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      1 /*
      2  * Copyright (C) 2009 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "WebScreenInfoFactory.h"
     33 
     34 #import <AppKit/AppKit.h>
     35 
     36 #include "WebScreenInfo.h"
     37 
     38 namespace WebKit {
     39 
     40 static NSScreen* screenForWindow(NSWindow* window)
     41 {
     42     NSScreen* screen = [window screen];  // nil if the window is off-screen
     43     if (screen)
     44         return screen;
     45 
     46     NSArray* screens = [NSScreen screens];
     47     if ([screens count] > 0)
     48         return [screens objectAtIndex:0];  // screen containing the menubar
     49 
     50     return nil;
     51 }
     52 
     53 static WebRect toUserSpace(const NSRect& rect, NSWindow* destination)
     54 {
     55     CGRect userRect = NSRectToCGRect(rect);
     56 
     57     userRect.origin.y =
     58         NSMaxY([screenForWindow(destination) frame]) - (userRect.origin.y + userRect.size.height); // flip
     59 
     60     if (destination) {
     61         CGFloat scale = 1 / [destination userSpaceScaleFactor];  // scale down
     62         userRect.origin.x *= scale;
     63         userRect.origin.y *= scale;
     64         userRect.size.width *= scale;
     65         userRect.size.height *= scale;
     66     }
     67 
     68     return WebRect(userRect.origin.x,
     69                    userRect.origin.y,
     70                    userRect.size.width,
     71                    userRect.size.height);
     72 }
     73 
     74 WebScreenInfo WebScreenInfoFactory::screenInfo(NSView* view)
     75 {
     76     NSString *colorSpace = NSColorSpaceFromDepth([[NSScreen deepestScreen] depth]);
     77 
     78     WebScreenInfo results;
     79     results.depth =
     80         NSBitsPerPixelFromDepth([[NSScreen deepestScreen] depth]);
     81     results.depthPerComponent =
     82         NSBitsPerSampleFromDepth([[NSScreen deepestScreen] depth]);
     83     results.isMonochrome = colorSpace == NSCalibratedWhiteColorSpace
     84                         || colorSpace == NSCalibratedBlackColorSpace
     85                         || colorSpace == NSDeviceWhiteColorSpace
     86                         || colorSpace == NSDeviceBlackColorSpace;
     87     results.rect =
     88         toUserSpace([screenForWindow([view window]) frame], [view window]);
     89     results.availableRect =
     90         toUserSpace([screenForWindow([view window]) visibleFrame], [view window]);
     91     return results;
     92 }
     93 
     94 } // namespace WebKit
     95