/* 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/. */
/** * DimensionRequest allows to request the change of some dimensions without * having to specify the unchanged dimensions. This is specifically necessary * when a change is initiated from a child process, which might not have an * up-to-date view of its latest dimensions. Having to specify the missing * dimensions with an outdated view can revert a previous change. * * The following series of changes `window.screenX = 10; window.screenY = 10;` * essentially translates into two moveTo() calls. For the second call we want * to account for changes made by the first call. From a child process we would * end up crafting the second call without knowing the results of the first * call. In the parent process we have access to results of the first call * before crafting the second one. Although on Linux even the parent process * doesn't have immediate access to the results of the last change. * * Note: The concept of an inner position is not present on * nsIDocShellTreeOwner and nsIBaseWindow. A request specifying an inner * position will return an NS_ERROR_NOT_IMPLEMENTED.
*/ struct DimensionRequest {
DimensionKind mDimensionKind;
Maybe<LayoutDeviceIntCoord> mX;
Maybe<LayoutDeviceIntCoord> mY;
Maybe<LayoutDeviceIntCoord> mWidth;
Maybe<LayoutDeviceIntCoord> mHeight;
/** * Fills the missing dimensions with values obtained from `aSource`. Whether * inner dimensions are supported depends on the implementation of * `nsIBaseWindow::GetDimensions` for `aSource`. * * @param aSource The source for the missing dimensions.
*/
nsresult SupplementFrom(nsIBaseWindow* aSource);
/** * Changes the outer size and or position of `aTarget`. Only outer dimensions * are supported. * * @param aTarget The target whose size or position we want to change.
*/
nsresult ApplyOuterTo(nsIBaseWindow* aTarget);
/** * Changes the inner size of `aTarget`. Only inner dimensions are supported. * * @param aTarget The target whose size we want to change.
*/
nsresult ApplyInnerTo(nsIDocShellTreeOwner* aTarget, bool aAsRootShell);
};
} // namespace mozilla
#endif// mozilla_DimensionRequest_h
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