diff options
Diffstat (limited to 'chromium/third_party/WebKit/Source/web/gtk/WebInputEventFactory.cpp')
| -rw-r--r-- | chromium/third_party/WebKit/Source/web/gtk/WebInputEventFactory.cpp | 628 |
1 files changed, 628 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/web/gtk/WebInputEventFactory.cpp b/chromium/third_party/WebKit/Source/web/gtk/WebInputEventFactory.cpp new file mode 100644 index 00000000000..ea66d6309d0 --- /dev/null +++ b/chromium/third_party/WebKit/Source/web/gtk/WebInputEventFactory.cpp @@ -0,0 +1,628 @@ +/* + * Copyright (C) 2006-2009 Google Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "WebInputEventFactory.h" + +#include "core/platform/chromium/KeyCodeConversion.h" +#include "core/platform/chromium/KeyboardCodes.h" + +#include "WebInputEvent.h" + +#include <gdk/gdk.h> +#include <gdk/gdkkeysyms.h> +#include <gtk/gtk.h> + +#include "wtf/Assertions.h" + +namespace { + +// For click count tracking. +static int gNumClicks = 0; +static GdkWindow* gLastClickEventWindow = 0; +static gint gLastClickTime = 0; +static gint gLastClickX = 0; +static gint gLastClickY = 0; +static WebKit::WebMouseEvent::Button gLastClickButton = WebKit::WebMouseEvent::ButtonNone; + +bool shouldForgetPreviousClick(GdkWindow* window, gint time, gint x, gint y) +{ + static GtkSettings* settings = gtk_settings_get_default(); + + if (window != gLastClickEventWindow) + return true; + + gint doubleClickTime = 250; + gint doubleClickDistance = 5; + g_object_get(G_OBJECT(settings), + "gtk-double-click-time", &doubleClickTime, + "gtk-double-click-distance", &doubleClickDistance, NULL); + return (time - gLastClickTime) > doubleClickTime + || abs(x - gLastClickX) > doubleClickDistance + || abs(y - gLastClickY) > doubleClickDistance; +} + +void resetClickCountState() +{ + gNumClicks = 0; + gLastClickEventWindow = 0; + gLastClickTime = 0; + gLastClickX = 0; + gLastClickY = 0; + gLastClickButton = WebKit::WebMouseEvent::ButtonNone; +} + +bool isKeyPadKeyval(guint keyval) +{ + // Keypad keyvals all fall into one range. + return keyval >= GDK_KP_Space && keyval <= GDK_KP_9; +} + +} // namespace + +namespace WebKit { + +static double gdkEventTimeToWebEventTime(guint32 time) +{ + // Convert from time in ms to time in sec. + return time / 1000.0; +} + +static int gdkStateToWebEventModifiers(guint state) +{ + int modifiers = 0; + if (state & GDK_SHIFT_MASK) + modifiers |= WebInputEvent::ShiftKey; + if (state & GDK_CONTROL_MASK) + modifiers |= WebInputEvent::ControlKey; + if (state & GDK_MOD1_MASK) + modifiers |= WebInputEvent::AltKey; + if (state & GDK_META_MASK) + modifiers |= WebInputEvent::MetaKey; + if (state & GDK_BUTTON1_MASK) + modifiers |= WebInputEvent::LeftButtonDown; + if (state & GDK_BUTTON2_MASK) + modifiers |= WebInputEvent::MiddleButtonDown; + if (state & GDK_BUTTON3_MASK) + modifiers |= WebInputEvent::RightButtonDown; + if (state & GDK_LOCK_MASK) + modifiers |= WebInputEvent::CapsLockOn; + if (state & GDK_MOD2_MASK) + modifiers |= WebInputEvent::NumLockOn; + return modifiers; +} + +static int gdkEventToWindowsKeyCode(const GdkEventKey* event) +{ + static const unsigned int hardwareCodeToGDKKeyval[] = { + 0, // 0x00: + 0, // 0x01: + 0, // 0x02: + 0, // 0x03: + 0, // 0x04: + 0, // 0x05: + 0, // 0x06: + 0, // 0x07: + 0, // 0x08: + 0, // 0x09: GDK_Escape + GDK_1, // 0x0A: GDK_1 + GDK_2, // 0x0B: GDK_2 + GDK_3, // 0x0C: GDK_3 + GDK_4, // 0x0D: GDK_4 + GDK_5, // 0x0E: GDK_5 + GDK_6, // 0x0F: GDK_6 + GDK_7, // 0x10: GDK_7 + GDK_8, // 0x11: GDK_8 + GDK_9, // 0x12: GDK_9 + GDK_0, // 0x13: GDK_0 + GDK_minus, // 0x14: GDK_minus + GDK_equal, // 0x15: GDK_equal + 0, // 0x16: GDK_BackSpace + 0, // 0x17: GDK_Tab + GDK_q, // 0x18: GDK_q + GDK_w, // 0x19: GDK_w + GDK_e, // 0x1A: GDK_e + GDK_r, // 0x1B: GDK_r + GDK_t, // 0x1C: GDK_t + GDK_y, // 