Global Metrics

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Minimal test - lines (306, 317)

Code

static void InflateControlRect(NSRect* rect, NSControlSize cocoaControlSize,
                               const float marginSet[][3][4]) {
  if (!marginSet) return;

  static int osIndex = yosemiteOSorlater;
  size_t controlSize = EnumSizeForCocoaSize(cocoaControlSize);
  const float* buttonMargins = marginSet[osIndex][controlSize];
  rect->origin.x -= buttonMargins[leftMargin];
  rect->origin.y -= buttonMargins[bottomMargin];
  rect->size.width += buttonMargins[leftMargin] + buttonMargins[rightMargin];
  rect->size.height += buttonMargins[bottomMargin] + buttonMargins[topMargin];
}

Minimal test - lines (138, 144)

Code

@interface NSProgressBarCell : NSCell {
  /*All instance variables are private*/
  double mValue;
  double mMax;
  bool mIsIndeterminate;
  bool mIsHorizontal;
}

Minimal test - lines (474, 480)

Code

static int GetBackingScaleFactorForRendering(CGContextRef cgContext) {
  CGAffineTransform ctm = CGContextGetUserSpaceToDeviceSpaceTransform(cgContext);
  CGRect transformedUserSpacePixel = CGRectApplyAffineTransform(CGRectMake(0, 0, 1, 1), ctm);
  float maxScale = std::max(fabs(transformedUserSpacePixel.size.width),
                            fabs(transformedUserSpacePixel.size.height));
  return maxScale > 1.0 ? 2 : 1;
}

Minimal test - lines (507, 618)

Code

static void DrawCellWithScaling(NSCell* cell, CGContextRef cgContext, const HIRect& destRect,
                                NSControlSize controlSize, NSSize naturalSize, NSSize minimumSize,
                                const float marginSet[][3][4], NSView* view,
                                BOOL mirrorHorizontal) {
  NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;

  NSRect drawRect =
      NSMakeRect(destRect.origin.x, destRect.origin.y, destRect.size.width, destRect.size.height);

  if (naturalSize.width != 0.0f) drawRect.size.width = naturalSize.width;
  if (naturalSize.height != 0.0f) drawRect.size.height = naturalSize.height;

  // Keep aspect ratio when scaling if one dimension is free.
  if (naturalSize.width == 0.0f && naturalSize.height != 0.0f)
    drawRect.size.width = destRect.size.width * naturalSize.height / destRect.size.height;
  if (naturalSize.height == 0.0f && naturalSize.width != 0.0f)
    drawRect.size.height = destRect.size.height * naturalSize.width / destRect.size.width;

  // Honor minimum sizes.
  if (drawRect.size.width < minimumSize.width) drawRect.size.width = minimumSize.width;
  if (drawRect.size.height < minimumSize.height) drawRect.size.height = minimumSize.height;

  [NSGraphicsContext saveGraphicsState];

  // Only skip the buffer if the area of our cell (in pixels^2) is too large.
  if (drawRect.size.width * drawRect.size.height > BITMAP_MAX_AREA) {
    // Inflate the rect Gecko gave us by the margin for the control.
    InflateControlRect(&drawRect, controlSize, marginSet);

    NSGraphicsContext* savedContext = [NSGraphicsContext currentContext];
    [NSGraphicsContext
        setCurrentContext:[NSGraphicsContext graphicsContextWithGraphicsPort:cgContext
                                                                     flipped:YES]];

    DrawCellIncludingFocusRing(cell, drawRect, view);

    [NSGraphicsContext setCurrentContext:savedContext];
  } else {
    float w = ceil(drawRect.size.width);
    float h = ceil(drawRect.size.height);
    NSRect tmpRect = NSMakeRect(kMaxFocusRingWidth, kMaxFocusRingWidth, w, h);

    // inflate to figure out the frame we need to tell NSCell to draw in, to get something that's
    // 0,0,w,h
    InflateControlRect(&tmpRect, controlSize, marginSet);

    // and then, expand by kMaxFocusRingWidth size to make sure we can capture any focus ring
    w += kMaxFocusRingWidth * 2.0;
    h += kMaxFocusRingWidth * 2.0;

    int backingScaleFactor = GetBackingScaleFactorForRendering(cgContext);
    CGColorSpaceRef rgb = CGColorSpaceCreateDeviceRGB();
    CGContextRef ctx = CGBitmapContextCreate(
        NULL, (int)w * backingScaleFactor, (int)h * backingScaleFactor, 8,
        (int)w * backingScaleFactor * 4, rgb, kCGImageAlphaPremultipliedFirst);
    CGColorSpaceRelease(rgb);

