Merge pull request #1428 from lightpanda-io/parser_arena_pool

Use ArenaPool when parsing HTML and for TextDecoder (with finalizer)

src/browser/Page.zig

@@ -737,7 +737,10 @@ fn pageDoneCallback(ctx: *anyopaque) !void {
 
     switch (self._parse_state) {
         .html => |buf| {
-            var parser = Parser.init(self.arena, self.document.asNode(), self);
+            const parse_arena = try self.getArena(.{ .debug = "Page.parse" });
+            defer self.releaseArena(parse_arena);
+
+            var parser = Parser.init(parse_arena, self.document.asNode(), self);
             parser.parse(buf.items);
             self._script_manager.staticScriptsDone();
             if (self._script_manager.isDone()) {
@@ -749,7 +752,11 @@ fn pageDoneCallback(ctx: *anyopaque) !void {
         },
         .text => |*buf| {
             try buf.appendSlice(self.arena, "</pre></body></html>");
-            var parser = Parser.init(self.arena, self.document.asNode(), self);
+
+            const parse_arena = try self.getArena(.{ .debug = "Page.parse" });
+            defer self.releaseArena(parse_arena);
+
+            var parser = Parser.init(parse_arena, self.document.asNode(), self);
             parser.parse(buf.items);
             self.documentIsComplete();
         },

src/browser/webapi/DOMParser.zig

@@ -48,6 +48,9 @@ pub fn parseFromString(
         @"image/svg+xml",
     }, mime_type) orelse return error.NotSupported;
 
+    const arena = try page.getArena(.{ .debug = "DOMParser.parseFromString" });
+    defer page.releaseArena(arena);
+
     return switch (target_mime) {
         .@"text/html" => {
             // Create a new HTMLDocument
@@ -61,7 +64,7 @@ pub fn parseFromString(
             }
 
             // Parse HTML into the document
-            var parser = Parser.init(page.arena, doc.asNode(), page);
+            var parser = Parser.init(arena, doc.asNode(), page);
             parser.parse(normalized);
 
             if (parser.err) |pe| {
@@ -78,7 +81,7 @@ pub fn parseFromString(
 
             // Parse XML into XMLDocument.
             const doc_node = doc.asNode();
-            var parser = Parser.init(page.arena, doc_node, page);
+            var parser = Parser.init(arena, doc_node, page);
             parser.parseXML(html);
 
             if (parser.err) |pe| {

src/browser/webapi/Document.zig

@@ -648,7 +648,10 @@ pub fn write(self: *Document, text: []const []const u8, page: *Page) !void {
     page._parse_mode = .document_write;
     defer page._parse_mode = previous_parse_mode;
 
-    var parser = Parser.init(page.call_arena, fragment_node, page);
+    const arena = try page.getArena(.{ .debug = "Document.write" });
+    defer page.releaseArena(arena);
+
+    var parser = Parser.init(arena, fragment_node, page);
     parser.parseFragment(html);
 
     // Extract children from wrapper HTML element (html5ever wraps fragments)
@@ -661,7 +664,7 @@ pub fn write(self: *Document, text: []const []const u8, page: *Page) !void {
 
     var it = if (first.is(Element.Html.Html) == null) fragment_node.childrenIterator() else first.childrenIterator();
     while (it.next()) |child| {
-        try children_to_insert.append(page.call_arena, child);
+        try children_to_insert.append(arena, child);
     }
 
     if (children_to_insert.items.len == 0) {

src/browser/webapi/element/Html.zig

@@ -281,8 +281,11 @@ pub fn insertAdjacentHTML(
     });
     const doc_node = doc.asNode();
 
+    const arena = try page.getArena(.{ .debug = "HTML.insertAdjacentHTML" });
+    defer page.releaseArena(arena);
+
     const Parser = @import("../../parser/Parser.zig");
-    var parser = Parser.init(page.call_arena, doc_node, page);
+    var parser = Parser.init(arena, doc_node, page);
     parser.parse(html);
 
     // Check if there's parsing error.

src/browser/webapi/encoding/TextDecoder.zig

@@ -25,8 +25,9 @@ const Allocator = std.mem.Allocator;
 const TextDecoder = @This();
 
 _fatal: bool,
-_ignore_bom: bool,
+_page: *Page,
 _arena: Allocator,
+_ignore_bom: bool,
 _stream: std.ArrayListUnmanaged(u8),
 
 const Label = enum {
@@ -45,13 +46,23 @@ pub fn init(label_: ?[]const u8, opts_: ?InitOpts, page: *Page) !*TextDecoder {
         _ = std.meta.stringToEnum(Label, label) orelse return error.RangeError;
     }
 
+    const arena = try page.getArena(.{ .debug = "TextDecoder" });
+    errdefer page.releaseArena(arena);
+
     const opts = opts_ orelse InitOpts{};
-    return page._factory.create(TextDecoder{
+    const self = try arena.create(TextDecoder);
-        ._arena = page.arena,
+    self.* = .{
+        ._page = page,
+        ._arena = arena,
         ._stream = .empty,
         ._fatal = opts.fatal,
         ._ignore_bom = opts.ignoreBOM,
-    });
+    };
+    return self;
+}
+
+pub fn deinit(self: *TextDecoder, _: bool) void {
+    self._page.releaseArena(self._arena);
 }
 
 pub fn getEncoding(_: *const TextDecoder) []const u8 {
@@ -103,6 +114,8 @@ pub const JsApi = struct {
         pub const name = "TextDecoder";
         pub const prototype_chain = bridge.prototypeChain();
         pub var class_id: bridge.ClassId = undefined;
+        pub const weak = true;
+        pub const finalizer = bridge.finalizer(TextDecoder.deinit);
     };
 
     pub const constructor = bridge.constructor(TextDecoder.init, .{});