From c5083cda028963a5d12c2d4264ade904ea016930 Mon Sep 17 00:00:00 2001
From: Dominik Hufnagel <dominik.hufnagel@yoshteq.de>
Date: Thu, 21 Jan 2021 22:33:43 +0100
Subject: [PATCH] set font size and color on annotation layer

use the default appearance to set the font size and color of a text
annotation widget
---
 src/core/annotation.js          |  17 ++++++------
 src/display/annotation_layer.js |  45 +++++++++-----------------------
 test/pdfs/.gitignore            |   1 +
 test/pdfs/pr12828.pdf           | Bin 0 -> 16711 bytes
 test/test_manifest.json         |   8 ++++++
 5 files changed, 30 insertions(+), 41 deletions(-)
 create mode 100644 test/pdfs/pr12828.pdf

diff --git a/src/core/annotation.js b/src/core/annotation.js
index 27de618b90dd2..1e32d56f43268 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -997,9 +997,7 @@ class WidgetAnnotation extends Annotation {
     data.defaultAppearance = isString(defaultAppearance)
       ? defaultAppearance
       : "";
-    this._defaultAppearanceData = parseDefaultAppearance(
-      data.defaultAppearance
-    );
+    data.defaultAppearanceData = parseDefaultAppearance(data.defaultAppearance);
 
     const fieldType = getInheritableProperty({ dict, key: "FT" });
     data.fieldType = isName(fieldType) ? fieldType.name : null;
@@ -1294,7 +1292,7 @@ class WidgetAnnotation extends Annotation {
       // Doing so prevents exceptions and allows saving/printing
       // the file as expected.
       this.data.defaultAppearance = "/Helvetica 0 Tf 0 g";
-      this._defaultAppearanceData = parseDefaultAppearance(
+      this.data.defaultAppearanceData = parseDefaultAppearance(
         this.data.defaultAppearance
       );
     }
@@ -1377,7 +1375,7 @@ class WidgetAnnotation extends Annotation {
       },
     };
 
-    const { fontName, fontSize } = this._defaultAppearanceData;
+    const { fontName, fontSize } = this.data.defaultAppearanceData;
     await evaluator.handleSetFont(
       this._fieldResources.mergedResources,
       [fontName, fontSize],
@@ -1392,9 +1390,9 @@ class WidgetAnnotation extends Annotation {
   }
 
   _computeFontSize(font, height) {
-    let fontSize = this._defaultAppearanceData.fontSize;
+    let fontSize = this.data.defaultAppearanceData.fontSize;
     if (!fontSize) {
-      const { fontColor, fontName } = this._defaultAppearanceData;
+      const { fontColor, fontName } = this.data.defaultAppearanceData;
       let capHeight;
       if (font.capHeight) {
         capHeight = font.capHeight;
@@ -1456,7 +1454,7 @@ class WidgetAnnotation extends Annotation {
       PDFJSDev.test("!PRODUCTION || TESTING")
     ) {
       assert(
-        this._defaultAppearanceData,
+        this.data.defaultAppearanceData,
         "Expected `_defaultAppearanceData` to have been set."
       );
     }
@@ -1467,7 +1465,8 @@ class WidgetAnnotation extends Annotation {
     } = this._fieldResources;
 
     const fontNameStr =
-      this._defaultAppearanceData && this._defaultAppearanceData.fontName.name;
+      this.data.defaultAppearanceData &&
+      this.data.defaultAppearanceData.fontName.name;
     if (!fontNameStr) {
       return localResources || Dict.empty;
     }
diff --git a/src/display/annotation_layer.js b/src/display/annotation_layer.js
index 25a8fda525673..2e8e5f5265946 100644
--- a/src/display/annotation_layer.js
+++ b/src/display/annotation_layer.js
@@ -595,7 +595,6 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
   }
 
   render() {
-    const TEXT_ALIGNMENT = ["left", "center", "right"];
     const storage = this.annotationStorage;
     const id = this.data.id;
 
@@ -834,20 +833,9 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
       element.textContent = this.data.fieldValue;
       element.style.verticalAlign = "middle";
       element.style.display = "table-cell";
-
-      let font = null;
-      if (
-        this.data.fontRefName &&
-        this.page.commonObjs.has(this.data.fontRefName)
-      ) {
-        font = this.page.commonObjs.get(this.data.fontRefName);
-      }
-      this._setTextStyle(element, font);
     }
 
-    if (this.data.textAlignment !== null) {
-      element.style.textAlign = TEXT_ALIGNMENT[this.data.textAlignment];
-    }
+    this._setTextStyle(element);
 
     this.container.appendChild(element);
     return this.container;
@@ -858,32 +846,25 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
    *
    * @private
    * @param {HTMLDivElement} element
-   * @param {Object} font
    * @memberof TextWidgetAnnotationElement
    */
-  _setTextStyle(element, font) {
-    // TODO: This duplicates some of the logic in CanvasGraphics.setFont().
+  _setTextStyle(element) {
+    const TEXT_ALIGNMENT = ["left", "center", "right"];
+    const { fontSize, fontColor } = this.data.defaultAppearanceData;
     const style = element.style;
-    style.fontSize = `${this.data.fontSize}px`;
-    style.direction = this.data.fontDirection < 0 ? "rtl" : "ltr";
 
-    if (!font) {
-      return;
+    // TODO: If the font-size is zero, calculate it based on the height and
+    //       width of the element.
+    // Not setting `style.fontSize` will use the default font-size for now.
+    if (fontSize) {
+      style.fontSize = `${fontSize}px`;
     }
 
-    let bold = "normal";
-    if (font.black) {
-      bold = "900";
-    } else if (font.bold) {
-      bold = "bold";
-    }
-    style.fontWeight = bold;
-    style.fontStyle = font.italic ? "italic" : "normal";
+    style.color = Util.makeHexColor(fontColor[0], fontColor[1], fontColor[2]);
 
-    // Use a reasonable default font if the font doesn't specify a fallback.
-    const fontFamily = font.loadedName ? `"${font.loadedName}", ` : "";
-    const fallbackName = font.fallbackName || "Helvetica, sans-serif";
-    style.fontFamily = fontFamily + fallbackName;
+    if (this.data.textAlignment !== null) {
+      style.textAlign = TEXT_ALIGNMENT[this.data.textAlignment];
+    }
   }
 }
 
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index 2c72de34bd1cb..b53fb8b1ee61f 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -418,3 +418,4 @@
 !issue11555.pdf
 !issue12337.pdf
 !pr12564.pdf
+!pr12828.pdf
diff --git a/test/pdfs/pr12828.pdf b/test/pdfs/pr12828.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..f69caee844dce366f2aeb752192ef6ef52dd60c7
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/test/test_manifest.json b/test/test_manifest.json
index 29cd2ac475360..dfdf0983e9a4c 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -5005,5 +5005,13 @@
       "rounds": 1,
       "type": "eq",
       "annotations": true
+    },
+    {
+      "id": "pr12828",
+      "file": "pdfs/pr12828.pdf",
+      "md5": "e44d364fba2f146aed04f9d9abbb0f28",
+      "rounds": 1,
+      "type": "eq",
+      "forms": true
     }
 ]