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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/controls/link_fragment.h"
#include <string>
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/views/controls/focus_ring.h"
#include "ui/views/controls/link.h"
#include "ui/views/style/typography.h"
#include "ui/views/view_utils.h"
namespace views {
LinkFragment::LinkFragment(const std::u16string& title,
int text_context,
int text_style,
LinkFragment* other_fragment)
: Link(title, text_context, text_style),
prev_fragment_(this),
next_fragment_(this) {
// Connect to the previous fragment if it exists.
if (other_fragment) {
Connect(other_fragment);
}
views::FocusRing::Install(this);
views::FocusRing::Get(this)->SetHasFocusPredicate(
base::BindRepeating([](const View* view) {
const auto* v = views::AsViewClass<LinkFragment>(view);
CHECK(v);
return InvokeOnFragments(&LinkFragment::HasFocus, v);
}));
}
LinkFragment::~LinkFragment() {
Disconnect();
}
void LinkFragment::Connect(LinkFragment* other_fragment) {
DCHECK(prev_fragment_ == this);
DCHECK(next_fragment_ == this);
DCHECK(other_fragment);
next_fragment_ = other_fragment->next_fragment_;
other_fragment->next_fragment_->prev_fragment_ = this;
prev_fragment_ = other_fragment;
other_fragment->next_fragment_ = this;
}
void LinkFragment::Disconnect() {
DCHECK((prev_fragment_ != this) == (next_fragment_ != this));
if (prev_fragment_ != this) {
prev_fragment_->next_fragment_ = next_fragment_;
next_fragment_->prev_fragment_ = prev_fragment_;
}
}
bool LinkFragment::IsUnderlined() const {
return GetEnabled() &&
(HasFocus() || IsMouseHovered() || GetForceUnderline());
}
void LinkFragment::RecalculateFont() {
// Check whether any link fragment should be underlined.
const bool should_be_underlined =
InvokeOnFragments(&LinkFragment::IsUnderlined, this);
InvokeOnFragments(
[should_be_underlined](LinkFragment* fragment) {
// If the style differs from the current one, update.
if (!!(fragment->font_list().GetFontStyle() & gfx::Font::UNDERLINE) !=
should_be_underlined) {
const int style = fragment->font_list().GetFontStyle();
const int intended_style = should_be_underlined
? (style | gfx::Font::UNDERLINE)
: (style & ~gfx::Font::UNDERLINE);
fragment->Label::SetFontList(
fragment->font_list().DeriveWithStyle(intended_style));
fragment->SchedulePaint();
}
views::FocusRing::Get(fragment)->SchedulePaint();
return false;
},
this);
}
BEGIN_METADATA(LinkFragment)
END_METADATA
} // namespace views
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