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diff mupdf-source/thirdparty/gumbo-parser/examples/find_links.cc @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/gumbo-parser/examples/find_links.cc	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,66 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Author: jdtang@google.com (Jonathan Tang)
+//
+// Finds the URLs of all links in the page.
+
+#include <stdlib.h>
+
+#include <fstream>
+#include <iostream>
+#include <string>
+
+#include "gumbo.h"
+
+static void search_for_links(GumboNode* node) {
+  if (node->type != GUMBO_NODE_ELEMENT) {
+    return;
+  }
+  GumboAttribute* href;
+  if (node->v.element.tag == GUMBO_TAG_A &&
+      (href = gumbo_get_attribute(&node->v.element.attributes, "href"))) {
+    std::cout << href->value << std::endl;
+  }
+
+  GumboVector* children = &node->v.element.children;
+  for (unsigned int i = 0; i < children->length; ++i) {
+    search_for_links(static_cast<GumboNode*>(children->data[i]));
+  }
+}
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    std::cout << "Usage: find_links <html filename>.\n";
+    exit(EXIT_FAILURE);
+  }
+  const char* filename = argv[1];
+
+  std::ifstream in(filename, std::ios::in | std::ios::binary);
+  if (!in) {
+    std::cout << "File " << filename << " not found!\n";
+    exit(EXIT_FAILURE);
+  }
+
+  std::string contents;
+  in.seekg(0, std::ios::end);
+  contents.resize(in.tellg());
+  in.seekg(0, std::ios::beg);
+  in.read(&contents[0], contents.size());
+  in.close();
+
+  GumboOutput* output = gumbo_parse(contents.c_str());
+  search_for_links(output->root);
+  gumbo_destroy_output(&kGumboDefaultOptions, output);
+}