => {
@@ -236,4 +237,55 @@ describe("Comment", () => {
       );
     });
   });
+
+  describe("Comment sidebar", () => {
+    let pages;
+
+    beforeEach(async () => {
+      pages = await loadAndWait(
+        "comments.pdf",
+        ".annotationEditorLayer",
+        "page-width",
+        null,
+        { enableComment: true }
+      );
+    });
+
+    afterEach(async () => {
+      await closePages(pages);
+    });
+
+    it("must check that the comment sidebar is resizable", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          await switchToComment(page);
+
+          const sidebarSelector = "#editorCommentParamsToolbar";
+          for (const extraWidth of [100, -100]) {
+            const rect = await getRect(page, sidebarSelector);
+            const resizerRect = await getRect(
+              page,
+              "#editorCommentsSidebarResizer"
+            );
+            const startX = resizerRect.x + resizerRect.width / 2;
+            const startY = resizerRect.y + 2;
+            await page.mouse.move(startX, startY);
+            await page.mouse.down();
+
+            const steps = 20;
+            await page.mouse.move(startX - extraWidth, startY, { steps });
+            await page.mouse.up();
+
+            const rectAfter = await getRect(page, sidebarSelector);
+            expect(Math.abs(rectAfter.width - (rect.width + extraWidth)))
+              .withContext(`In ${browserName}`)
+              .toBeLessThanOrEqual(1);
+            expect(Math.abs(rectAfter.x - (rect.x - extraWidth)))
+              .withContext(`In ${browserName}`)
+              .toBeLessThanOrEqual(1);
+          }
+        })
+      );
+    });
+  });
 });

web/app.js

@@ -506,6 +506,9 @@ const PDFViewerApplication = {
               learnMoreUrl: AppOptions.get("commentLearnMoreUrl"),
               sidebar:
                 appConfig.annotationEditorParams?.editorCommentsSidebar || null,
+              sidebarResizer:
+                appConfig.annotationEditorParams
+                  ?.editorCommentsSidebarResizer || null,
               commentsList:
                 appConfig.annotationEditorParams?.editorCommentsSidebarList ||
                 null,

web/comment_manager.css

@@ -234,10 +234,7 @@
 
 #editorCommentsSidebar {
   display: flex;
-  width: 239px;
   height: auto;
-  min-width: 180px;
-  max-width: 632px;
   padding-bottom: 16px;
   flex-direction: column;
   align-items: flex-start;
@@ -331,8 +328,6 @@
       width: auto;
       padding: 4px 16px;
       gap: 10px;
-      flex: 1 0 0;
-      align-self: stretch;
       align-items: flex-start;
       flex-direction: column;
       list-style-type: none;

web/comment_manager.js

@@ -18,6 +18,7 @@ import {
   applyOpacity,
   CSSConstants,
   findContrastColor,
+  MathClamp,
   noContextMenu,
   PDFDateString,
   renderRichText,
@@ -56,7 +57,8 @@ class CommentManager {
       eventBus,
       linkService,
       this.#popup,
-      dateFormat
+      dateFormat,
+      ltr
     );
     this.#popup.sidebar = this.#sidebar;
     CommentManager.#hasForcedColors = hasForcedColors;
@@ -160,10 +162,21 @@ class CommentSidebar {
 
   #uiManager = null;
 
+  #minWidth = 0;
+
+  #maxWidth = 0;
+
+  #initialWidth = 0;
+
+  #width = 0;
+
+  #ltr;
+
   constructor(
     {
       learnMoreUrl,
       sidebar,
+      sidebarResizer,
       commentsList,
       commentCount,
       sidebarTitle,
@@ -173,7 +186,8 @@ class CommentSidebar {
     eventBus,
     linkService,
     popup,
-    dateFormat
+    dateFormat,
+    ltr
   ) {
     this.#sidebar = sidebar;
     this.#sidebarTitle = sidebarTitle;
@@ -184,7 +198,16 @@ class CommentSidebar {
     this.#closeButton = closeButton;
     this.#popup = popup;
     this.#dateFormat = dateFormat;
+    this.#ltr = ltr;
 
+    const style = window.getComputedStyle(sidebar);
+    this.#minWidth = parseFloat(style.getPropertyValue("--sidebar-min-width"));
+    this.#maxWidth = parseFloat(style.getPropertyValue("--sidebar-max-width"));
+    this.#initialWidth = this.#width = parseFloat(
+      style.getPropertyValue("--sidebar-width")
+    );
+
+    this.#makeSidebarResizable(sidebarResizer);
     closeButton.addEventListener("click", () => {
       eventBus.dispatch("switchannotationeditormode", {
         source: this,
@@ -205,6 +228,63 @@ class CommentSidebar {
     this.#sidebar.hidden = true;
   }
 
