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6279258383
Since safe area insets uses on content, we need send it from chrome process to content process. SafeAreaInsetsChanged will be called per window position/size change (Next patch is Android implementation for it), we have to calculate safe area insets on widget/window per change. Current implementation is that this value is top level document only like Blink since https://github.com/w3c/csswg-drafts/issues/4670 isn't resolved yet. Differential Revision: https://phabricator.services.mozilla.com/D55084 --HG-- extra : moz-landing-system : lando
568 lines
21 KiB
C++
568 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsView_h__
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#define nsView_h__
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#include "nsCoord.h"
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#include "nsRect.h"
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#include "nsPoint.h"
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#include "nsRegion.h"
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#include "nsCRT.h"
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#include "nsCOMPtr.h"
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#include "nsWidgetInitData.h" // for nsWindowType
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#include "nsIWidgetListener.h"
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#include "Units.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/EventForwards.h"
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class nsViewManager;
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class nsIWidget;
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class nsIFrame;
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namespace mozilla {
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class PresShell;
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} // namespace mozilla
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/**
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* nsView's serve two main purposes: 1) a bridge between nsIFrame's and
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* nsIWidget's, 2) linking the frame tree of a(n) (in-process) subdocument with
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* its parent document frame tree. Historically views were used for more things,
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* but their role has been reduced, and could be reduced to nothing in the
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* future (bug 337801 tracks removing views). Views are generally associated
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* with a frame. A view that does not have a frame is called an anonymous view.
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* Some frames also have associated widgets (think os level windows). If a frame
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* has a widget it must also have a view, but not all frames with views will
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* have widgets.
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*
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* Only five types of frames can have a view: root frames (ViewportFrame),
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* subdocument frames (nsSubDocumentFrame), plugin frames (nsPluginFrame),
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* menu popup frames (nsMenuPopupFrame), and list control frames
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* (nsListControlFrame). Root frames and subdocument frames have views to link
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* the two documents together (the frame trees do not link up otherwise).
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* Plugin frames, menu popup frames, and list control frames have views because
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* they (sometimes) need to create widgets (although plugins with widgets might
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* be going away/gone?). Menu popup frames handles xul popups, which is anything
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* where we need content to go over top the main window at an os level. List
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* control frames handle select popups/dropdowns in non-e10s mode.
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*
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* The term "root view" refers to the root view of a document. Just like root
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* frames, root views can have parent views. Only the root view of the root
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* document in the process will not have a parent.
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*
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* All views are created by their frames except root views. Root views are
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* special. Root views are created in nsDocumentViewer::MakeWindow before the
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* root frame is created, so the root view will not have a frame very early in
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* document creation.
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*
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* Subdocument frames and plugin frames have an anonymous (no frame associated
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* with it) inner view that is a child of their "outer" view. On a plugin frame
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* with a widget the inner view would be associated with the widget (as opposed
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* to the outer view).
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*
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* On a subdocument frame the inner view serves as the parent of the
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* root view of the subdocument. The outer and inner view of the subdocument
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* frame belong to the subdocument frame and hence to the parent document. The
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* root view of the subdocument belongs to the subdocument.
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* nsLayoutUtils::GetCrossDocParentFrame and nsPresContext::GetParentPresContext
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* depend on this view structure and are the main way that we traverse across
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* the document boundary in layout.
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*
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* When the load of a new document is started in the subdocument, the creation
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* of the new subdocument and destruction of the old subdocument are not
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* linked. (This creation and destruction is handled in nsDocumentViewer.cpp.)
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* This means that the old and new document will both exist at the same time
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* during the loading of the new document. During this period the inner view of
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* the subdocument parent will be the parent of two root views. This means that
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* during this period there is a choice for which subdocument we draw,
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* nsSubDocumentFrame::GetSubdocumentPresShellForPainting is what makes that
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* choice. Note that this might not be a totally free choice, ie there might be
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* hidden dependencies and bugs if the way we choose is changed.
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*
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* One thing that is special about the root view of a chrome window is that
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* instead of creating a widget for the view, they can "attach" to the
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* existing widget that was created by appshell code or something else. (see
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* nsDocumentViewer::ShouldAttachToTopLevel)
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*/
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// Enumerated type to indicate the visibility of a layer.
