When searching for a group of punctuation signs, only add extraspaces around the group

It fixes #20225.

And only add the extra spaces where it's required depending on their position in the query string.

Author: calixteman

test/pdfs/.gitignore

@@ -761,3 +761,4 @@
 !extract_link.pdf
 !two_paragraphs.pdf
 !paragraph_and_link.pdf
+!issue20225.pdf

test/pdfs/issue20225.pdf

@@ -634,8 +634,8 @@ describe("pdf_find_controller", function () {
         pageIndex: 0,
         matchIndex: 0,
       },
-      pageMatches: [[1497]],
-      pageMatchesLength: [[25]],
+      pageMatches: [[1498]],
+      pageMatchesLength: [[24]],
     });
   });
 
@@ -1138,6 +1138,26 @@ describe("pdf_find_controller", function () {
     });
   });
 
+  it("performs a search with a group of punctuation signs", async () => {
+    const { eventBus, pdfFindController } =
+      await initPdfFindController("issue20225.pdf");
+
+    await testSearch({
+      eventBus,
+      pdfFindController,
+      state: {
+        query: "....",
+      },
+      matchesPerPage: [1],
+      selectedMatch: {
+        pageIndex: 0,
+        matchIndex: 0,
+      },
+      pageMatches: [[8]],
+      pageMatchesLength: [[4]],
+    });
+  });
+
   describe("custom matcher", () => {
     it("calls to the matcher with the right arguments", async () => {
       const QUERY = "Foo  bar";

test/unit/pdf_find_controller_spec.js

@@ -78,7 +78,7 @@ let DIACRITICS_EXCEPTION_STR; // Lazily initialized, see below.
 
 const DIACRITICS_REG_EXP = /\p{M}+/gu;
 const SPECIAL_CHARS_REG_EXP =
-  /([.*+?^${}()|[\]\\])|(\p{P})|(\s+)|(\p{M})|(\p{L})/gu;
+  /([*+^${}()|[\]\\])|(\p{P}+)|(\s+)|(\p{M})|(\p{L})/gu;
 const NOT_DIACRITIC_FROM_END_REG_EXP = /([^\p{M}])\p{M}*$/u;
 const NOT_DIACRITIC_FROM_START_REG_EXP = /^\p{M}*([^\p{M}])/u;
 
@@ -708,6 +708,18 @@ class PDFFindController {
   #convertToRegExpString(query, hasDiacritics) {
     const { matchDiacritics } = this.#state;
     let isUnicode = false;
+    const addExtraWhitespaces = (original, fixed) => {
+      if (original === query) {
+        return fixed;
+      }
+      if (query.startsWith(original)) {
+        return `${fixed}[ ]*`;
+      }
+      if (query.endsWith(original)) {
+        return `[ ]*${fixed}`;
+      }
+      return `[ ]*${fixed}[ ]*`;
+    };
     query = query.replaceAll(
       SPECIAL_CHARS_REG_EXP,
       (
@@ -723,11 +735,11 @@ class PDFFindController {
 
         if (p1) {
           // Escape characters like *+?... to not interfere with regexp syntax.
-          return `[ ]*\\${p1}[ ]*`;
+          return addExtraWhitespaces(p1, `\\${p1}`);
         }
         if (p2) {
-          // Allow whitespaces around punctuation signs.
-          return `[ ]*${p2}[ ]*`;
+          // Allow whitespaces around group of punctuation signs.
+          return addExtraWhitespaces(p2, p2.replaceAll(/[.?]/g, "\\$&"));
         }
         if (p3) {
           // Replace spaces by \s+ to be sure to match any spaces.