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render focus rings for native push buttons correctly. b=409912 r=cbarrett sr=roc

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This commit is contained in:
joshmoz@gmail.com 2008-01-08 18:52:36 -08:00
parent 5d17fe1046
commit 1b05b01087
1 changed files with 74 additions and 63 deletions
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137
widget/src/cocoa/nsNativeThemeCocoa.mm
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@ -78,6 +78,46 @@ extern "C" {
static const int kThemeScrollBarArrowsBoth = 2;
#define HITHEME_ORIENTATION kHIThemeOrientationNormal
#define MAX_FOCUS_RING_WIDTH 4
// These enums are for indexing into the margin array.
enum {
tigerOS,
leopardOS
};
enum {
miniControlSize,
smallControlSize,
regularControlSize
};
enum {
leftMargin,
topMargin,
rightMargin,
bottomMargin
};
static int EnumSizeForCocoaSize(NSControlSize cocoaControlSize) {
if (cocoaControlSize == NSMiniControlSize)
return miniControlSize;
else if (cocoaControlSize == NSSmallControlSize)
return smallControlSize;
else
return regularControlSize;
}
static void InflateControlRect(NSRect* rect, NSControlSize cocoaControlSize, const float marginSet[][3][4])
{
static int osIndex = nsToolkit::OnLeopardOrLater() ? leopardOS : tigerOS;
int 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];
}
NS_IMPL_ISUPPORTS1(nsNativeThemeCocoa, nsITheme)
@ -163,34 +203,6 @@ nsNativeThemeCocoa::DrawCheckboxRadio(CGContextRef cgContext, ThemeButtonKind in
#define NATURAL_REGULAR_ROUNDED_BUTTON_MIN_WIDTH 30
#define NATURAL_REGULAR_ROUNDED_BUTTON_HEIGHT 22
// These enums are for indexing into the margin array.
enum {
tigerOS,
leopardOS
};
enum {
miniControlSize,
smallControlSize,
regularControlSize
};
enum {
leftMargin,
topMargin,
rightMargin,
bottomMargin
};
static int EnumSizeForCocoaSize(NSControlSize cocoaControlSize) {
if (cocoaControlSize == NSMiniControlSize)
return miniControlSize;
else if (cocoaControlSize == NSSmallControlSize)
return smallControlSize;
else
return regularControlSize;
}
// These were calculated by testing all three sizes on the respective operating system.
static const float pushButtonMargins[2][3][4] =
{
@ -206,18 +218,6 @@ static const float pushButtonMargins[2][3][4] =
}
};
static void InflatePushButtonRect(NSRect* rect, NSControlSize cocoaControlSize)
{
static int osIndex = nsToolkit::OnLeopardOrLater() ? leopardOS : tigerOS;
int controlSize = EnumSizeForCocoaSize(cocoaControlSize);
const float* buttonMargins = pushButtonMargins[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];
}
void
nsNativeThemeCocoa::DrawPushButton(CGContextRef cgContext, const HIRect& inBoxRect, PRBool inIsDefault,
PRBool inDisabled, PRInt32 inState)
@ -227,15 +227,12 @@ nsNativeThemeCocoa::DrawPushButton(CGContextRef cgContext, const HIRect& inBoxRe
[mPushButtonCell setEnabled:!inDisabled];
[mPushButtonCell setHighlighted:((inState & NS_EVENT_STATE_ACTIVE) && (inState & NS_EVENT_STATE_HOVER) || (inIsDefault && !inDisabled))];
[mPushButtonCell setShowsFirstResponder:(inState & NS_EVENT_STATE_FOCUS)];
// Set up the graphics context we've been asked to draw to.
NSGraphicsContext* savedContext = [NSGraphicsContext currentContext];
[NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithGraphicsPort:cgContext flipped:YES]];
[NSGraphicsContext saveGraphicsState];
// We clip to exactly the gecko rect to make sure we don't draw outside of it.
[NSBezierPath clipRect:drawRect];
// This flips the image in place and is necessary to work around a bug in the way
// NSButtonCell draws buttons.
CGContextScaleCTM(cgContext, 1.0f, -1.0f);
@ -273,27 +270,43 @@ nsNativeThemeCocoa::DrawPushButton(CGContextRef cgContext, const HIRect& inBoxRe
if (drawRect.size.height == naturalHeight) {
// Just inflate the rect Gecko gave us by the margin for the control.