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// hide - the layer is not shown.
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// show - the layer is shown irrespective of the visibility of
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// the layer's parent.
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enum nsViewVisibility {
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nsViewVisibility_kHide = 0,
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nsViewVisibility_kShow = 1
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};
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// Public view flags
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// Indicates that the view is using auto z-indexing
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#define NS_VIEW_FLAG_AUTO_ZINDEX 0x0004
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// Indicates that the view is a floating view.
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#define NS_VIEW_FLAG_FLOATING 0x0008
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//----------------------------------------------------------------------
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/**
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* View interface
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*
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* Views are NOT reference counted. Use the Destroy() member function to
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* destroy a view.
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*
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* The lifetime of the view hierarchy is bounded by the lifetime of the
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* view manager that owns the views.
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*
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* Most of the methods here are read-only. To set the corresponding properties
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* of a view, go through nsViewManager.
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*/
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class nsView final : public nsIWidgetListener {
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public:
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friend class nsViewManager;
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typedef mozilla::LayoutDeviceIntRect LayoutDeviceIntRect;
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typedef mozilla::LayoutDeviceIntRegion LayoutDeviceIntRegion;
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void operator delete(void* ptr) { ::operator delete(ptr); }
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/**
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* Get the view manager which "owns" the view.
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* This method might require some expensive traversal work in the future. If
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* you can get the view manager from somewhere else, do that instead.
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* @result the view manager
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*/
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nsViewManager* GetViewManager() const { return mViewManager; }
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/**
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* Find the view for the given widget, if there is one.
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* @return the view the widget belongs to, or null if the widget doesn't
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* belong to any view.
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*/
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static nsView* GetViewFor(nsIWidget* aWidget);
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/**
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* Destroy the view.
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*
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* The view destroys its child views, and destroys and releases its
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* widget (if it has one).
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*
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* Also informs the view manager that the view is destroyed by calling
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* SetRootView(NULL) if the view is the root view and calling RemoveChild()
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* otherwise.
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*/
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void Destroy();
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/**
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* Called to get the position of a view.
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* The specified coordinates are relative to the parent view's origin, but
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* are in appunits of this.
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* This is the (0, 0) origin of the coordinate space established by this view.
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* @param x out parameter for x position
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* @param y out parameter for y position
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*/
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nsPoint GetPosition() const {
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NS_ASSERTION(!IsRoot() || (mPosX == 0 && mPosY == 0),
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"root views should always have explicit position of (0,0)");
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return nsPoint(mPosX, mPosY);
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}
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/**
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* Called to get the dimensions and position of the view's bounds.
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* The view's bounds (x,y) are relative to the origin of the parent view, but
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* are in appunits of this.
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* The view's bounds (x,y) might not be the same as the view's position,
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* if the view has content above or to the left of its origin.
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* @param aBounds out parameter for bounds
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*/
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nsRect GetBounds() const { return mDimBounds; }
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/**
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* The bounds of this view relative to this view. So this is the same as
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* GetBounds except this is relative to this view instead of the parent view.
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*/
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nsRect GetDimensions() const {
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nsRect r = mDimBounds;
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r.MoveBy(-mPosX, -mPosY);
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return r;
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}
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/**
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* Get the offset between the coordinate systems of |this| and aOther.
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* Adding the return value to a point in the coordinate system of |this|
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* will transform the point to the coordinate system of aOther.
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*
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* The offset is expressed in appunits of |this|. So if you are getting the
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* offset between views in different documents that might have different
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* appunits per devpixel ratios you need to be careful how you use the
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* result.
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*
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* If aOther is null, this will return the offset of |this| from the
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* root of the viewmanager tree.
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*
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* This function is fastest when aOther is an ancestor of |this|.
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*
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* NOTE: this actually returns the offset from aOther to |this|, but
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* that offset is added to transform _coordinates_ from |this| to aOther.
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*/
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nsPoint GetOffsetTo(const nsView* aOther) const;
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/**
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* Get the offset between the origin of |this| and the origin of aWidget.
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* Adding the return value to a point in the coordinate system of |this|
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* will transform the point to the coordinate system of aWidget.
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*
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* The offset is expressed in appunits of |this|.
