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axtree: build consistent tree

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This commit is contained in:
Pierre Tachoire
2025-12-05 12:38:30 +01:00
parent ece3597c6f
commit b3b43c873c
1 changed files with 32 additions and 39 deletions
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71
src/cdp/AXNode.zig
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@@ -49,31 +49,13 @@ pub const Writer = struct {
fn toJSON(self: *const Writer, node: *const Node, w: anytype) !void {
try w.beginArray();
if (try self.writeNode(node, w)) {
// skip children
try w.endArray();
return;
}
// special case: if the node is the document, walk starts from body.
const start = blk: {
if (parser.nodeType(node._node) != .document) {
break :blk node._node;
}
const doc = parser.documentHTMLToDocument(@ptrCast(node._node));
std.debug.assert(doc.is_html);
// find <body> tag
const list = try parser.documentGetElementsByTagName(doc, "body");
break :blk parser.nodeListItem(list, 0) orelse node._node;
};
try self.writeNode(node, w);
const walker = Walker{};
var next: ?*parser.Node = null;
var skip_children = false;
while (true) {
next = try walker.get_next(start, next, .{ .skip_children = skip_children }) orelse break;
next = try walker.get_next(node._node, next, .{ .skip_children = skip_children }) orelse break;
if (parser.nodeType(next.?) != .element) {
skip_children = true;
@@ -81,7 +63,13 @@ pub const Writer = struct {
}
const n = try self.registry.register(next.?);
skip_children = try self.writeNode(n, w);
try self.writeNode(n, w);
const tag = try parser.elementTag(@ptrCast(next.?));
skip_children = switch (tag) {
.head => true,
else => false,
};
}
try w.endArray();
@@ -206,18 +194,22 @@ pub const Writer = struct {
}
// write a node. returns true if children must be skipped.
fn writeNode(self: *const Writer, node: *const Node, w: anytype) !bool {
fn writeNode(self: *const Writer, node: *const Node, w: anytype) !void {
try w.beginObject();
const axn = try AXNode.fromNode(node._node);
try w.objectField("nodeId");
try w.write(node.id);
try w.objectField("role");
try self.writeAXValue(.{ .type = .role, .value = .{ .string = try axn.getRole() } }, w);
const ignore = try axn.isIgnore();
try w.objectField("ignored");
try w.write(ignore);
if (ignore) {
// Ignore reasons
try w.objectField("ignored_reasons");
try w.beginArray();
try w.beginObject();
@@ -227,12 +219,8 @@ pub const Writer = struct {
try self.writeAXValue(.{ .type = .boolean, .value = .{ .boolean = true } }, w);
try w.endObject();
try w.endArray();
}
try w.objectField("role");
try self.writeAXValue(.{ .type = .role, .value = .{ .string = try axn.getRole() } }, w);
if (!ignore) {
} else {
// Name
try w.objectField("name");
try w.beginObject();
try w.objectField("type");
@@ -243,10 +231,17 @@ pub const Writer = struct {
try self.writeAXSource(s, w);
}
try w.endObject();
// Properties
try w.objectField("properties");
try w.beginArray();
try self.writeAXProperties(axn, w);
try w.endArray();
}
const n = axn._node;
// Parent
if (parser.nodeParentNode(n)) |p| {
const parent_node = try self.registry.register(p);
try w.objectField("parentId");
@@ -265,21 +260,17 @@ pub const Writer = struct {
defer i += 1;
const child = (parser.nodeListItem(child_nodes, @intCast(i))) orelse break;
// TODO ignore some of them?
// ignore non-elements
if (parser.nodeType(child) != .element) {
continue;
}
const child_node = try registry.register(child);
try w.write(child_node.id);
}
try w.endArray();
// Properties
try w.objectField("properties");
try w.beginArray();
try self.writeAXProperties(axn, w);
try w.endArray();
try w.endObject();
return false;
}
};
@@ -527,8 +518,8 @@ pub const AXRole = enum(u8) {
.dfn => .term,
// Document Structure
.html => .document,
.body => .document,
.html => .none,
.body => .none,
// Deprecated/Obsolete Elements
.marquee => .marquee,
@@ -697,6 +688,8 @@ fn isIgnore(self: AXNode) !bool {
.datalist,
.col,
.colgroup,
.html,
.body,
=> return true,
.img => {
// Check for empty decorative images