コード例 #1
0
double
WheelEvent::DeltaZ()
{
  if (!mAppUnitsPerDevPixel) {
    return mEvent->AsWheelEvent()->mDeltaZ;
  }
  return mEvent->AsWheelEvent()->mDeltaZ *
    mAppUnitsPerDevPixel / AppUnitsPerCSSPixel();
}
コード例 #2
0
TEST_F(APZCSnappingTester, Bug1265510)
{
  const char* layerTreeSyntax = "c(t)";
  nsIntRegion layerVisibleRegion[] = {
    nsIntRegion(IntRect(0, 0, 100, 100)),
    nsIntRegion(IntRect(0, 100, 100, 100))
  };
  root = CreateLayerTree(layerTreeSyntax, layerVisibleRegion, nullptr, lm, layers);
  SetScrollableFrameMetrics(root, FrameMetrics::START_SCROLL_ID, CSSRect(0, 0, 100, 200));
  SetScrollableFrameMetrics(layers[1], FrameMetrics::START_SCROLL_ID + 1, CSSRect(0, 0, 100, 200));
  SetScrollHandoff(layers[1], root);

  ScrollSnapInfo snap;
  snap.mScrollSnapTypeY = NS_STYLE_SCROLL_SNAP_TYPE_MANDATORY;
  snap.mScrollSnapIntervalY = Some(100 * AppUnitsPerCSSPixel());

  ScrollMetadata metadata = root->GetScrollMetadata(0);
  metadata.SetSnapInfo(ScrollSnapInfo(snap));
  root->SetScrollMetadata(metadata);

  UniquePtr<ScopedLayerTreeRegistration> registration = MakeUnique<ScopedLayerTreeRegistration>(manager, 0, root, mcc);
  manager->UpdateHitTestingTree(nullptr, root, false, 0, 0);

  TestAsyncPanZoomController* outer = ApzcOf(layers[0]);
  TestAsyncPanZoomController* inner = ApzcOf(layers[1]);

  // Position the mouse near the bottom of the outer frame and scroll by 60px.
  // (6 lines of 10px each). APZC will actually scroll to y=100 because of the
  // mandatory snap coordinate there.
  TimeStamp now = mcc->Time();
  SmoothWheel(manager, ScreenIntPoint(50, 80), ScreenPoint(0, 6), now);
  // Advance in 5ms increments until we've scrolled by 70px. At this point, the
  // closest snap point is y=100, and the inner frame should be under the mouse
  // cursor.
  while (outer->GetCurrentAsyncScrollOffset(AsyncPanZoomController::AsyncMode::NORMAL).y < 70) {
    mcc->AdvanceByMillis(5);
    outer->AdvanceAnimations(mcc->Time());
  }
  // Now do another wheel in a new transaction. This should start scrolling the
  // inner frame; we verify that it does by checking the inner scroll position.
  TimeStamp newTransactionTime = now + TimeDuration::FromMilliseconds(gfxPrefs::MouseWheelTransactionTimeoutMs() + 100);
  SmoothWheel(manager, ScreenIntPoint(50, 80), ScreenPoint(0, 6), newTransactionTime);
  inner->AdvanceAnimationsUntilEnd();
  EXPECT_LT(0.0f, inner->GetCurrentAsyncScrollOffset(AsyncPanZoomController::AsyncMode::NORMAL).y);

  // However, the outer frame should also continue to the snap point, otherwise
  // it is demonstrating incorrect behaviour by violating the mandatory snapping.
  outer->AdvanceAnimationsUntilEnd();
  EXPECT_EQ(100.0f, outer->GetCurrentAsyncScrollOffset(AsyncPanZoomController::AsyncMode::NORMAL).y);
}
コード例 #3
0
nsresult
nsThebesDeviceContext::SetDPI()
{
    PRInt32 dpi = -1;
    PRBool dotsArePixels = PR_TRUE;
    // The number of device pixels per CSS pixel. A value <= 0 means choose
    // automatically based on the DPI. A positive value is used as-is. This effectively
    // controls the size of a CSS "px".
    float prefDevPixelsPerCSSPixel = -1.0;

    nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
    if (prefs) {
        nsXPIDLCString prefString;
        nsresult rv = prefs->GetCharPref("layout.css.devPixelsPerPx", getter_Copies(prefString));
        if (NS_SUCCEEDED(rv) && !prefString.IsEmpty()) {
            prefDevPixelsPerCSSPixel = static_cast<float>(atof(prefString));
        }
    }

    // PostScript, PDF and Mac (when printing) all use 72 dpi
    // Use a printing DC to determine the other dpi values
    if (mPrintingSurface) {
        switch (mPrintingSurface->GetType()) {
            case gfxASurface::SurfaceTypePDF:
            case gfxASurface::SurfaceTypePS:
            case gfxASurface::SurfaceTypeQuartz:
                dpi = 72;
                break;
#ifdef XP_WIN
            case gfxASurface::SurfaceTypeWin32:
            case gfxASurface::SurfaceTypeWin32Printing: {
                PRInt32 OSVal = GetDeviceCaps(GetPrintHDC(), LOGPIXELSY);
                dpi = 144;
                mPrintingScale = float(OSVal) / dpi;
                break;
            }
#endif
#ifdef XP_OS2
            case gfxASurface::SurfaceTypeOS2:
                LONG lDPI;
                if (DevQueryCaps(GetPrintHDC(), CAPS_VERTICAL_FONT_RES, 1, &lDPI))
                    dpi = lDPI;
                break;
#endif
            default:
                NS_NOTREACHED("Unexpected printing surface type");
                break;
        }
        dotsArePixels = PR_FALSE;
    } else {
        nsresult rv;
        // A value of -1 means use the minimum of 96 and the system DPI.
        // A value of 0 means use the system DPI. A positive value is used as the DPI.
        // This sets the physical size of a device pixel and thus controls the
        // interpretation of physical units such as "pt".
        PRInt32 prefDPI = -1;
        if (prefs) {
            rv = prefs->GetIntPref("layout.css.dpi", &prefDPI);
            if (NS_FAILED(rv)) {
                prefDPI = -1;
            }
        }

        dpi = gfxPlatform::GetDPI();