    // We need to flip the image twice in order to avoid drawing bugs on 10.4, see bug 465069.
    // This is the first flip transform, applied to cgContext.
    CGContextScaleCTM(cgContext, 1.0f, -1.0f);
    CGContextTranslateCTM(cgContext, 0.0f, -(2.0 * destRect.origin.y + destRect.size.height));
    if (mirrorHorizontal) {
      CGContextScaleCTM(cgContext, -1.0f, 1.0f);
      CGContextTranslateCTM(cgContext, -(2.0 * destRect.origin.x + destRect.size.width), 0.0f);
    }

    NSGraphicsContext* savedContext = [NSGraphicsContext currentContext];
    [NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithGraphicsPort:ctx
                                                                                    flipped:YES]];

    CGContextScaleCTM(ctx, backingScaleFactor, backingScaleFactor);

    // Set the context's "base transform" to in order to get correctly-sized focus rings.
    CGContextSetBaseCTM(ctx, CGAffineTransformMakeScale(backingScaleFactor, backingScaleFactor));

    // This is the second flip transform, applied to ctx.
    CGContextScaleCTM(ctx, 1.0f, -1.0f);
    CGContextTranslateCTM(ctx, 0.0f, -(2.0 * tmpRect.origin.y + tmpRect.size.height));

    DrawCellIncludingFocusRing(cell, tmpRect, view);

    [NSGraphicsContext setCurrentContext:savedContext];

    CGImageRef img = CGBitmapContextCreateImage(ctx);

    // Drop the image into the original destination rectangle, scaling to fit
    // Only scale kMaxFocusRingWidth by xscale/yscale when the resulting rect
    // doesn't extend beyond the overflow rect
    float xscale = destRect.size.width / drawRect.size.width;
    float yscale = destRect.size.height / drawRect.size.height;
    float scaledFocusRingX = xscale < 1.0f ? kMaxFocusRingWidth * xscale : kMaxFocusRingWidth;
    float scaledFocusRingY = yscale < 1.0f ? kMaxFocusRingWidth * yscale : kMaxFocusRingWidth;
    CGContextDrawImage(
        cgContext,
        CGRectMake(destRect.origin.x - scaledFocusRingX, destRect.origin.y - scaledFocusRingY,
                   destRect.size.width + scaledFocusRingX * 2,
                   destRect.size.height + scaledFocusRingY * 2),
        img);

    CGImageRelease(img);
    CGContextRelease(ctx);
  }

  [NSGraphicsContext restoreGraphicsState];

#if DRAW_IN_FRAME_DEBUG
  CGContextSetRGBFillColor(cgContext, 0.0, 0.0, 0.5, 0.25);
  CGContextFillRect(cgContext, destRect);
#endif

  NS_OBJC_END_TRY_IGNORE_BLOCK;
}

Minimal test - lines (288, 295)

Code

static NSControlSize CocoaSizeForEnum(int32_t enumControlSize) {
  if (enumControlSize == miniControlSize)
    return NSControlSizeMini;
  else if (enumControlSize == smallControlSize)
    return NSControlSizeSmall;
  else
    return NSControlSizeRegular;
}

Minimal test - lines (373, 381)

Code

static bool IsInSourceList(nsIFrame* aFrame) {
  for (nsIFrame* frame = aFrame->GetParent(); frame;
       frame = nsLayoutUtils::GetCrossDocParentFrame(frame)) {
    if (frame->StyleDisplay()->EffectiveAppearance() == StyleAppearance::MozMacSourceList) {
      return true;
    }
  }
  return false;
}

Minimal test - lines (645, 676)

Code

static NSControlSize FindControlSize(CGFloat size, const CGFloat* sizes, CGFloat tolerance) {
  for (uint32_t i = miniControlSize; i <= regularControlSize; ++i) {
    if (sizes[i] == 0) {
      continue;
    }

    CGFloat next = 0;
    // Find next value.
    for (uint32_t j = i + 1; j <= regularControlSize; ++j) {
      if (sizes[j] != 0) {
        next = sizes[j];
        break;
      }
    }

    // If it's the latest value, we pick it.
    if (next == 0) {
      return CocoaSizeForEnum(i);
    }

    if (size <= sizes[i] + tolerance && size < next) {
      return CocoaSizeForEnum(i);
    }
  }

  // If we are here, that means sizes[] was an array with only empty values
  // or the algorithm above is wrong.
  // The former can happen but the later would be wrong.
  NS_ASSERTION(sizes[0] == 0 && sizes[1] == 0 && sizes[2] == 0,
               "We found no control! We shouldn't be there!");
  return CocoaSizeForEnum(regularControlSize);
}

