/*
 * Copyright (C) 2010 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "WebPage.h"

#include "NotImplemented.h"
#include "WebEvent.h"
#include <WebCore/FocusController.h>
#include <WebCore/Frame.h>
#include <WebCore/KeyboardEvent.h>
#include <WebCore/Page.h>
#include <WebCore/PlatformKeyboardEvent.h>
#include <WebCore/Settings.h>

#ifndef VK_UNKNOWN
#define VK_UNKNOWN 0
#define VK_BACK 0x08
#define VK_TAB 0x09
#define VK_CLEAR 0x0C
#define VK_RETURN 0x0D
#define VK_SHIFT 0x10
#define VK_CONTROL 0x11 // CTRL key
#define VK_MENU 0x12 // ALT key
#define VK_PAUSE 0x13 // PAUSE key
#define VK_CAPITAL 0x14 // CAPS LOCK key
#define VK_KANA 0x15 // Input Method Editor (IME) Kana mode
#define VK_HANGUL 0x15 // IME Hangul mode
#define VK_JUNJA 0x17 // IME Junja mode
#define VK_FINAL 0x18 // IME final mode
#define VK_HANJA 0x19 // IME Hanja mode 
#define VK_KANJI 0x19 // IME Kanji mode
#define VK_ESCAPE 0x1B // ESC key
#define VK_CONVERT 0x1C // IME convert
#define VK_NONCONVERT 0x1D // IME nonconvert
#define VK_ACCEPT 0x1E // IME accept
#define VK_MODECHANGE 0x1F // IME mode change request
#define VK_SPACE 0x20 // SPACE key
#define VK_PRIOR 0x21 // PAGE UP key
#define VK_NEXT 0x22 // PAGE DOWN key
#define VK_END 0x23 // END key
#define VK_HOME 0x24 // HOME key
#define VK_LEFT 0x25 // LEFT ARROW key
#define VK_UP 0x26 // UP ARROW key
#define VK_RIGHT 0x27 // RIGHT ARROW key
#define VK_DOWN 0x28 // DOWN ARROW key
#define VK_SELECT 0x29 // SELECT key
#define VK_PRINT 0x2A // PRINT key
#define VK_EXECUTE 0x2B // EXECUTE key
#define VK_SNAPSHOT 0x2C // PRINT SCREEN key
#define VK_INSERT 0x2D // INS key
#define VK_DELETE 0x2E // DEL key
#define VK_HELP 0x2F // HELP key
// Windows 2000/XP: For any country/region, the '.' key
#define VK_OEM_PERIOD 0xBE
#endif

using namespace WebCore;

namespace WebKit {
    
void WebPage::platformInitialize()
{
    Settings* settings = m_page->settings();

    // If accelerated compositing is enabled, we want to be in force-compositing mode, so that we don't switch between composited/non-composited state.
    settings->setForceCompositingMode(true);
}

void WebPage::platformPreferencesDidChange(const WebPreferencesStore&)
{
}

static const unsigned CtrlKey = 1 << 0;
static const unsigned AltKey = 1 << 1;
static const unsigned ShiftKey = 1 << 2;

struct KeyDownEntry {
    unsigned virtualKey;
    unsigned modifiers;
    const char* name;
};

struct KeyPressEntry {
    unsigned charCode;
    unsigned modifiers;
    const char* name;
};