0x1D: GDK_y + GDK_u, // 0x1E: GDK_u + GDK_i, // 0x1F: GDK_i + GDK_o, // 0x20: GDK_o + GDK_p, // 0x21: GDK_p + GDK_bracketleft, // 0x22: GDK_bracketleft + GDK_bracketright, // 0x23: GDK_bracketright + 0, // 0x24: GDK_Return + 0, // 0x25: GDK_Control_L + GDK_a, // 0x26: GDK_a + GDK_s, // 0x27: GDK_s + GDK_d, // 0x28: GDK_d + GDK_f, // 0x29: GDK_f + GDK_g, // 0x2A: GDK_g + GDK_h, // 0x2B: GDK_h + GDK_j, // 0x2C: GDK_j + GDK_k, // 0x2D: GDK_k + GDK_l, // 0x2E: GDK_l + GDK_semicolon, // 0x2F: GDK_semicolon + GDK_apostrophe, // 0x30: GDK_apostrophe + GDK_grave, // 0x31: GDK_grave + 0, // 0x32: GDK_Shift_L + GDK_backslash, // 0x33: GDK_backslash + GDK_z, // 0x34: GDK_z + GDK_x, // 0x35: GDK_x + GDK_c, // 0x36: GDK_c + GDK_v, // 0x37: GDK_v + GDK_b, // 0x38: GDK_b + GDK_n, // 0x39: GDK_n + GDK_m, // 0x3A: GDK_m + GDK_comma, // 0x3B: GDK_comma + GDK_period, // 0x3C: GDK_period + GDK_slash, // 0x3D: GDK_slash + 0, // 0x3E: GDK_Shift_R + 0, // 0x3F: + 0, // 0x40: + 0, // 0x41: + 0, // 0x42: + 0, // 0x43: + 0, // 0x44: + 0, // 0x45: + 0, // 0x46: + 0, // 0x47: + 0, // 0x48: + 0, // 0x49: + 0, // 0x4A: + 0, // 0x4B: + 0, // 0x4C: + 0, // 0x4D: + 0, // 0x4E: + 0, // 0x4F: + 0, // 0x50: + 0, // 0x51: + 0, // 0x52: + 0, // 0x53: + 0, // 0x54: + 0, // 0x55: + 0, // 0x56: + 0, // 0x57: + 0, // 0x58: + 0, // 0x59: + 0, // 0x5A: + 0, // 0x5B: + 0, // 0x5C: + 0, // 0x5D: + 0, // 0x5E: + 0, // 0x5F: + 0, // 0x60: + 0, // 0x61: + 0, // 0x62: + 0, // 0x63: + 0, // 0x64: + 0, // 0x65: + 0, // 0x66: + 0, // 0x67: + 0, // 0x68: + 0, // 0x69: + 0, // 0x6A: + 0, // 0x6B: + 0, // 0x6C: + 0, // 0x6D: + 0, // 0x6E: + 0, // 0x6F: + 0, // 0x70: + 0, // 0x71: + 0, // 0x72: + GDK_Super_L, // 0x73: GDK_Super_L + GDK_Super_R, // 0x74: GDK_Super_R + }; + + // |windowsKeyCode| has to include a valid virtual-key code even when we + // use non-US layouts, e.g. even when we type an 'A' key of a US keyboard + // on the Hebrew layout, |windowsKeyCode| should be VK_A. + // On the other hand, |event->keyval| value depends on the current + // GdkKeymap object, i.e. when we type an 'A' key of a US keyboard on + // the Hebrew layout, |event->keyval| becomes GDK_hebrew_shin and this + // WebCore::windowsKeyCodeForKeyEvent() call returns 0. + // To improve compatibilty with Windows, we use |event->hardware_keycode| + // for retrieving its Windows key-code for the keys when the + // WebCore::windowsKeyCodeForEvent() call returns 0. + // We shouldn't use |event->hardware_keycode| for keys that GdkKeymap + // objects cannot change because |event->hardware_keycode| doesn't change + // even when we change the layout options, e.g. when we swap a control + // key and a caps-lock key, GTK doesn't swap their + // |event->hardware_keycode| values but swap their |event->keyval| values. + int windowsKeyCode = WebCore::windowsKeyCodeForKeyEvent(event->keyval); + if (windowsKeyCode) + return windowsKeyCode; + + const int tableSize = sizeof(hardwareCodeToGDKKeyval) / sizeof(hardwareCodeToGDKKeyval[0]); + if (event->hardware_keycode < tableSize) { + int keyval = hardwareCodeToGDKKeyval[event->hardware_keycode]; + if (keyval) + return WebCore::windowsKeyCodeForKeyEvent(keyval); + } + + // This key is one that keyboard-layout drivers cannot change. + // Use |event->keyval| to retrieve its |windowsKeyCode| value. + return WebCore::windowsKeyCodeForKeyEvent(event->keyval); +} + +// Normalizes event->state to make it Windows/Mac compatible. Since the way +// of setting modifier mask on X is very different than Windows/Mac as shown +// in http://crbug.com/127142#c8, the normalization is necessary. +static guint normalizeEventState(const GdkEventKey* event) +{ + guint mask = 0; + switch (gdkEventToWindowsKeyCode(event)) { + case WebCore::VKEY_CONTROL: + case WebCore::VKEY_LCONTROL: + case WebCore::VKEY_RCONTROL: + mask = GDK_CONTROL_MASK; + break; + case WebCore::VKEY_SHIFT: + case WebCore::VKEY_LSHIFT: + case WebCore::VKEY_RSHIFT: + mask = GDK_SHIFT_MASK; + break; + case WebCore::VKEY_MENU: + case WebCore::VKEY_LMENU: + case WebCore::VKEY_RMENU: + mask = GDK_MOD1_MASK; + break; + case WebCore::VKEY_CAPITAL: + mask = GDK_LOCK_MASK; + break; + default: + return event->state; + } + if (event->type == GDK_KEY_PRESS) + return event->state | mask; + return event->state & ~mask; +} + +// Gets the corresponding control character of a specified key code. See: +// http://en.wikipedia.org/wiki/Control_characters +// We emulate Windows behavior here. +static WebUChar getControlCharacter(int windowsKeyCode, bool shift) +{ + if (windowsKeyCode >= WebCore::VKEY_A && windowsKeyCode <= WebCore::VKEY_Z) { + // ctrl-A ~ ctrl-Z map to \x01 ~ \x1A + return windowsKeyCode - WebCore::VKEY_A + 1; + } + if (shift) { + // following graphics chars require shift key to input. + switch (windowsKeyCode) { + // ctrl-@ maps to \x00 (Null byte) + case WebCore::VKEY_2: + return 0; + // ctrl-^ maps to \x1E (Record separator, Information separator two) + case WebCore::VKEY_6: + return 0x1E; + // ctrl-_ maps to \x1F (Unit separator, Information separator one) + case WebCore::VKEY_OEM_MINUS: + return 0x1F; + // Returns 0 for all other keys to avoid inputting unexpected chars. + default: + return 0; + } + } else { + switch (windowsKeyCode) { + // ctrl-[ maps to \x1B (Escape) + case WebCore::VKEY_OEM_4: + return 0x1B; + // ctrl-\ maps to \x1C (File separator, Information separator four) + case WebCore::VKEY_OEM_5: + return 0x1C; + // ctrl-] maps to \x1D (Group separator, Information separator three) + case WebCore::VKEY_OEM_6: + return 0x1D; + // ctrl-Enter maps to \x0A (Line feed) + case WebCore::VKEY_RETURN: + return 0x0A; + // Returns 0 for all other keys to avoid inputting unexpected chars. + default: + return 0; + } + } +} + +// WebKeyboardEvent ----------------------------------------------------------- + +WebKeyboardEvent WebInputEventFactory::keyboardEvent(const GdkEventKey* event) +{ + WebKeyboardEvent result; + + result.timeStampSeconds = gdkEventTimeToWebEventTime(event->time); + result.modifiers = gdkStateToWebEventModifiers(normalizeEventState(event)); + + switch (event->type) { + case GDK_KEY_RELEASE: + result.type = WebInputEvent::KeyUp; + break; + case GDK_KEY_PRESS: + result.type = WebInputEvent::RawKeyDown; + break; + default: + ASSERT_NOT_REACHED(); + } + + // According to MSDN: + // http://msdn.microsoft.com/en-us/library/ms646286(VS.85).aspx + // Key events with Alt modifier and F10 are system key events. + // We just emulate this behavior. It's necessary to prevent webkit from + // processing keypress event generated by alt-d, etc. + // F10 is not special on Linux, so don't treat it as system key. + if (result.modifiers & WebInputEvent::AltKey) + result.isSystemKey = true; + + // The key code tells us which physical key was pressed (for example, the + // A key went down or up). It does not determine whether A should be lower + // or upper case. This is what text does, which should be the keyval. + int windowsKeyCode = gdkEventToWindowsKeyCode(event); + result.windowsKeyCode = WebKeyboardEvent::windowsKeyCodeWithoutLocation(windowsKeyCode); + result.modifiers |= WebKeyboardEvent::locationModifiersFromWindowsKeyCode(windowsKeyCode); + result.nativeKeyCode = event->hardware_keycode; + + if (result.windowsKeyCode == WebCore::VKEY_RETURN) + // We need to treat the enter key as a key press of character \r. This + // is apparently just how webkit handles it and what it expects. + result.unmodifiedText[0] = '\r'; + else + // FIXME: fix for non BMP chars + result.unmodifiedText[0] = + static_cast<WebUChar>(gdk_keyval_to_unicode(event->keyval)); + + // If