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*/
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nsPoint GetOffsetToWidget(nsIWidget* aWidget) const;
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/**
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* Takes a point aPt that is in the coordinate system of |this|'s parent view
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* and converts it to be in the coordinate system of |this| taking into
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* account the offset and any app unit per dev pixel ratio differences.
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*/
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nsPoint ConvertFromParentCoords(nsPoint aPt) const;
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/**
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* Called to query the visibility state of a view.
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* @result current visibility state
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*/
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nsViewVisibility GetVisibility() const { return mVis; }
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/**
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* Get whether the view "floats" above all other views,
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* which tells the compositor not to consider higher views in
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* the view hierarchy that would geometrically intersect with
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* this view. This is a hack, but it fixes some problems with
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* views that need to be drawn in front of all other views.
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* @result true if the view floats, false otherwise.
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*/
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bool GetFloating() const { return (mVFlags & NS_VIEW_FLAG_FLOATING) != 0; }
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/**
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* Called to query the parent of the view.
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* @result view's parent
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*/
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nsView* GetParent() const { return mParent; }
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/**
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* The view's first child is the child which is earliest in document order.
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* @result first child
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*/
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nsView* GetFirstChild() const { return mFirstChild; }
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/**
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* Called to query the next sibling of the view.
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* @result view's next sibling
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*/
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nsView* GetNextSibling() const { return mNextSibling; }
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/**
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* Set the view's frame.
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*/
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void SetFrame(nsIFrame* aRootFrame) { mFrame = aRootFrame; }
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/**
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* Retrieve the view's frame.
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*/
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nsIFrame* GetFrame() const { return mFrame; }
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/**
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* Get the nearest widget in this view or a parent of this view and
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* the offset from the widget's origin to this view's origin
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* @param aOffset - if non-null the offset from this view's origin to the
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* widget's origin (usually positive) expressed in appunits of this will be
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* returned in aOffset.
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* @return the widget closest to this view; can be null because some view
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* trees don't have widgets at all (e.g., printing), but if any view in the
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* view tree has a widget, then it's safe to assume this will not return null
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*/
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nsIWidget* GetNearestWidget(nsPoint* aOffset) const;
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/**
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* Create a widget to associate with this view. This variant of
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* CreateWidget*() will look around in the view hierarchy for an
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* appropriate parent widget for the view.
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*
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* @param aWidgetInitData data used to initialize this view's widget before
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* its create is called.
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* @return error status
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*/
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nsresult CreateWidget(nsWidgetInitData* aWidgetInitData = nullptr,
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bool aEnableDragDrop = true,
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bool aResetVisibility = true);
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/**
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* Create a widget for this view with an explicit parent widget.
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* |aParentWidget| must be nonnull. The other params are the same
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* as for |CreateWidget()|.
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*/
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nsresult CreateWidgetForParent(nsIWidget* aParentWidget,
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nsWidgetInitData* aWidgetInitData = nullptr,
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bool aEnableDragDrop = true,
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bool aResetVisibility = true);
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/**
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* Create a popup widget for this view. Pass |aParentWidget| to
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* explicitly set the popup's parent. If it's not passed, the view
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* hierarchy will be searched for an appropriate parent widget. The
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* other params are the same as for |CreateWidget()|, except that
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* |aWidgetInitData| must be nonnull.
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*/
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nsresult CreateWidgetForPopup(nsWidgetInitData* aWidgetInitData,
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nsIWidget* aParentWidget = nullptr,
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bool aEnableDragDrop = true,
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bool aResetVisibility = true);
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/**
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* Destroys the associated widget for this view. If this method is
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* not called explicitly, the widget when be destroyed when its
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* view gets destroyed.
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*/
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void DestroyWidget();
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/**
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* Attach/detach a top level widget from this view. When attached, the view
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* updates the widget's device context and allows the view to begin receiving
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* gecko events. The underlying base window associated with the widget will
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* continues to receive events it expects.
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*
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* An attached widget will not be destroyed when the view is destroyed,
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* allowing the recycling of a single top level widget over multiple views.
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*
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* @param aWidget The widget to attach to / detach from.
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*/
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nsresult AttachToTopLevelWidget(nsIWidget* aWidget);
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nsresult DetachFromTopLevelWidget();
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/**
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* Returns a flag indicating whether the view owns it's widget
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* or is attached to an existing top level widget.