NSRect cellRenderRect = drawRect;
InflatePushButtonRect(&cellRenderRect, controlSize);
InflateControlRect(&cellRenderRect, controlSize, pushButtonMargins);
[mPushButtonCell drawWithFrame:cellRenderRect inView:[NSView focusView]];
}
else {
// The initial buffer size is the natural height of the control and either the target
// width or the minimum width of the control.
NSSize initialBufferSize = NSMakeSize(drawRect.size.width, naturalHeight);
initialBufferSize.width = PR_MAX(minWidth, initialBufferSize.width);
// Scale the initial buffer width up to compensate for the down-scaling we'll do.
// We need to calculate three things here - the size of our offscreen buffer, the rect we'll
// use to draw into it, and the rect that we'll copy the buffer to.
// This is the rect we'll render the control into our buffer with. We need to inset our control to leave room for a
// focus ring to be rendered. Also, we start with the min width for the control or the desired width, whichever is
// larger.
NSRect bufferRenderRect = NSMakeRect(MAX_FOCUS_RING_WIDTH, MAX_FOCUS_RING_WIDTH, PR_MAX(minWidth, drawRect.size.width), naturalHeight);
// Adjust the size of our control to avoid distortion when scaling.
float scaleFactor = drawRect.size.height / naturalHeight;
if (scaleFactor != 0.0)
initialBufferSize.width = initialBufferSize.width / scaleFactor;
bufferRenderRect.size.width = bufferRenderRect.size.width / scaleFactor;
// This is the rect we should have the cell render to in the buffer. We will then resize
// the image to the size of drawRect.
NSRect bufferRenderRect = NSMakeRect(0, 0, initialBufferSize.width, initialBufferSize.height);
InflatePushButtonRect(&bufferRenderRect, controlSize);
// At this point the size of our render rect reflects the size of the control we actually
// want to draw into the buffer. Grab it for our initial buffer size and then expand the
// buffer size to allow for a focus ring to render.
NSSize initialBufferSize = bufferRenderRect.size;
initialBufferSize.width += (MAX_FOCUS_RING_WIDTH * 2);
initialBufferSize.height += (MAX_FOCUS_RING_WIDTH * 2);
// Create a buffer and lock focus on it.
// Now we need to inflate our rendering rect to account for the quirks of NSCell rendering,
// which is what this rect will actually be used for. The rect we pass to NSCell for
// rendering is not necessarily the same size as the control that gets drawn.
InflateControlRect(&bufferRenderRect, controlSize, pushButtonMargins);
// This is the rect in our destination that we'll copy our buffer to.
NSRect finalCopyRect = NSMakeRect(drawRect.origin.x - MAX_FOCUS_RING_WIDTH,
drawRect.origin.y - MAX_FOCUS_RING_WIDTH,
drawRect.size.width + (MAX_FOCUS_RING_WIDTH * 2),
drawRect.size.height + (MAX_FOCUS_RING_WIDTH * 2));
// Now actually do all the drawing/scaling with the rects we have set up.
NSImage *buffer = [[NSImage alloc] initWithSize:initialBufferSize];
if (!LockFocusOnImage(buffer)) {
[buffer release];
@ -302,17 +315,15 @@ nsNativeThemeCocoa::DrawPushButton(CGContextRef cgContext, const HIRect& inBoxRe
return;
}
// Draw into the focused buffer.
[mPushButtonCell drawWithFrame:bufferRenderRect inView:[NSView focusView]];
// Resize the image to the final size.
[buffer setScalesWhenResized:YES];
[[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh];
[buffer setSize:drawRect.size];
[buffer setSize:finalCopyRect.size];
[buffer unlockFocus];
[buffer drawInRect:drawRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];
[buffer drawInRect:finalCopyRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];
[buffer release];
}
@ -1198,7 +1209,7 @@ nsNativeThemeCocoa::GetWidgetOverflow(nsIDeviceContext* aContext, nsIFrame* aFra
{
// We assume that the above widgets can draw a focus ring that will be less than
// or equal to 4 pixels thick.
nsIntMargin extraSize = nsIntMargin(4, 4, 4, 4);
nsIntMargin extraSize = nsIntMargin(MAX_FOCUS_RING_WIDTH, MAX_FOCUS_RING_WIDTH, MAX_FOCUS_RING_WIDTH, MAX_FOCUS_RING_WIDTH);
PRInt32 p2a = aContext->AppUnitsPerDevPixel();
nsMargin m(NSIntPixelsToAppUnits(extraSize.left, p2a),
NSIntPixelsToAppUnits(extraSize.top, p2a),