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dom: document first element can be null

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This commit is contained in:
Pierre Tachoire
2023-12-13 13:12:01 +01:00
parent edff9f7444
commit 82c836c80d
3 changed files with 45 additions and 31 deletions
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29
src/dom/html_collection.zig
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@@ -57,7 +57,7 @@ pub const MatchByTagName = struct {
pub fn HTMLCollectionByTagName(
alloc: std.mem.Allocator,
root: *parser.Node,
root: ?*parser.Node,
tag_name: []const u8,
include_root: bool,
) !HTMLCollection {
@@ -101,7 +101,7 @@ pub const MatchByClassName = struct {
pub fn HTMLCollectionByClassName(
alloc: std.mem.Allocator,
root: *parser.Node,
root: ?*parser.Node,
classNames: []const u8,
include_root: bool,
) !HTMLCollection {
@@ -116,7 +116,7 @@ pub fn HTMLCollectionByClassName(
}
pub fn HTMLCollectionChildren(
root: *parser.Node,
root: ?*parser.Node,
include_root: bool,
) !HTMLCollection {
return HTMLCollection{
@@ -219,7 +219,7 @@ pub const HTMLCollection = struct {
matcher: Matcher,
walker: Walker,
root: *parser.Node,
root: ?*parser.Node,
// By default the HTMLCollection walk on the root's descendant only.
// But on somes cases, like for dom document, we want to walk over the root
@@ -232,17 +232,21 @@ pub const HTMLCollection = struct {
// start returns the first node to walk on.
fn start(self: HTMLCollection) !?*parser.Node {
if (self.root == null) return null;
if (self.include_root) {
return self.root;
return self.root.?;
}
return try self.walker.get_next(self.root, null);
return try self.walker.get_next(self.root.?, null);
}
/// get_length computes the collection's length dynamically according to
/// the current root structure.
// TODO: nodes retrieved must be de-referenced.
pub fn get_length(self: *HTMLCollection) !u32 {
if (self.root == null) return 0;
var len: u32 = 0;
var node = try self.start() orelse return 0;
@@ -253,13 +257,15 @@ pub const HTMLCollection = struct {
}
}
node = try self.walker.get_next(self.root, node) orelse break;
node = try self.walker.get_next(self.root.?, node) orelse break;
}
return len;
}
pub fn _item(self: *HTMLCollection, index: u32) !?Union {
if (self.root == null) return null;
var i: u32 = 0;
var node: *parser.Node = undefined;
@@ -288,16 +294,15 @@ pub const HTMLCollection = struct {
}
}
node = try self.walker.get_next(self.root, node) orelse break;
node = try self.walker.get_next(self.root.?, node) orelse break;
}
return null;
}
pub fn _namedItem(self: *HTMLCollection, name: []const u8) !?Union {
if (name.len == 0) {
return null;
}
if (self.root == null) return null;
if (name.len == 0) return null;
var node = try self.start() orelse return null;
@@ -320,7 +325,7 @@ pub const HTMLCollection = struct {
}
}
node = try self.walker.get_next(self.root, node) orelse break;
node = try self.walker.get_next(self.root.?, node) orelse break;
}
return null;