widget/nsBaseScreen.h
author Jan Henning <jh+bugzilla@buttercookie.de>
Fri, 11 Jan 2019 21:21:41 +0000
changeset 453568 0355f47af6ceab050018e9c27fc9d9c4bb944662
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
child 472056 e1993a1f09ac53cd1a04fdf6a87f8cad8e44f73e
permissions -rw-r--r--
Bug 1517976 - Test that resetting WindowUtils.isFirstPaint doesn't clobber APZ scroll position. r=botond We need to setup a case where the visual viewport is smaller than the layout viewport. Faking a pinch zoom through touch events is imprecise, whereas calling windowUtils.setResolutionAndScaleTo(value > 1) to simulate the equivalent effect of a pinch-zoom on the page led to the subsequent scroll attempt failing quite often even after calling waitForApzFlushedRepaints(). So instead, we set up a very wide layout viewport through the meta viewport tag, which on Desktop means additionally enabling the dom.meta-viewport.enabled pref. Differential Revision: https://phabricator.services.mozilla.com/D15791

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* 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 nsBaseScreen_h
#define nsBaseScreen_h

#include "mozilla/Attributes.h"
#include "nsIScreen.h"

class nsBaseScreen : public nsIScreen {
 public:
  nsBaseScreen();

  NS_DECL_ISUPPORTS

  // nsIScreen interface

  // These simply forward to the device-pixel versions;
  // implementations where desktop pixels may not correspond
  // to per-screen device pixels must override.
  NS_IMETHOD GetRectDisplayPix(int32_t *outLeft, int32_t *outTop,
                               int32_t *outWidth, int32_t *outHeight) override;
  NS_IMETHOD GetAvailRectDisplayPix(int32_t *outLeft, int32_t *outTop,
                                    int32_t *outWidth,
                                    int32_t *outHeight) override;

  NS_IMETHOD GetContentsScaleFactor(double *aContentsScaleFactor) override;

  NS_IMETHOD GetDefaultCSSScaleFactor(double *aScaleFactor) override;

  NS_IMETHOD GetDpi(float *aDPI) override;

 protected:
  virtual ~nsBaseScreen();
};

#endif  // nsBaseScreen_h