static const KeyDownEntry keyDownEntries[] = {
    { VK_LEFT,   0,                  "MoveLeft"                                    },
    { VK_LEFT,   ShiftKey,           "MoveLeftAndModifySelection"                  },
    { VK_LEFT,   CtrlKey,            "MoveWordLeft"                                },
    { VK_LEFT,   CtrlKey | ShiftKey, "MoveWordLeftAndModifySelection"              },
    { VK_RIGHT,  0,                  "MoveRight"                                   },
    { VK_RIGHT,  ShiftKey,           "MoveRightAndModifySelection"                 },
    { VK_RIGHT,  CtrlKey,            "MoveWordRight"                               },
    { VK_RIGHT,  CtrlKey | ShiftKey, "MoveWordRightAndModifySelection"             },
    { VK_UP,     0,                  "MoveUp"                                      },
    { VK_UP,     ShiftKey,           "MoveUpAndModifySelection"                    },
    { VK_PRIOR,  ShiftKey,           "MovePageUpAndModifySelection"                },
    { VK_DOWN,   0,                  "MoveDown"                                    },
    { VK_DOWN,   ShiftKey,           "MoveDownAndModifySelection"                  },
    { VK_NEXT,   ShiftKey,           "MovePageDownAndModifySelection"              },
    { VK_PRIOR,  0,                  "MovePageUp"                                  },
    { VK_NEXT,   0,                  "MovePageDown"                                },
    { VK_HOME,   0,                  "MoveToBeginningOfLine"                       },
    { VK_HOME,   ShiftKey,           "MoveToBeginningOfLineAndModifySelection"     },
    { VK_HOME,   CtrlKey,            "MoveToBeginningOfDocument"                   },
    { VK_HOME,   CtrlKey | ShiftKey, "MoveToBeginningOfDocumentAndModifySelection" },
    
    { VK_END,    0,                  "MoveToEndOfLine"                             },
    { VK_END,    ShiftKey,           "MoveToEndOfLineAndModifySelection"           },
    { VK_END,    CtrlKey,            "MoveToEndOfDocument"                         },
    { VK_END,    CtrlKey | ShiftKey, "MoveToEndOfDocumentAndModifySelection"       },
    
    { VK_BACK,   0,                  "DeleteBackward"                              },
    { VK_BACK,   ShiftKey,           "DeleteBackward"                              },
    { VK_DELETE, 0,                  "DeleteForward"                               },
    { VK_BACK,   CtrlKey,            "DeleteWordBackward"                          },
    { VK_DELETE, CtrlKey,            "DeleteWordForward"                           },
    
    { 'B',       CtrlKey,            "ToggleBold"                                  },
    { 'I',       CtrlKey,            "ToggleItalic"                                },
    
    { VK_ESCAPE, 0,                  "Cancel"                                      },
    { VK_OEM_PERIOD, CtrlKey,        "Cancel"                                      },
    { VK_TAB,    0,                  "InsertTab"                                   },
    { VK_TAB,    ShiftKey,           "InsertBacktab"                               },
    { VK_RETURN, 0,                  "InsertNewline"                               },
    { VK_RETURN, CtrlKey,            "InsertNewline"                               },
    { VK_RETURN, AltKey,             "InsertNewline"                               },
    { VK_RETURN, ShiftKey,           "InsertNewline"                               },
    { VK_RETURN, AltKey | ShiftKey,  "InsertNewline"                               },
    
    // It's not quite clear whether clipboard shortcuts and Undo/Redo should be handled
    // in the application or in WebKit. We chose WebKit.
    { 'C',       CtrlKey,            "Copy"                                        },
    { 'V',       CtrlKey,            "Paste"                                       },
    { 'X',       CtrlKey,            "Cut"                                         },
    { 'A',       CtrlKey,            "SelectAll"                                   },
    { VK_INSERT, CtrlKey,            "Copy"                                        },
    { VK_DELETE, ShiftKey,           "Cut"                                         },
    { VK_INSERT, ShiftKey,           "Paste"                                       },
    { 'Z',       CtrlKey,            "Undo"                                        },
    { 'Z',       CtrlKey | ShiftKey, "Redo"                                        },
};

static const KeyPressEntry keyPressEntries[] = {
    { '\t',   0,                  "InsertTab"                                   },
    { '\t',   ShiftKey,           "InsertBacktab"                               },
    { '\r',   0,                  "InsertNewline"                               },
    { '\r',   CtrlKey,            "InsertNewline"                               },
    { '\r',   AltKey,             "InsertNewline"                               },
    { '\r',   ShiftKey,           "InsertNewline"                               },
    { '\r',   AltKey | ShiftKey,  "InsertNewline"                               },
};

const char* WebPage::interpretKeyEvent(const KeyboardEvent* evt)
{
    ASSERT(evt->type() == eventNames().keydownEvent || evt->type() == eventNames().keypressEvent);
    
    static HashMap<int, const char*>* keyDownCommandsMap = 0;
    static HashMap<int, const char*>* keyPressCommandsMap = 0;
    