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*/
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bool IsAttachedToTopLevel() const { return mWidgetIsTopLevel; }
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/**
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* In 4.0, the "cutout" nature of a view is queryable.
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* If we believe that all cutout view have a native widget, this
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* could be a replacement.
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* @param aWidget out parameter for widget that this view contains,
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* or nullptr if there is none.
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*/
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nsIWidget* GetWidget() const { return mWindow; }
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/**
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* The widget which we have attached a listener to can also have a "previous"
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* listener set on it. This is to keep track of the last nsView when
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* navigating to a new one so that we can continue to paint that if the new
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* one isn't ready yet.
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*/
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void SetPreviousWidget(nsIWidget* aWidget) { mPreviousWindow = aWidget; }
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/**
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* Returns true if the view has a widget associated with it.
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*/
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bool HasWidget() const { return mWindow != nullptr; }
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void SetForcedRepaint(bool aForceRepaint) { mForcedRepaint = aForceRepaint; }
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void SetNeedsWindowPropertiesSync();
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/**
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* Make aWidget direct its events to this view.
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* The caller must call DetachWidgetEventHandler before this view
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* is destroyed.
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*/
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void AttachWidgetEventHandler(nsIWidget* aWidget);
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/**
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* Stop aWidget directing its events to this view.
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*/
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void DetachWidgetEventHandler(nsIWidget* aWidget);
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#ifdef DEBUG
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/**
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* Output debug info to FILE
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* @param out output file handle
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* @param aIndent indentation depth
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* NOTE: virtual so that debugging tools not linked into gklayout can access
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* it
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*/
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virtual void List(FILE* out, int32_t aIndent = 0) const;
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#endif // DEBUG
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/**
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* @result true iff this is the root view for its view manager
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*/
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bool IsRoot() const;
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LayoutDeviceIntRect CalcWidgetBounds(nsWindowType aType);
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// This is an app unit offset to add when converting view coordinates to
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// widget coordinates. It is the offset in view coordinates from widget
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// origin (unlike views, widgets can't extend above or to the left of their
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// origin) to view origin expressed in appunits of this.
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nsPoint ViewToWidgetOffset() const { return mViewToWidgetOffset; }
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/**
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* Called to indicate that the position of the view has been changed.
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* The specified coordinates are in the parent view's coordinate space.
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* @param x new x position
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* @param y new y position
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*/
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void SetPosition(nscoord aX, nscoord aY);
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/**
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* Called to indicate that the z-index of a view has been changed.
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* The z-index is relative to all siblings of the view.
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* @param aAuto Indicate that the z-index of a view is "auto". An "auto"
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* z-index means that the view does not define a new stacking
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* context, which means that the z-indicies of the view's
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* children are relative to the view's siblings.
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* @param zindex new z depth
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*/
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void SetZIndex(bool aAuto, int32_t aZIndex);
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bool GetZIndexIsAuto() const {
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return (mVFlags & NS_VIEW_FLAG_AUTO_ZINDEX) != 0;
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}
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int32_t GetZIndex() const { return mZIndex; }
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void SetParent(nsView* aParent) { mParent = aParent; }
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void SetNextSibling(nsView* aSibling) {
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NS_ASSERTION(aSibling != this, "Can't be our own sibling!");
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mNextSibling = aSibling;
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}
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nsRegion* GetDirtyRegion() {
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if (!mDirtyRegion) {
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NS_ASSERTION(!mParent || GetFloating(),
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"Only display roots should have dirty regions");
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mDirtyRegion = new nsRegion();
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NS_ASSERTION(mDirtyRegion, "Out of memory!");
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}
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return mDirtyRegion;
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}
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// nsIWidgetListener
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virtual mozilla::PresShell* GetPresShell() override;
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virtual nsView* GetView() override { return this; }
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virtual bool WindowMoved(nsIWidget* aWidget, int32_t x, int32_t y) override;
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virtual bool WindowResized(nsIWidget* aWidget, int32_t aWidth,
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int32_t aHeight) override;
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#if defined(MOZ_WIDGET_ANDROID)
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virtual void DynamicToolbarMaxHeightChanged(