Minimal test - lines (754, 789)

Code

@end

static id GetAquaAppearance() {
  Class NSAppearanceClass = NSClassFromString(@"NSAppearance");
  if (NSAppearanceClass && [NSAppearanceClass respondsToSelector:@selector(appearanceNamed:)]) {
    return [NSAppearanceClass performSelector:@selector(appearanceNamed:)
                                   withObject:@"NSAppearanceNameAqua"];
  }
  return nil;
}

@interface NSObject (NSAppearanceCoreUIRendering)
- (void)_drawInRect:(CGRect)rect context:(CGContextRef)cgContext options:(id)options;
@end

static void RenderWithCoreUI(CGRect aRect, CGContextRef cgContext, NSDictionary* aOptions,
                             bool aSkipAreaCheck = false) {
  id appearance = GetAquaAppearance();

  if (!aSkipAreaCheck && aRect.size.width * aRect.size.height > BITMAP_MAX_AREA) {
    return;
  }

  if (appearance && [appearance respondsToSelector:@selector(_drawInRect:context:options:)]) {
    // Render through NSAppearance on Mac OS 10.10 and up. This will call
    // CUIDraw with a CoreUI renderer that will give us the correct 10.10
    // style. Calling CUIDraw directly with [NSWindow coreUIRenderer] still
    // renders 10.9-style widgets on 10.10.
    [appearance _drawInRect:aRect context:cgContext options:aOptions];
  } else {
    // 10.9 and below
    CUIRendererRef renderer =
        [NSWindow respondsToSelector:@selector(coreUIRenderer)] ? [NSWindow coreUIRenderer] : nil;
    CUIDraw(renderer, aRect, cgContext, (CFDictionaryRef)aOptions, NULL);
  }
}

Minimal test - lines (688, 750)

Code

static void DrawCellWithSnapping(NSCell* cell, CGContextRef cgContext, const HIRect& destRect,
                                 const CellRenderSettings settings, float verticalAlignFactor,
                                 NSView* view, BOOL mirrorHorizontal, float snapTolerance = 2.0f) {
  NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;

  const float rectWidth = destRect.size.width, rectHeight = destRect.size.height;
  const NSSize* sizes = settings.naturalSizes;
  const NSSize miniSize = sizes[EnumSizeForCocoaSize(NSControlSizeMini)];
  const NSSize smallSize = sizes[EnumSizeForCocoaSize(NSControlSizeSmall)];
  const NSSize regularSize = sizes[EnumSizeForCocoaSize(NSControlSizeRegular)];

  HIRect drawRect = destRect;

  CGFloat controlWidths[3] = {miniSize.width, smallSize.width, regularSize.width};
  NSControlSize controlSizeX = FindControlSize(rectWidth, controlWidths, snapTolerance);
  CGFloat controlHeights[3] = {miniSize.height, smallSize.height, regularSize.height};
  NSControlSize controlSizeY = FindControlSize(rectHeight, controlHeights, snapTolerance);

  NSControlSize controlSize = NSControlSizeRegular;
  size_t sizeIndex = 0;

  // At some sizes, don't scale but snap.
  const NSControlSize smallerControlSize =
      EnumSizeForCocoaSize(controlSizeX) < EnumSizeForCocoaSize(controlSizeY) ? controlSizeX
                                                                              : controlSizeY;
  const size_t smallerControlSizeIndex = EnumSizeForCocoaSize(smallerControlSize);
  const NSSize size = sizes[smallerControlSizeIndex];
  float diffWidth = size.width ? rectWidth - size.width : 0.0f;
  float diffHeight = size.height ? rectHeight - size.height : 0.0f;
  if (diffWidth >= 0.0f && diffHeight >= 0.0f && diffWidth <= snapTolerance &&
      diffHeight <= snapTolerance) {
    // Snap to the smaller control size.
    controlSize = smallerControlSize;
    sizeIndex = smallerControlSizeIndex;
    MOZ_ASSERT(sizeIndex < ArrayLength(settings.naturalSizes));

    // Resize and center the drawRect.
    if (sizes[sizeIndex].width) {
      drawRect.origin.x += ceil((destRect.size.width - sizes[sizeIndex].width) / 2);
      drawRect.size.width = sizes[sizeIndex].width;
    }
    if (sizes[sizeIndex].height) {
      drawRect.origin.y +=
          floor((destRect.size.height - sizes[sizeIndex].height) * verticalAlignFactor);
      drawRect.size.height = sizes[sizeIndex].height;
    }
  } else {
    // Use the larger control size.
    controlSize = EnumSizeForCocoaSize(controlSizeX) > EnumSizeForCocoaSize(controlSizeY)
                      ? controlSizeX
                      : controlSizeY;
    sizeIndex = EnumSizeForCocoaSize(controlSize);
  }