+  #makeSidebarResizable(resizer) {
+    let pointerMoveAC;
+    const cancelResize = () => {
+      this.#width = MathClamp(this.#width, this.#minWidth, this.#maxWidth);
+      this.#sidebar.classList.remove("resizing");
+      pointerMoveAC?.abort();
+      pointerMoveAC = null;
+    };
+    resizer.addEventListener("pointerdown", e => {
+      if (pointerMoveAC) {
+        cancelResize();
+        return;
+      }
+      const { clientX } = e;
+      stopEvent(e);
+      let prevX = clientX;
+      pointerMoveAC = new AbortController();
+      const { signal } = pointerMoveAC;
+      const sign = this.#ltr ? -1 : 1;
+      const sidebar = this.#sidebar;
+      const sidebarStyle = sidebar.style;
+      sidebar.classList.add("resizing");
+      const parentStyle = sidebar.parentElement.style;
+      parentStyle.minWidth = 0;
+      window.addEventListener("contextmenu", noContextMenu, { signal });
+      window.addEventListener(
+        "pointermove",
+        ev => {
+          if (!pointerMoveAC) {
+            return;
+          }
+          stopEvent(ev);
+          const { clientX: x } = ev;
+          const newWidth = (this.#width += sign * (x - prevX));
+          prevX = x;
+          if (newWidth > this.#maxWidth || newWidth < this.#minWidth) {
+            return;
+          }
+          sidebarStyle.width = `${newWidth.toFixed(3)}px`;
+          parentStyle.insetInlineStart = `${(this.#initialWidth - newWidth).toFixed(3)}px`;
+        },
+        { signal, capture: true }
+      );
+      window.addEventListener("blur", cancelResize, { signal });
+      window.addEventListener(
+        "pointerup",
+        ev => {
+          if (pointerMoveAC) {
+            cancelResize();
+            stopEvent(ev);
+          }
+        },
+        { signal }
+      );
+    });
+  }
+
   setUIManager(uiManager) {
     this.#uiManager = uiManager;
   }

web/sidebar.css

@@ -22,6 +22,12 @@
   --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-border-radius: 8px;
+  --sidebar-padding: 5px;
+  --sidebar-extra-width: 0px;
+  --sidebar-min-width: 180px;
+  --sidebar-max-width: 632px;
+  --sidebar-width: 239px;
 
   @media screen and (forced-colors: active) {
     --sidebar-bg-color: Canvas;
@@ -29,9 +35,31 @@
     --sidebar-box-shadow: none;
   }
 
-  border-radius: 8px;
+  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);
+
+  .sidebarResizer {
+    width: 4px;
+    background-color: transparent;
+    forced-color-adjust: none;
+    cursor: ew-resize;
+    position: absolute;
+    inset-block: calc(var(--sidebar-padding) + var(--sidebar-border-radius));
+  }
+
+  &.resizing {
+    cursor: ew-resize;
+    user-select: none;
+
+    :not(.sidebarResizer) {
+      pointer-events: none;
+    }
+  }
 }

web/viewer.css

@@ -1084,7 +1084,6 @@ dialog :link {
   }
 
   .menuContainer {
-    width: 100%;
     height: auto;
     max-height: calc(
       var(--viewer-container-height) - var(--toolbar-height) -

web/viewer.html

@@ -251,6 +251,7 @@ See https://github.com/adobe-type-tools/cmap-resources
                     </button>
                     <div class="editorParamsToolbar hidden menu" id="editorCommentParamsToolbar">
                       <div id="editorCommentsSidebar" class="menuContainer comment sidebar" role="landmark" aria-labelledby="editorCommentsSidebarHeader">
+                        <div id="editorCommentsSidebarResizer" class="sidebarResizer"></div>
                         <div id="editorCommentsSidebarHeader" role="heading" aria-level="2">
                           <span class="commentCount">
                             <span id="editorCommentsSidebarTitle" data-l10n-id="pdfjs-editor-comments-sidebar-title" data-l10n-args='{ "count": 0 }'></span>

web/viewer.js

@@ -258,6 +258,9 @@ function getViewerConfiguration() {
       editorCommentsSidebarList: document.getElementById(
         "editorCommentsSidebarList"
       ),
+      editorCommentsSidebarResizer: document.getElementById(
+        "editorCommentsSidebarResizer"
+      ),
       editorFreeTextFontSize: document.getElementById("editorFreeTextFontSize"),
       editorFreeTextColor: document.getElementById("editorFreeTextColor"),
       editorInkColor: document.getElementById("editorInkColor"),