#ifdef MOZ_ENABLE_GTK2
        if (prefDPI < 0) // Clamp the minimum dpi to 96dpi
            dpi = PR_MAX(dpi, 96);
#endif
 
        if (prefDPI > 0 && !mPrintingSurface)
            dpi = prefDPI;
    }

    NS_ASSERTION(dpi != -1, "no dpi set");

    if (dotsArePixels) {
        if (prefDevPixelsPerCSSPixel <= 0) {
            // Round down to multiple of 96, which is the number of dev pixels
            // per CSS pixel.  Then, divide that into AppUnitsPerCSSPixel()
            // to get the number of app units per dev pixel.  The PR_MAXes are
            // to make sure we don't end up dividing by zero.
            PRUint32 roundedDPIScaleFactor = dpi/96;
            mAppUnitsPerDevNotScaledPixel =
                PR_MAX(1, AppUnitsPerCSSPixel() / PR_MAX(1, roundedDPIScaleFactor));
        } else {
            mAppUnitsPerDevNotScaledPixel =
                PR_MAX(1, static_cast<PRInt32>(AppUnitsPerCSSPixel() /
                                               prefDevPixelsPerCSSPixel));
        }
    } else {
        /* set mAppUnitsPerDevPixel so we're using exactly 72 dpi, even
         * though that means we have a non-integer number of device "pixels"
         * per CSS pixel
         */
        mAppUnitsPerDevNotScaledPixel = (AppUnitsPerCSSPixel() * 96) / dpi;
    }

    mAppUnitsPerInch = NSIntPixelsToAppUnits(dpi, mAppUnitsPerDevNotScaledPixel);

    UpdateScaledAppUnits();

    return NS_OK;
}
コード例 #4
0
nsresult
nsThebesDeviceContext::SetDPI()
{
    float dpi = -1.0f;

    // PostScript, PDF and Mac (when printing) all use 72 dpi
    // Use a printing DC to determine the other dpi values
    if (mPrintingSurface) {
        switch (mPrintingSurface->GetType()) {
            case gfxASurface::SurfaceTypePDF:
            case gfxASurface::SurfaceTypePS:
            case gfxASurface::SurfaceTypeQuartz:
                dpi = 72.0f;
                break;
#ifdef XP_WIN
            case gfxASurface::SurfaceTypeWin32:
            case gfxASurface::SurfaceTypeWin32Printing: {
                PRInt32 OSVal = GetDeviceCaps(GetPrintHDC(), LOGPIXELSY);
                dpi = 144.0f;
                mPrintingScale = float(OSVal) / dpi;
                break;
            }
#endif
#ifdef XP_OS2
            case gfxASurface::SurfaceTypeOS2:
                LONG lDPI;
                if (DevQueryCaps(GetPrintHDC(), CAPS_VERTICAL_FONT_RES, 1, &lDPI))
                    dpi = lDPI;
                break;
#endif
            default:
                NS_NOTREACHED("Unexpected printing surface type");
                break;
        }

        mAppUnitsPerDevNotScaledPixel =
          NS_lround((AppUnitsPerCSSPixel() * 96) / dpi);
    } else {
        nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);

        // A value of -1 means use the maximum of 96 and the system DPI.
        // A value of 0 means use the system DPI. A positive value is used as the DPI.
        // This sets the physical size of a device pixel and thus controls the
        // interpretation of physical units.
        PRInt32 prefDPI = -1;
        if (prefs) {
            nsresult rv = prefs->GetIntPref("layout.css.dpi", &prefDPI);
            if (NS_FAILED(rv)) {
                prefDPI = -1;
            }
        }

        if (prefDPI > 0) {
            dpi = prefDPI;
        } else if (mWidget) {
            dpi = mWidget->GetDPI();

            if (prefDPI < 0) {
                dpi = PR_MAX(96.0f, dpi);
            }
        } else {
            dpi = 96.0f;
        }

        // The number of device pixels per CSS pixel. A value <= 0 means choose
        // automatically based on the DPI. A positive value is used as-is. This effectively
        // controls the size of a CSS "px".
        float devPixelsPerCSSPixel = -1.0;

        if (prefs) {
            nsXPIDLCString prefString;
            nsresult rv = prefs->GetCharPref("layout.css.devPixelsPerPx", getter_Copies(prefString));
            if (NS_SUCCEEDED(rv) && !prefString.IsEmpty()) {
                devPixelsPerCSSPixel = static_cast<float>(atof(prefString));
            }
        }

        if (devPixelsPerCSSPixel <= 0) {
            if (mWidget) {
                devPixelsPerCSSPixel = mWidget->GetDefaultScale();
            } else {
                devPixelsPerCSSPixel = 1.0;
            }
        }

        mAppUnitsPerDevNotScaledPixel =
            PR_MAX(1, NS_lround(AppUnitsPerCSSPixel() / devPixelsPerCSSPixel));
    }

    NS_ASSERTION(dpi != -1.0, "no dpi set");

    mAppUnitsPerPhysicalInch = NS_lround(dpi * mAppUnitsPerDevNotScaledPixel);
    UpdateScaledAppUnits();

    return NS_OK;
}