    if (!keyDownCommandsMap) {
        keyDownCommandsMap = new HashMap<int, const char*>;
        keyPressCommandsMap = new HashMap<int, const char*>;
        
        for (unsigned i = 0; i < (sizeof(keyDownEntries) / sizeof(keyDownEntries[0])); i++)
            keyDownCommandsMap->set(keyDownEntries[i].modifiers << 16 | keyDownEntries[i].virtualKey, keyDownEntries[i].name);
        
        for (unsigned i = 0; i < (sizeof(keyPressEntries) / sizeof(keyPressEntries[0])); i++)
            keyPressCommandsMap->set(keyPressEntries[i].modifiers << 16 | keyPressEntries[i].charCode, keyPressEntries[i].name);
    }
    
    unsigned modifiers = 0;
    if (evt->shiftKey())
        modifiers |= ShiftKey;
    if (evt->altKey())
        modifiers |= AltKey;
    if (evt->ctrlKey())
        modifiers |= CtrlKey;
    
    if (evt->type() == eventNames().keydownEvent) {
        int mapKey = modifiers << 16 | evt->keyEvent()->windowsVirtualKeyCode();
        return mapKey ? keyDownCommandsMap->get(mapKey) : 0;
    }
    
    int mapKey = modifiers << 16 | evt->charCode();
    return mapKey ? keyPressCommandsMap->get(mapKey) : 0;
}

static inline void scroll(Page* page, ScrollDirection direction, ScrollGranularity granularity)
{
    page->focusController()->focusedOrMainFrame()->eventHandler()->scrollRecursively(direction, granularity);
}

static inline void logicalScroll(Page* page, ScrollLogicalDirection direction, ScrollGranularity granularity)
{
    page->focusController()->focusedOrMainFrame()->eventHandler()->logicalScrollRecursively(direction, granularity);
}

bool WebPage::performDefaultBehaviorForKeyEvent(const WebKeyboardEvent& keyboardEvent)
{
    if (keyboardEvent.type() != WebEvent::KeyDown && keyboardEvent.type() != WebEvent::RawKeyDown)
        return false;

    switch (keyboardEvent.windowsVirtualKeyCode()) {
    case VK_BACK:
        if (keyboardEvent.shiftKey())
            m_page->goForward();
        else
            m_page->goBack();
        break;
    case VK_SPACE:
        logicalScroll(m_page.get(), keyboardEvent.shiftKey() ? ScrollBlockDirectionBackward : ScrollBlockDirectionForward, ScrollByPage);
        break;
    case VK_LEFT:
        scroll(m_page.get(), ScrollLeft, ScrollByLine);
        break;
    case VK_RIGHT:
        scroll(m_page.get(), ScrollRight, ScrollByLine);
        break;
    case VK_UP:
        scroll(m_page.get(), ScrollUp, ScrollByLine);
        break;
    case VK_DOWN:
        scroll(m_page.get(), ScrollDown, ScrollByLine);
        break;
    case VK_HOME:
        logicalScroll(m_page.get(), ScrollBlockDirectionBackward, ScrollByDocument);
        break;
    case VK_END:
        logicalScroll(m_page.get(), ScrollBlockDirectionForward, ScrollByDocument);
        break;
    case VK_PRIOR:
        logicalScroll(m_page.get(), ScrollBlockDirectionBackward, ScrollByPage);
        break;
    case VK_NEXT:
        logicalScroll(m_page.get(), ScrollBlockDirectionForward, ScrollByPage);
        break;
    default:
        return false;
    }

    return true;
}

bool WebPage::platformHasLocalDataForURL(const KURL&)
{
    notImplemented();
    return false;
}

String WebPage::cachedResponseMIMETypeForURL(const KURL&)
{
    notImplemented();
    return String();
}

bool WebPage::platformCanHandleRequest(const ResourceRequest&)
{
    notImplemented();
    return true;
}

String WebPage::cachedSuggestedFilenameForURL(const KURL&)
{
    notImplemented();
    return String();
}

PassRefPtr<SharedBuffer> WebPage::cachedResponseDataForURL(const KURL&)
{
    notImplemented();
    return 0;
}

} // namespace WebKit
