| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #import "ui/events/cocoa/cocoa_event_utils.h" |
| |
| #include "ui/events/event_constants.h" |
| #include "ui/events/event_utils.h" |
| |
| namespace { |
| |
| bool IsLeftButtonEvent(NSEvent* event) { |
| NSEventType type = [event type]; |
| return type == NSLeftMouseDown || type == NSLeftMouseDragged || |
| type == NSLeftMouseUp; |
| } |
| |
| bool IsRightButtonEvent(NSEvent* event) { |
| NSEventType type = [event type]; |
| return type == NSRightMouseDown || type == NSRightMouseDragged || |
| type == NSRightMouseUp; |
| } |
| |
| bool IsMiddleButtonEvent(NSEvent* event) { |
| if ([event buttonNumber] != 2) |
| return false; |
| |
| NSEventType type = [event type]; |
| return type == NSOtherMouseDown || type == NSOtherMouseDragged || |
| type == NSOtherMouseUp; |
| } |
| |
| // Return true if the target modifier key is up. OS X has an "official" flag |
| // to test whether either left or right versions of a modifier key are held, |
| // and "unofficial" flags for the left and right versions independently. This |
| // function verifies that |target_key_mask| and |otherKeyMask| (which should be |
| // the left and right versions of a modifier) are consistent with with the |
| // state of |eitherKeyMask| (which should be the corresponding ""official" |
| // flag). If they are consistent, it tests |target_key_mask|; otherwise it tests |
| // |either_key_mask|. |
| inline bool IsModifierKeyUp(unsigned int flags, |
| unsigned int target_key_mask, |
| unsigned int other_key_mask, |
| unsigned int either_key_mask) { |
| bool either_key_down = (flags & either_key_mask) != 0; |
| bool target_key_down = (flags & target_key_mask) != 0; |
| bool other_key_down = (flags & other_key_mask) != 0; |
| if (either_key_down != (target_key_down || other_key_down)) |
| return !either_key_down; |
| return !target_key_down; |
| } |
| |
| } // namespace |
| |
| namespace ui { |
| |
| int EventFlagsFromModifiers(NSUInteger modifiers) { |
| int flags = 0; |
| flags |= (modifiers & NSAlphaShiftKeyMask) ? ui::EF_CAPS_LOCK_ON : 0; |
| flags |= (modifiers & NSShiftKeyMask) ? ui::EF_SHIFT_DOWN : 0; |
| flags |= (modifiers & NSControlKeyMask) ? ui::EF_CONTROL_DOWN : 0; |
| flags |= (modifiers & NSAlternateKeyMask) ? ui::EF_ALT_DOWN : 0; |
| flags |= (modifiers & NSCommandKeyMask) ? ui::EF_COMMAND_DOWN : 0; |
| return flags; |
| } |
| |
| int EventFlagsFromNSEventWithModifiers(NSEvent* event, NSUInteger modifiers) { |
| int flags = EventFlagsFromModifiers(modifiers); |
| if (IsLeftButtonEvent(event)) { |
| // For Mac, convert Ctrl+LeftClick to a RightClick, and remove the Control |
| // key modifier. |
| if (modifiers & NSControlKeyMask) |
| flags = (flags & ~ui::EF_CONTROL_DOWN) | ui::EF_RIGHT_MOUSE_BUTTON; |
| else |
| flags |= ui::EF_LEFT_MOUSE_BUTTON; |
| } |
| |
| flags |= IsRightButtonEvent(event) ? ui::EF_RIGHT_MOUSE_BUTTON : 0; |
| flags |= IsMiddleButtonEvent(event) ? ui::EF_MIDDLE_MOUSE_BUTTON : 0; |
| return flags; |
| } |
| |
| bool IsKeyUpEvent(NSEvent* event) { |
| if ([event type] != NSFlagsChanged) |
| return [event type] == NSKeyUp; |
| |
| // Unofficial bit-masks for left- and right-hand versions of modifier keys. |
| // These values were determined empirically. |
| const unsigned int kLeftControlKeyMask = 1 << 0; |
| const unsigned int kLeftShiftKeyMask = 1 << 1; |
| const unsigned int kRightShiftKeyMask = 1 << 2; |
| const unsigned int kLeftCommandKeyMask = 1 << 3; |
| const unsigned int kRightCommandKeyMask = 1 << 4; |
| const unsigned int kLeftAlternateKeyMask = 1 << 5; |
| const unsigned int kRightAlternateKeyMask = 1 << 6; |
| const unsigned int kRightControlKeyMask = 1 << 13; |
| |
| switch ([event keyCode]) { |
| case 54: // Right Command |
| return IsModifierKeyUp([event modifierFlags], kRightCommandKeyMask, |
| kLeftCommandKeyMask, NSCommandKeyMask); |
| case 55: // Left Command |
| return IsModifierKeyUp([event modifierFlags], kLeftCommandKeyMask, |
| kRightCommandKeyMask, NSCommandKeyMask); |
| |
| case 57: // Capslock |
| return ([event modifierFlags] & NSAlphaShiftKeyMask) == 0; |
| |
| case 56: // Left Shift |
| return IsModifierKeyUp([event modifierFlags], kLeftShiftKeyMask, |
| kRightShiftKeyMask, NSShiftKeyMask); |
| case 60: // Right Shift |
| return IsModifierKeyUp([event modifierFlags], kRightShiftKeyMask, |
| kLeftShiftKeyMask, NSShiftKeyMask); |
| |
| case 58: // Left Alt |
| return IsModifierKeyUp([event modifierFlags], kLeftAlternateKeyMask, |
| kRightAlternateKeyMask, NSAlternateKeyMask); |
| case 61: // Right Alt |
| return IsModifierKeyUp([event modifierFlags], kRightAlternateKeyMask, |
| kLeftAlternateKeyMask, NSAlternateKeyMask); |
| |
| case 59: // Left Ctrl |
| return IsModifierKeyUp([event modifierFlags], kLeftControlKeyMask, |
| kRightControlKeyMask, NSControlKeyMask); |
| case 62: // Right Ctrl |
| return IsModifierKeyUp([event modifierFlags], kRightControlKeyMask, |
| kLeftControlKeyMask, NSControlKeyMask); |
| |
| case 63: // Function |
| return ([event modifierFlags] & NSFunctionKeyMask) == 0; |
| } |
| return false; |
| } |
| |
| } // namespace ui |