ctrl key is pressed down, then control character shall be input. + if (result.modifiers & WebInputEvent::ControlKey) + result.text[0] = getControlCharacter( + result.windowsKeyCode, result.modifiers & WebInputEvent::ShiftKey); + else + result.text[0] = result.unmodifiedText[0]; + + result.setKeyIdentifierFromWindowsKeyCode(); + + // FIXME: Do we need to set IsAutoRepeat? + if (isKeyPadKeyval(event->keyval)) + result.modifiers |= WebInputEvent::IsKeyPad; + + return result; +} + +WebKeyboardEvent WebInputEventFactory::keyboardEvent(wchar_t character, int state, double timeStampSeconds) +{ + // keyboardEvent(const GdkEventKey*) depends on the GdkEventKey object and + // it is hard to use/ it from signal handlers which don't use GdkEventKey + // objects (e.g. GtkIMContext signal handlers.) For such handlers, this + // function creates a WebInputEvent::Char event without using a + // GdkEventKey object. + WebKeyboardEvent result; + result.type = WebKit::WebInputEvent::Char; + result.timeStampSeconds = timeStampSeconds; + result.modifiers = gdkStateToWebEventModifiers(state); + result.windowsKeyCode = character; + result.nativeKeyCode = character; + result.text[0] = character; + result.unmodifiedText[0] = character; + + // According to MSDN: + // http://msdn.microsoft.com/en-us/library/ms646286(VS.85).aspx + // Key events with Alt modifier and F10 are system key events. + // We just emulate this behavior. It's necessary to prevent webkit from + // processing keypress event generated by alt-d, etc. + // F10 is not special on Linux, so don't treat it as system key. + if (result.modifiers & WebInputEvent::AltKey) + result.isSystemKey = true; + + return result; +} + +// WebMouseEvent -------------------------------------------------------------- + +WebMouseEvent WebInputEventFactory::mouseEvent(const GdkEventButton* event) +{ + WebMouseEvent result; + + result.timeStampSeconds = gdkEventTimeToWebEventTime(event->time); + + result.modifiers = gdkStateToWebEventModifiers(event->state); + result.x = static_cast<int>(event->x); + result.y = static_cast<int>(event->y); + result.windowX = result.x; + result.windowY = result.y; + result.globalX = static_cast<int>(event->x_root); + result.globalY = static_cast<int>(event->y_root); + result.clickCount = 0; + + switch (event->type) { + case GDK_BUTTON_PRESS: + result.type = WebInputEvent::MouseDown; + break; + case GDK_BUTTON_RELEASE: + result.type = WebInputEvent::MouseUp; + break; + case GDK_3BUTTON_PRESS: + case GDK_2BUTTON_PRESS: + default: + ASSERT_NOT_REACHED(); + }; + + result.button = WebMouseEvent::ButtonNone; + if (event->button == 1) + result.button = WebMouseEvent::ButtonLeft; + else if (event->button == 2) + result.button = WebMouseEvent::ButtonMiddle; + else if (event->button == 3) + result.button = WebMouseEvent::ButtonRight; + + if (result.type == WebInputEvent::MouseDown) { + bool forgetPreviousClick = shouldForgetPreviousClick(event->window, event->time, event->x, event->y); + + if (!forgetPreviousClick && result.button == gLastClickButton) + ++gNumClicks; + else { + gNumClicks = 1; + + gLastClickEventWindow = event->window; + gLastClickX = event->x; + gLastClickY = event->y; + gLastClickButton = result.button; + } + gLastClickTime = event->time; + } + result.clickCount = gNumClicks; + + return result; +} + +WebMouseEvent WebInputEventFactory::mouseEvent(const GdkEventMotion* event) +{ + WebMouseEvent result; + + result.timeStampSeconds = gdkEventTimeToWebEventTime(event->time); + result.modifiers = gdkStateToWebEventModifiers(event->state); + result.x = static_cast<int>(event->x); + result.y = static_cast<int>(event->y); + result.windowX = result.x; + result.windowY = result.y; + result.globalX = static_cast<int>(event->x_root); + result.globalY = static_cast<int>(event->y_root); + + switch (event->type) { + case GDK_MOTION_NOTIFY: + result.type = WebInputEvent::MouseMove; + break; + default: + ASSERT_NOT_REACHED(); + } + + result.button = WebMouseEvent::ButtonNone; + if (event->state & GDK_BUTTON1_MASK) + result.button = WebMouseEvent::ButtonLeft; + else if (event->state & GDK_BUTTON2_MASK) + result.button = WebMouseEvent::ButtonMiddle; + else if (event->state & GDK_BUTTON3_MASK) + result.button = WebMouseEvent::ButtonRight; + + if (shouldForgetPreviousClick(event->window, event->time, event->x, event->y)) + resetClickCountState(); + + return result; +} + +WebMouseEvent WebInputEventFactory::mouseEvent(const GdkEventCrossing* event) +{ + WebMouseEvent result; + + result.timeStampSeconds = gdkEventTimeToWebEventTime(event->time); + result.modifiers = gdkStateToWebEventModifiers(event->state); + result.x = static_cast<int>(event->x); + result.y = static_cast<int>(event->y); + result.windowX = result.x; + result.windowY = result.y; + result.globalX = static_cast<int>(event->x_root); + result.globalY = static_cast<int>(event->y_root); + + switch (event->type) { + case GDK_ENTER_NOTIFY: + case GDK_LEAVE_NOTIFY: + // Note that if we sent MouseEnter or MouseLeave to WebKit, it + // wouldn't work - they don't result in the proper JavaScript events. + // MouseMove does the right thing. + result.type = WebInputEvent::MouseMove; + break; + default: + ASSERT_NOT_REACHED(); + } + + result.button = WebMouseEvent::ButtonNone; + if (event->state & GDK_BUTTON1_MASK) + result.button = WebMouseEvent::ButtonLeft; + else if (event->state & GDK_BUTTON2_MASK) + result.button = WebMouseEvent::ButtonMiddle; + else if (event->state & GDK_BUTTON3_MASK) + result.button = WebMouseEvent::ButtonRight; + + if (shouldForgetPreviousClick(event->window, event->time, event->x, event->y)) + resetClickCountState(); + + return result; +} + +// WebMouseWheelEvent --------------------------------------------------------- + +WebMouseWheelEvent WebInputEventFactory::mouseWheelEvent(const GdkEventScroll* event) +{ + WebMouseWheelEvent result; + + result.type = WebInputEvent::MouseWheel; + result.button = WebMouseEvent::ButtonNone; + + result.timeStampSeconds = gdkEventTimeToWebEventTime(event->time); + result.modifiers = gdkStateToWebEventModifiers(event->state); + result.x = static_cast<int>(event->x); + result.y = static_cast<int>(event->y); + result.windowX = result.x; + result.windowY = result.y; + result.globalX = static_cast<int>(event->x_root); + result.globalY = static_cast<int>(event->y_root); + + // How much should we scroll per mouse wheel event? + // - Windows uses 3 lines by default and obeys a system setting. + // - Mozilla has a pref that lets you either use the "system" number of lines + // to scroll, or lets the user override it. + // For the "system" number of lines, it appears they've hardcoded 3. + // See case NS_MOUSE_SCROLL in content/events/src/nsEventStateManager.cpp + // and InitMouseScrollEvent in widget/src/gtk2/nsCommonWidget.cpp . + // - Gtk makes the scroll amount a function of the size of the scroll bar, + // which is not available to us here. + // Instead, we pick a number that empirically matches Firefox's behavior. + static const float scrollbarPixelsPerTick = 160.0f / 3.0f; + + switch (event->direction) { + case GDK_SCROLL_UP: + result.deltaY = scrollbarPixelsPerTick; + result.wheelTicksY = 1; + break; + case GDK_SCROLL_DOWN: + result.deltaY = -scrollbarPixelsPerTick; + result.wheelTicksY = -1; + break; + case GDK_SCROLL_LEFT: + result.deltaX = scrollbarPixelsPerTick; + result.wheelTicksX = 1; + break; + case GDK_SCROLL_RIGHT: + result.deltaX = -scrollbarPixelsPerTick; + result.wheelTicksX = -1; + break; + } + + return result; +} + +} // namespace WebKit |