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mozilla::ScreenIntCoord aHeight) override;
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virtual void DynamicToolbarOffsetChanged(
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mozilla::ScreenIntCoord aOffset) override;
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#endif
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virtual bool RequestWindowClose(nsIWidget* aWidget) override;
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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virtual void WillPaintWindow(nsIWidget* aWidget) override;
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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virtual bool PaintWindow(nsIWidget* aWidget,
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LayoutDeviceIntRegion aRegion) override;
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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virtual void DidPaintWindow() override;
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virtual void DidCompositeWindow(
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mozilla::layers::TransactionId aTransactionId,
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const mozilla::TimeStamp& aCompositeStart,
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const mozilla::TimeStamp& aCompositeEnd) override;
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virtual void RequestRepaint() override;
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virtual bool ShouldNotBeVisible() override;
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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virtual nsEventStatus HandleEvent(mozilla::WidgetGUIEvent* aEvent,
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bool aUseAttachedEvents) override;
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virtual void SafeAreaInsetsChanged(const mozilla::ScreenIntMargin&) override;
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virtual ~nsView();
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nsPoint GetOffsetTo(const nsView* aOther, const int32_t aAPD) const;
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nsIWidget* GetNearestWidget(nsPoint* aOffset, const int32_t aAPD) const;
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bool IsPrimaryFramePaintSuppressed();
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private:
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explicit nsView(nsViewManager* aViewManager = nullptr,
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nsViewVisibility aVisibility = nsViewVisibility_kShow);
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bool ForcedRepaint() { return mForcedRepaint; }
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// Do the actual work of ResetWidgetBounds, unconditionally. Don't
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// call this method if we have no widget.
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void DoResetWidgetBounds(bool aMoveOnly, bool aInvalidateChangedSize);
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void InitializeWindow(bool aEnableDragDrop, bool aResetVisibility);
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bool IsEffectivelyVisible();
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/**
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* Called to indicate that the dimensions of the view have been changed.
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* The x and y coordinates may be < 0, indicating that the view extends above
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* or to the left of its origin position. The term 'dimensions' indicates it
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* is relative to this view.
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*/
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void SetDimensions(const nsRect& aRect, bool aPaint = true,
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bool aResizeWidget = true);
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/**
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* Called to indicate that the visibility of a view has been
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* changed.
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* @param visibility new visibility state
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*/
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void SetVisibility(nsViewVisibility visibility);
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/**
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* Set/Get whether the view "floats" above all other views,
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* which tells the compositor not to consider higher views in
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* the view hierarchy that would geometrically intersect with
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* this view. This is a hack, but it fixes some problems with
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* views that need to be drawn in front of all other views.
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* @result true if the view floats, false otherwise.
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*/
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void SetFloating(bool aFloatingView);
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// Helper function to get mouse grabbing off this view (by moving it to the
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// parent, if we can)
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void DropMouseGrabbing();
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// Same as GetBounds but converts to parent appunits if they are different.
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nsRect GetBoundsInParentUnits() const;
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bool HasNonEmptyDirtyRegion() {
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return mDirtyRegion && !mDirtyRegion->IsEmpty();
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}
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void InsertChild(nsView* aChild, nsView* aSibling);
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void RemoveChild(nsView* aChild);
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void ResetWidgetBounds(bool aRecurse, bool aForceSync);
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void AssertNoWindow();
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void NotifyEffectiveVisibilityChanged(bool aEffectivelyVisible);
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// Update the cached RootViewManager for all view manager descendents.
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void InvalidateHierarchy();
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nsViewManager* mViewManager;
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nsView* mParent;
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nsCOMPtr<nsIWidget> mWindow;
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nsCOMPtr<nsIWidget> mPreviousWindow;
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nsView* mNextSibling;
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nsView* mFirstChild;
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nsIFrame* mFrame;
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nsRegion* mDirtyRegion;
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int32_t mZIndex;
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nsViewVisibility mVis;
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// position relative our parent view origin but in our appunits
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nscoord mPosX, mPosY;
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// relative to parent, but in our appunits
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nsRect mDimBounds;
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// in our appunits
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nsPoint mViewToWidgetOffset;
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uint32_t mVFlags;
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bool mWidgetIsTopLevel;
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bool mForcedRepaint;
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bool mNeedsWindowPropertiesSync;
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};
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#endif
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