From cd53d2604cb946879f2343c10d3f1325194500e9 Mon Sep 17 00:00:00 2001
From: Pierre Tachoire <pierre@tch.re>
Date: Tue, 3 Oct 2023 16:46:35 +0200
Subject: [PATCH] netsurf: add a parser from string wrapper

---
 src/netsurf.zig                  | 14 ++++++---
 vendor/netsurf/wrapper/wrapper.c | 50 ++++++++++++++++++++++++++++++++
 vendor/netsurf/wrapper/wrapper.h |  1 +
 3 files changed, 61 insertions(+), 4 deletions(-)

diff --git a/src/netsurf.zig b/src/netsurf.zig
index 8843de9e..9c634cd6 100644
--- a/src/netsurf.zig
+++ b/src/netsurf.zig
@@ -553,11 +553,17 @@ fn documentHTMLVtable(doc_html: *DocumentHTML) c.dom_html_document_vtable {
     return getVtable(c.dom_html_document_vtable, DocumentHTML, doc_html);
 }
 
-pub fn documentHTMLParse(filename: []const u8) *DocumentHTML {
-    var f: []u8 = @constCast(filename);
-    const doc = c.wr_create_doc_dom_from_file(f.ptr);
+pub fn documentHTMLParse(allocator: std.mem.Allocator, filename: []const u8) !*DocumentHTML {
+    var file = try std.fs.cwd().openFile(filename, .{});
+    defer file.close();
+
+    const file_size = try file.getEndPos();
+    const html = try file.readToEndAlloc(allocator, file_size);
+    defer allocator.free(html);
+
+    const doc = c.wr_create_doc_dom_from_string(html.ptr);
     if (doc == null) {
-        @panic("error parser");
+        return error.ParserError;
     }
     return @as(*DocumentHTML, @ptrCast(doc.?));
 }
diff --git a/vendor/netsurf/wrapper/wrapper.c b/vendor/netsurf/wrapper/wrapper.c
index 1f7c14bd..0a9448b7 100644
--- a/vendor/netsurf/wrapper/wrapper.c
+++ b/vendor/netsurf/wrapper/wrapper.c
@@ -1,8 +1,58 @@
 #include <stdio.h>
+#include <string.h>
 
 #include <dom/dom.h>
 #include <dom/bindings/hubbub/parser.h>
 
+/**
+ * Generate a LibDOM document DOM from an HTML string
+ *
+ * \param string The HTML string
+ * \return  pointer to DOM document, or NULL on error
+ */
+dom_document *wr_create_doc_dom_from_string(char *html)
+{
+	dom_hubbub_parser *parser = NULL;
+	dom_hubbub_error error;
+	dom_hubbub_parser_params params;
+	dom_document *doc;
+
+	params.enc = NULL;
+	params.fix_enc = true;
+	params.enable_script = false;
+	params.msg = NULL;
+	params.script = NULL;
+	params.ctx = NULL;
+	params.daf = NULL;
+
+	/* Create Hubbub parser */
+	error = dom_hubbub_parser_create(&params, &parser, &doc);
+	if (error != DOM_HUBBUB_OK) {
+		printf("Can't create Hubbub Parser\n");
+		return NULL;
+	}
+
+	error = dom_hubbub_parser_parse_chunk(parser, html, strlen(html));
+	if (error != DOM_HUBBUB_OK) {
+		dom_hubbub_parser_destroy(parser);
+		printf("Parsing errors occur\n");
+		return NULL;
+	}
+
+	/* Done parsing file */
+	error = dom_hubbub_parser_completed(parser);
+	if (error != DOM_HUBBUB_OK) {
+		dom_hubbub_parser_destroy(parser);
+		printf("Parsing error when construct DOM\n");
+		return NULL;
+	}
+
+	/* Finished with parser */
+	dom_hubbub_parser_destroy(parser);
+
+	return doc;
+}
+
 /**
  * Generate a LibDOM document DOM from an HTML file
  *
diff --git a/vendor/netsurf/wrapper/wrapper.h b/vendor/netsurf/wrapper/wrapper.h
index 05904ef1..ba630a70 100644
--- a/vendor/netsurf/wrapper/wrapper.h
+++ b/vendor/netsurf/wrapper/wrapper.h
@@ -3,6 +3,7 @@
 
 #include <dom/dom.h>
 
+dom_document *wr_create_doc_dom_from_string(char *html);
 dom_document *wr_create_doc_dom_from_file(char *filename);
 
 #endif	/* wrapper_dom_h_ */