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      1 /*
      2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #import "config.h"
     27 #import "PlatformScreen.h"
     28 
     29 #import "FloatRect.h"
     30 #import "Frame.h"
     31 #import "FrameView.h"
     32 #import "Page.h"
     33 
     34 namespace WebCore {
     35 
     36 int screenDepth(Widget*)
     37 {
     38     return NSBitsPerPixelFromDepth([[NSScreen deepestScreen] depth]);
     39 }
     40 
     41 int screenDepthPerComponent(Widget*)
     42 {
     43     return NSBitsPerSampleFromDepth([[NSScreen deepestScreen] depth]);
     44 }
     45 
     46 bool screenIsMonochrome(Widget*)
     47 {
     48     return false;
     49 }
     50 
     51 // These functions scale between screen and page coordinates because JavaScript/DOM operations
     52 // assume that the screen and the page share the same coordinate system.
     53 
     54 FloatRect screenRect(Widget* widget)
     55 {
     56     NSWindow *window = widget ? [widget->platformWidget() window] : nil;
     57     return toUserSpace([screenForWindow(window) frame], window);
     58 }
     59 
     60 FloatRect screenAvailableRect(Widget* widget)
     61 {
     62     NSWindow *window = widget ? [widget->platformWidget() window] : nil;
     63     return toUserSpace([screenForWindow(window) visibleFrame], window);
     64 }
     65 
     66 NSScreen *screenForWindow(NSWindow *window)
     67 {
     68     NSScreen *screen = [window screen]; // nil if the window is off-screen
     69     if (screen)
     70         return screen;
     71 
     72     NSArray *screens = [NSScreen screens];
     73     if ([screens count] > 0)
     74         return [screens objectAtIndex:0]; // screen containing the menubar
     75 
     76     return nil;
     77 }
     78 
     79 FloatRect toUserSpace(const NSRect& rect, NSWindow *destination)
     80 {
     81     FloatRect userRect = rect;
     82     userRect.setY(NSMaxY([screenForWindow(destination) frame]) - (userRect.y() + userRect.height())); // flip
     83     if (destination)
     84         userRect.scale(1 / [destination userSpaceScaleFactor]); // scale down
     85     return userRect;
     86 }
     87 
     88 NSRect toDeviceSpace(const FloatRect& rect, NSWindow *source)
     89 {
     90     FloatRect deviceRect = rect;
     91     if (source)
     92         deviceRect.scale([source userSpaceScaleFactor]); // scale up
     93     deviceRect.setY(NSMaxY([screenForWindow(source) frame]) - (deviceRect.y() + deviceRect.height())); // flip
     94     return deviceRect;
     95 }
     96 
     97 NSPoint flipScreenPoint(const NSPoint& screenPoint, NSScreen *screen)
     98 {
     99     NSPoint flippedPoint = screenPoint;
    100     flippedPoint.y = NSMaxY([screen frame]) - flippedPoint.y;
    101     return flippedPoint;
    102 }
    103 
    104 } // namespace WebCore
    105