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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/css/properties/longhands/cursor.h"
#include "third_party/blink/renderer/core/css/css_cursor_image_value.h"
#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css/parser/css_parser_context.h"
#include "third_party/blink/renderer/core/css/parser/css_parser_mode.h"
#include "third_party/blink/renderer/core/css/parser/css_property_parser_helpers.h"
#include "third_party/blink/renderer/core/frame/use_counter.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
namespace blink {
namespace css_longhand {
const CSSValue* Cursor::ParseSingleValue(CSSParserTokenRange& range,
const CSSParserContext& context,
const CSSParserLocalContext&) const {
bool in_quirks_mode = IsQuirksModeBehavior(context.Mode());
CSSValueList* list = nullptr;
while (
CSSValue* image = css_property_parser_helpers::ConsumeImage(
range, &context,
css_property_parser_helpers::ConsumeGeneratedImagePolicy::kForbid)) {
double num;
IntPoint hot_spot(-1, -1);
bool hot_spot_specified = false;
if (css_property_parser_helpers::ConsumeNumberRaw(range, num)) {
hot_spot.SetX(clampTo<int>(num));
if (!css_property_parser_helpers::ConsumeNumberRaw(range, num))
return nullptr;
hot_spot.SetY(clampTo<int>(num));
hot_spot_specified = true;
}
if (!list)
list = CSSValueList::CreateCommaSeparated();
list->Append(*cssvalue::CSSCursorImageValue::Create(
*image, hot_spot_specified, hot_spot));
if (!css_property_parser_helpers::ConsumeCommaIncludingWhitespace(range))
return nullptr;
}
CSSValueID id = range.Peek().Id();
if (!range.AtEnd()) {
if (id == CSSValueWebkitZoomIn)
context.Count(WebFeature::kPrefixedCursorZoomIn);
else if (id == CSSValueWebkitZoomOut)
context.Count(WebFeature::kPrefixedCursorZoomOut);
else if (id == CSSValueWebkitGrab)
context.Count(WebFeature::kPrefixedCursorGrab);
else if (id == CSSValueWebkitGrabbing)
context.Count(WebFeature::kPrefixedCursorGrabbing);
}
CSSValue* cursor_type = nullptr;
if (id == CSSValueHand) {
if (!in_quirks_mode) // Non-standard behavior
return nullptr;
cursor_type = CSSIdentifierValue::Create(CSSValuePointer);
range.ConsumeIncludingWhitespace();
} else if ((id >= CSSValueAuto && id <= CSSValueWebkitZoomOut) ||
id == CSSValueCopy || id == CSSValueNone) {
cursor_type = css_property_parser_helpers::ConsumeIdent(range);
} else {
return nullptr;
}
if (!list)
return cursor_type;
list->Append(*cursor_type);
return list;
}
const CSSValue* Cursor::CSSValueFromComputedStyleInternal(
const ComputedStyle& style,
const SVGComputedStyle&,
const LayoutObject*,
Node* styled_node,
bool allow_visited_style) const {
CSSValueList* list = nullptr;
CursorList* cursors = style.Cursors();
if (cursors && cursors->size() > 0) {
list = CSSValueList::CreateCommaSeparated();
for (const CursorData& cursor : *cursors) {
if (StyleImage* image = cursor.GetImage()) {
list->Append(*cssvalue::CSSCursorImageValue::Create(
*image->ComputedCSSValue(), cursor.HotSpotSpecified(),
cursor.HotSpot()));
}
}
}
CSSValue* value = CSSIdentifierValue::Create(style.Cursor());
if (list) {
list->Append(*value);
return list;
}
return value;
}
void Cursor::ApplyInitial(StyleResolverState& state) const {
state.Style()->ClearCursorList();
state.Style()->SetCursor(ComputedStyleInitialValues::InitialCursor());
}
void Cursor::ApplyInherit(StyleResolverState& state) const {
state.Style()->SetCursor(state.ParentStyle()->Cursor());
state.Style()->SetCursorList(state.ParentStyle()->Cursors());
}
void Cursor::ApplyValue(StyleResolverState& state,
const CSSValue& value) const {
state.Style()->ClearCursorList();
if (value.IsValueList()) {
state.Style()->SetCursor(ECursor::kAuto);
for (const auto& item : ToCSSValueList(value)) {
if (item->IsCursorImageValue()) {
const cssvalue::CSSCursorImageValue& cursor =
cssvalue::ToCSSCursorImageValue(*item);
const CSSValue& image = cursor.ImageValue();
state.Style()->AddCursor(state.GetStyleImage(CSSPropertyCursor, image),
cursor.HotSpotSpecified(), cursor.HotSpot());
} else {
state.Style()->SetCursor(
ToCSSIdentifierValue(*item).ConvertTo<ECursor>());
}
}
} else {
state.Style()->SetCursor(ToCSSIdentifierValue(value).ConvertTo<ECursor>());
}
}
} // namespace css_longhand
} // namespace blink
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