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Diffstat (limited to 'layout/xul/tree/nsTreeColumns.h')
| -rw-r--r-- | layout/xul/tree/nsTreeColumns.h | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/layout/xul/tree/nsTreeColumns.h b/layout/xul/tree/nsTreeColumns.h new file mode 100644 index 0000000000..677206a89d --- /dev/null +++ b/layout/xul/tree/nsTreeColumns.h @@ -0,0 +1,214 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef nsTreeColumns_h__ +#define nsTreeColumns_h__ + +#include "mozilla/Attributes.h" +#include "mozilla/RefPtr.h" +#include "nsCoord.h" +#include "nsCycleCollectionParticipant.h" +#include "nsQueryObject.h" +#include "nsWrapperCache.h" +#include "nsString.h" + +class nsAtom; +class nsTreeBodyFrame; +class nsTreeColumns; +class nsIFrame; +class nsIContent; +struct nsRect; + +namespace mozilla { +enum class StyleTextAlignKeyword : uint8_t; +using StyleTextAlign = StyleTextAlignKeyword; +class ErrorResult; +namespace dom { +class Element; +class XULTreeElement; +} // namespace dom +} // namespace mozilla + +#define NS_TREECOLUMN_IMPL_CID \ + { /* 02cd1963-4b5d-4a6c-9223-814d3ade93a3 */ \ + 0x02cd1963, 0x4b5d, 0x4a6c, { \ + 0x92, 0x23, 0x81, 0x4d, 0x3a, 0xde, 0x93, 0xa3 \ + } \ + } + +// This class is our column info. We use it to iterate our columns and to +// obtain information about each column. +class nsTreeColumn final : public nsISupports, public nsWrapperCache { + public: + nsTreeColumn(nsTreeColumns* aColumns, mozilla::dom::Element* aElement); + + NS_DECLARE_STATIC_IID_ACCESSOR(NS_TREECOLUMN_IMPL_CID) + + NS_DECL_CYCLE_COLLECTING_ISUPPORTS + NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(nsTreeColumn) + + // WebIDL + nsIContent* GetParentObject() const; + virtual JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + mozilla::dom::Element* Element(); + + nsTreeColumns* GetColumns() const { return mColumns; } + + int32_t GetX(mozilla::ErrorResult& aRv); + int32_t GetWidth(mozilla::ErrorResult& aRv); + + void GetId(nsAString& aId) const; + int32_t Index() const { return mIndex; } + + bool Primary() const { return mIsPrimary; } + bool Cycler() const { return mIsCycler; } + bool Editable() const { return mIsEditable; } + int16_t Type() const { return mType; } + + nsTreeColumn* GetNext() const { return mNext; } + nsTreeColumn* GetPrevious() const { return mPrevious; } + + already_AddRefed<nsTreeColumn> GetPreviousColumn(); + + void Invalidate(mozilla::ErrorResult& aRv); + + friend class nsTreeBodyFrame; + friend class nsTreeColumns; + + protected: + ~nsTreeColumn(); + nsIFrame* GetFrame(); + nsIFrame* GetFrame(nsTreeBodyFrame* aBodyFrame); + // Don't call this if GetWidthInTwips or GetRect fails + bool IsLastVisible(nsTreeBodyFrame* aBodyFrame); + + /** + * Returns a rect with x and width taken from the frame's rect and specified + * y and height. May fail in case there's no frame for the column. + */ + nsresult GetRect(nsTreeBodyFrame* aBodyFrame, nscoord aY, nscoord aHeight, + nsRect* aResult); + + nsresult GetXInTwips(nsTreeBodyFrame* aBodyFrame, nscoord* aResult); + nsresult GetWidthInTwips(nsTreeBodyFrame* aBodyFrame, nscoord* aResult); + + void SetColumns(nsTreeColumns* aColumns) { mColumns = aColumns; } + + public: + const nsAString& GetId() const { return mId; } + nsAtom* GetAtom() { return mAtom; } + int32_t GetIndex() { return mIndex; } + + protected: + bool IsPrimary() { return mIsPrimary; } + bool IsCycler() { return mIsCycler; } + bool IsEditable() { return mIsEditable; } + bool Overflow() { return mOverflow; } + + int16_t GetType() { return mType; } + + int8_t GetCropStyle() { return mCropStyle; } + mozilla::StyleTextAlign GetTextAlignment() { return mTextAlignment; } + + void SetNext(nsTreeColumn* aNext) { + NS_ASSERTION(!mNext, "already have a next sibling"); + mNext = aNext; + } + void SetPrevious(nsTreeColumn* aPrevious) { mPrevious = aPrevious; } + + private: + /** + * Non-null nsIContent for the associated <treecol> element. + */ + RefPtr<mozilla::dom::Element> mContent; + + nsTreeColumns* mColumns; + + nsString mId; + RefPtr<nsAtom> mAtom; + + int32_t mIndex; + + bool mIsPrimary; + bool mIsCycler; + bool mIsEditable; + bool mOverflow; + + int16_t mType; + + int8_t mCropStyle; + mozilla::StyleTextAlign mTextAlignment; + + RefPtr<nsTreeColumn> mNext; + nsTreeColumn* mPrevious; +}; + +NS_DEFINE_STATIC_IID_ACCESSOR(nsTreeColumn, NS_TREECOLUMN_IMPL_CID) + +class nsTreeColumns final : public nsISupports, public nsWrapperCache { + private: + ~nsTreeColumns(); + + public: + explicit nsTreeColumns(nsTreeBodyFrame* aTree); + + NS_DECL_CYCLE_COLLECTING_ISUPPORTS + NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(nsTreeColumns) + + nsIContent* GetParentObject() const; + virtual JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + // WebIDL + mozilla::dom::XULTreeElement* GetTree() const; + uint32_t Count(); + uint32_t Length() { return Count(); } + + nsTreeColumn* GetFirstColumn() { + EnsureColumns(); + return mFirstColumn; + } + nsTreeColumn* GetLastColumn(); + + nsTreeColumn* GetPrimaryColumn(); + nsTreeColumn* GetSortedColumn(); + nsTreeColumn* GetKeyColumn(); + + nsTreeColumn* GetColumnFor(mozilla::dom::Element* aElement); + + nsTreeColumn* IndexedGetter(uint32_t aIndex, bool& aFound); + nsTreeColumn* GetColumnAt(uint32_t aIndex); + nsTreeColumn* NamedGetter(const nsAString& aId, bool& aFound); + nsTreeColumn* GetNamedColumn(const nsAString& aId); + void GetSupportedNames(nsTArray<nsString>& aNames); + + void InvalidateColumns(); + + friend class nsTreeBodyFrame; + + protected: + void SetTree(nsTreeBodyFrame* aTree) { mTree = aTree; } + + // Builds our cache of column info. + void EnsureColumns(); + + private: + nsTreeBodyFrame* mTree; + + /** + * The first column in the list of columns. All of the columns are supposed + * to be "alive", i.e. have a frame. This is achieved by clearing the columns + * list each time a treecol changes size. + * + * XXX this means that new nsTreeColumn objects are unnecessarily created + * for untouched columns. + */ + RefPtr<nsTreeColumn> mFirstColumn; +}; + +#endif // nsTreeColumns_h__ |