  [cell setControlSize:controlSize];

  MOZ_ASSERT(sizeIndex < ArrayLength(settings.minimumSizes));
  const NSSize minimumSize = settings.minimumSizes[sizeIndex];
  DrawCellWithScaling(cell, cgContext, drawRect, controlSize, sizes[sizeIndex], minimumSize,
                      settings.margins, view, mirrorHorizontal);

  NS_OBJC_END_TRY_IGNORE_BLOCK;
}

Minimal test - lines (791, 816)

Code

static float VerticalAlignFactor(nsIFrame* aFrame) {
  if (!aFrame) return 0.5f;  // default: center

  const auto& va = aFrame->StyleDisplay()->mVerticalAlign;
  auto kw = va.IsKeyword() ? va.AsKeyword() : StyleVerticalAlignKeyword::Middle;
  switch (kw) {
    case StyleVerticalAlignKeyword::Top:
    case StyleVerticalAlignKeyword::TextTop:
      return 0.0f;

    case StyleVerticalAlignKeyword::Sub:
    case StyleVerticalAlignKeyword::Super:
    case StyleVerticalAlignKeyword::Middle:
    case StyleVerticalAlignKeyword::MozMiddleWithBaseline:
      return 0.5f;

    case StyleVerticalAlignKeyword::Baseline:
    case StyleVerticalAlignKeyword::Bottom:
    case StyleVerticalAlignKeyword::TextBottom:
      return 1.0f;

    default:
      MOZ_ASSERT_UNREACHABLE("invalid vertical-align");
      return 0.5f;
  }
}

Minimal test - lines (319, 329)

Code

static NSWindow* NativeWindowForFrame(nsIFrame* aFrame, nsIWidget** aTopLevelWidget = NULL) {
  if (!aFrame) return nil;

  nsIWidget* widget = aFrame->GetNearestWidget();
  if (!widget) return nil;

  nsIWidget* topLevelWidget = widget->GetTopLevelWidget();
  if (aTopLevelWidget) *aTopLevelWidget = topLevelWidget;

  return (NSWindow*)topLevelWidget->GetNativeData(NS_NATIVE_WINDOW);
}

Minimal test - lines (331, 352)

Code

static NSSize WindowButtonsSize(nsIFrame* aFrame) {
  NSWindow* window = NativeWindowForFrame(aFrame);
  if (!window) {
    // Return fallback values.
    return NSMakeSize(54, 16);
  }

  NSRect buttonBox = NSZeroRect;
  NSButton* closeButton = [window standardWindowButton:NSWindowCloseButton];
  if (closeButton) {
    buttonBox = NSUnionRect(buttonBox, [closeButton frame]);
  }
  NSButton* minimizeButton = [window standardWindowButton:NSWindowMiniaturizeButton];
  if (minimizeButton) {
    buttonBox = NSUnionRect(buttonBox, [minimizeButton frame]);
  }
  NSButton* zoomButton = [window standardWindowButton:NSWindowZoomButton];
  if (zoomButton) {
    buttonBox = NSUnionRect(buttonBox, [zoomButton frame]);
  }
  return buttonBox.size;
}

Minimal test - lines (297, 304)

Code

static NSString* CUIControlSizeForCocoaSize(NSControlSize aControlSize) {
  if (aControlSize == NSControlSizeRegular)
    return @"regular";
  else if (aControlSize == NSControlSizeSmall)
    return @"small";
  else
    return @"mini";
}

Minimal test - lines (279, 286)

Code

static size_t EnumSizeForCocoaSize(NSControlSize cocoaControlSize) {
  if (cocoaControlSize == NSControlSizeMini)
    return miniControlSize;
  else if (cocoaControlSize == NSControlSizeSmall)
    return smallControlSize;
  else
    return regularControlSize;
}

Minimal test - lines (620, 634)

Code

struct CellRenderSettings {
  // The natural dimensions of the control.
  // If a control has no natural dimensions in either/both axes, set to 0.0f.
  NSSize naturalSizes[3];

  // The minimum dimensions of the control.
  // If a control has no minimum dimensions in either/both axes, set to 0.0f.
  NSSize minimumSizes[3];

  // A three-dimensional array,
  // with the first dimension being the OS version ([0] 10.6-10.9, [1] 10.10 and above),
  // the second being the control size (mini, small, regular), and the third
  // being the 4 margin values (left, top, right, bottom).
  float margins[2][3][4];
};