fix textWithLink alignment (#3026)

fix #2938: textWithLink

Co-authored-by: Lukas Hollaender <[email protected]>

Author: vbinithyanandamv

src/modules/annotations.js

@@ -363,6 +363,13 @@ import { jsPDF } from "../jspdf.js";
     //TODO We really need the text baseline height to do this correctly.
     // Or ability to draw text on top, bottom, center, or baseline.
     y += height * 0.2;
+    //handle x position based on the align option
+    if (options.align === "center") {
+      x = x - width / 2; //since starting from center move the x position by half of text width
+    }
+    if (options.align === "right") {
+      x = x - width;
+    }
     this.link(x, y - height, width, height, options);
     return width;
   };

test/reference/textLinkWithAlignOptions.pdf

@@ -63,7 +63,7 @@ describe("Module: Annotations", () => {
     });
 
     doc.textWithLink("Click me!", 10, 10, {
-      url: "https://parall.ax/",
+      url: "https://parall.ax/"
     });
 
     doc.addPage("a4");
@@ -72,4 +72,38 @@ describe("Module: Annotations", () => {
 
     comparePdf(doc.output(), "insertLinkAddPage.pdf", "annotations");
   });
+  it("should align text link based on the align option", () => {
+    var doc = new jsPDF({
+      unit: "px",
+      format: [200, 300],
+      floatPrecision: 2
+    });
+
+    doc.textWithLink(
+      "Left aligned Link",
+      doc.internal.pageSize.getWidth() / 2,
+      10,
+      { align: "left", url: "https://www.google.com" }
+    );
+    doc.textWithLink(
+      "Center aligned Link",
+      doc.internal.pageSize.getWidth() / 2,
+      30,
+      { align: "center", url: "https://www.google.com" }
+    );
+    doc.textWithLink(
+      "Justify aligned Link",
+      doc.internal.pageSize.getWidth() / 2,
+      50,
+      { align: "justify", url: "https://www.google.com" }
+    );
+    doc.textWithLink(
+      "Right aligned Link",
+      doc.internal.pageSize.getWidth() / 2,
+      70,
+      { align: "right", url: "https://www.google.com" }
+    );
+
+    comparePdf(doc.output(), "textLinkWithAlignOptions.pdf", "annotations");
+  });
 });