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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "third_party/blink/renderer/core/html/forms/date_time_symbolic_field_element.h"
#include "third_party/blink/renderer/core/events/keyboard_event.h"
#include "third_party/blink/renderer/platform/fonts/font.h"
#include "third_party/blink/renderer/platform/text/text_break_iterator.h"
#include "third_party/blink/renderer/platform/text/text_run.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
#include "third_party/blink/renderer/platform/wtf/text/unicode.h"
namespace blink {
static AtomicString MakeVisibleEmptyValue(const Vector<String>& symbols) {
unsigned maximum_length = 0;
for (unsigned index = 0; index < symbols.size(); ++index)
maximum_length =
std::max(maximum_length, NumGraphemeClusters(symbols[index]));
StringBuilder builder;
builder.ReserveCapacity(maximum_length);
for (unsigned length = 0; length < maximum_length; ++length)
builder.Append('-');
return builder.ToAtomicString();
}
DateTimeSymbolicFieldElement::DateTimeSymbolicFieldElement(
Document& document,
FieldOwner& field_owner,
const Vector<String>& symbols,
int minimum,
int maximum)
: DateTimeFieldElement(document, field_owner),
symbols_(symbols),
visible_empty_value_(MakeVisibleEmptyValue(symbols)),
selected_index_(-1),
type_ahead_(this),
minimum_index_(minimum),
maximum_index_(maximum) {
DCHECK(!symbols.IsEmpty());
DCHECK_GE(minimum_index_, 0);
SECURITY_DCHECK(maximum_index_ < static_cast<int>(symbols_.size()));
DCHECK_LE(minimum_index_, maximum_index_);
}
float DateTimeSymbolicFieldElement::MaximumWidth(const ComputedStyle& style) {
float maximum_width = ComputeTextWidth(style, VisibleEmptyValue());
for (unsigned index = 0; index < symbols_.size(); ++index)
maximum_width =
std::max(maximum_width, ComputeTextWidth(style, symbols_[index]));
return maximum_width + DateTimeFieldElement::MaximumWidth(style);
}
void DateTimeSymbolicFieldElement::HandleKeyboardEvent(
KeyboardEvent* keyboard_event) {
if (keyboard_event->type() != EventTypeNames::keypress)
return;
const UChar char_code = WTF::Unicode::ToLower(keyboard_event->charCode());
if (char_code < ' ')
return;
keyboard_event->SetDefaultHandled();
int index = type_ahead_.HandleEvent(
keyboard_event, TypeAhead::kMatchPrefix | TypeAhead::kCycleFirstChar |
TypeAhead::kMatchIndex);
if (index < 0)
return;
SetValueAsInteger(index, kDispatchEvent);
}
bool DateTimeSymbolicFieldElement::HasValue() const {
return selected_index_ >= 0;
}
void DateTimeSymbolicFieldElement::Initialize(const AtomicString& pseudo,
const String& ax_help_text) {
// The minimum and maximum below are exposed to users, and 1-based numbers
// are natural for symbolic fields. For example, the minimum value of a
// month field should be 1, not 0.
DateTimeFieldElement::Initialize(pseudo, ax_help_text, minimum_index_ + 1,
maximum_index_ + 1);
}
void DateTimeSymbolicFieldElement::SetEmptyValue(EventBehavior event_behavior) {
if (IsDisabled())
return;
selected_index_ = kInvalidIndex;
UpdateVisibleValue(event_behavior);
}
void DateTimeSymbolicFieldElement::SetValueAsInteger(
int new_selected_index,
EventBehavior event_behavior) {
selected_index_ = std::max(
0, std::min(new_selected_index, static_cast<int>(symbols_.size() - 1)));
UpdateVisibleValue(event_behavior);
}
void DateTimeSymbolicFieldElement::StepDown() {
if (HasValue()) {
if (!IndexIsInRange(--selected_index_))
selected_index_ = maximum_index_;
} else {
selected_index_ = maximum_index_;
}
UpdateVisibleValue(kDispatchEvent);
}
void DateTimeSymbolicFieldElement::StepUp() {
if (HasValue()) {
if (!IndexIsInRange(++selected_index_))
selected_index_ = minimum_index_;
} else {
selected_index_ = minimum_index_;
}
UpdateVisibleValue(kDispatchEvent);
}
String DateTimeSymbolicFieldElement::Value() const {
return HasValue() ? symbols_[selected_index_] : g_empty_string;
}
int DateTimeSymbolicFieldElement::ValueAsInteger() const {
return selected_index_;
}
int DateTimeSymbolicFieldElement::ValueForARIAValueNow() const {
// Synchronize with minimum/maximum adjustment in initialize().
return selected_index_ + 1;
}
String DateTimeSymbolicFieldElement::VisibleEmptyValue() const {
return visible_empty_value_;
}
String DateTimeSymbolicFieldElement::VisibleValue() const {
return HasValue() ? symbols_[selected_index_] : VisibleEmptyValue();
}
int DateTimeSymbolicFieldElement::IndexOfSelectedOption() const {
return selected_index_;
}
int DateTimeSymbolicFieldElement::OptionCount() const {
return symbols_.size();
}
String DateTimeSymbolicFieldElement::OptionAtIndex(int index) const {
return symbols_[index];
}
} // namespace blink
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