<commit_before>/* bzflag
 * Copyright (c) 1993 - 2007 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "SDLPlatformFactory.h"
#include "SDLMedia.h"
#include "SDLDisplay.h"
#include "SDLJoystick.h"
#include "EvdevJoystick.h"

PlatformFactory* PlatformFactory::getInstance()
{
  if (!instance)
    instance = new SdlPlatformFactory;
  return instance;
}

SdlPlatformFactory::SdlPlatformFactory()
{
  // do nothing
}

SdlPlatformFactory::~SdlPlatformFactory()
{
  // do nothing
}

BzfDisplay* SdlPlatformFactory::createDisplay(const char*, const char*)
{
  SDLDisplay* display = new SDLDisplay();
  if (!display || !display->isValid()) {
    delete display;
    return NULL;
  }
  return display;
}

BzfVisual* SdlPlatformFactory::createVisual(const BzfDisplay* display)
{
  return new SDLVisual((const SDLDisplay*)display);
}

BzfWindow* SdlPlatformFactory::createWindow(const BzfDisplay* display,
					    BzfVisual* visual)
{
  return new SDLWindow((const SDLDisplay*)display, (SDLVisual*)visual);
}

BzfMedia* SdlPlatformFactory::createMedia()
{
  return new SDLMedia;
}

BzfJoystick* SdlPlatformFactory::createJoystick()
{
  /* Use EvdevJoystick instead of SDLJoystick if we can.
   * It has minor improvements in axis mapping and joystick
   * enumeration, but the big selling point so far is that it
   * supports force feedback.
   */
#ifdef HAVE_LINUX_INPUT_H
  if (EvdevJoystick::isEvdevAvailable())
    return new EvdevJoystick;
#endif

  return new SDLJoystick;
}
// Local Variables: ***
// mode:C++ ***
// tab-width: 8 ***
// c-basic-offset: 2 ***
// indent-tabs-mode: t ***
// End: ***
// ex: shiftwidth=2 tabstop=8
<commit_msg>include necessary headers<commit_after>/* bzflag
 * Copyright (c) 1993 - 2007 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "SDLPlatformFactory.h"
#include "SDLMedia.h"
#include "SDLDisplay.h"
#include "SDLJoystick.h"
#include "SDLVisual.h"
#include "SDLWindow.h"
#include "EvdevJoystick.h"

PlatformFactory* PlatformFactory::getInstance()
{
  if (!instance)
    instance = new SdlPlatformFactory;
  return instance;
}

SdlPlatformFactory::SdlPlatformFactory()
{
  // do nothing
}

SdlPlatformFactory::~SdlPlatformFactory()
{
  // do nothing
}

BzfDisplay* SdlPlatformFactory::createDisplay(const char*, const char*)
{
  SDLDisplay* display = new SDLDisplay();
  if (!display || !display->isValid()) {
    delete display;
    return NULL;
  }
  return display;
}

BzfVisual* SdlPlatformFactory::createVisual(const BzfDisplay* display)
{
  return new SDLVisual((const SDLDisplay*)display);
}

BzfWindow* SdlPlatformFactory::createWindow(const BzfDisplay* display,
					    BzfVisual* visual)
{
  return new SDLWindow((const SDLDisplay*)display, (SDLVisual*)visual);
}

BzfMedia* SdlPlatformFactory::createMedia()
{
  return new SDLMedia;
}

BzfJoystick* SdlPlatformFactory::createJoystick()
{
  /* Use EvdevJoystick instead of SDLJoystick if we can.
   * It has minor improvements in axis mapping and joystick
   * enumeration, but the big selling point so far is that it
   * supports force feedback.
   */
#ifdef HAVE_LINUX_INPUT_H
  if (EvdevJoystick::isEvdevAvailable())
    return new EvdevJoystick;
#endif

  return new SDLJoystick;
}
// Local Variables: ***
// mode:C++ ***
// tab-width: 8 ***
// c-basic-offset: 2 ***
// indent-tabs-mode: t ***
// End: ***
// ex: shiftwidth=2 tabstop=8
<|endoftext|>


<commit_before>/* bzflag
 * Copyright (c) 1993 - 2005 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "WinPlatformFactory.h"
#ifdef HAVE_SDL
#include "SDLMedia.h"
#include "SDLDisplay.h"
#include "SDLJoystick.h"
#endif
#include "DXJoystick.h"
#ifdef HAVE_DSOUND_H
#include "WinMedia.h"
#endif
#include "WinDisplay.h"
#include "WinVisual.h"
#include "WinWindow.h"
#include "WinJoystick.h"
#include "StateDatabase.h"

PlatformFactory*	PlatformFactory::getInstance()
{
  if (!instance) instance = new WinPlatformFactory;
  return instance;
}

#ifdef HAVE_SDL
SDLWindow*		WinPlatformFactory::sdlWindow = NULL;
#endif
WinWindow*		WinPlatformFactory::winWindow = NULL;

WinPlatformFactory::WinPlatformFactory()
{
  // do nothing
}

WinPlatformFactory::~WinPlatformFactory()
{
  // do nothing
}

BzfDisplay *WinPlatformFactory::createDisplay(const char* name,
					      const char* videoFormat)
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLVideo") && BZDB.isTrue("SDLVideo"))
    useNative = false;
#endif

  // Just to stop compiler complaining about un-use of name & videoFormat
  if (name == NULL && videoFormat == NULL)
    ;

  BzfDisplay *display;
  if (useNative) {
    WinDisplay* winDisplay = new WinDisplay(name, videoFormat);
    display                = winDisplay;
  } else {
#ifdef HAVE_SDL
    SDLDisplay* sdlDisplay = new SDLDisplay();
    display                = sdlDisplay;
#else
    display                = NULL;
#endif
  }
  if (!display || !display->isValid()) {
    delete display;
    display = NULL;
  }
  return display;
}

BzfVisual*		WinPlatformFactory::createVisual(
				const BzfDisplay* display)
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLVideo") && BZDB.isTrue("SDLVideo"))
    useNative = false;
#endif

  if (useNative)
    return new WinVisual((const WinDisplay*)display);
  else
#ifdef HAVE_SDL
    return new SDLVisual((const SDLDisplay*)display);
#else
    return NULL;
#endif
}

BzfWindow*		WinPlatformFactory::createWindow(
				const BzfDisplay* display, BzfVisual* visual)
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLVideo") && BZDB.isTrue("SDLVideo"))
    useNative = false;
#endif

  if (useNative) {
    winWindow = new WinWindow((const WinDisplay*)display, (WinVisual*)visual);
    return winWindow;
  } else {
#ifdef HAVE_SDL
    sdlWindow = new SDLWindow((const SDLDisplay*)display, (SDLVisual*)visual);
    return sdlWindow;
#else
    return NULL;
#endif
  }
}

BzfMedia*		WinPlatformFactory::createMedia()
{
  bool useNative = true;
#ifndef HAVE_DSOUND_H
  useNative = false;
#endif
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLAudio") && BZDB.isTrue("SDLAudio"))
    useNative = false;
#endif

  if (useNative) {
#ifdef HAVE_DSOUND_H
    return new WinMedia(window);
#else
    return NULL;
#endif
  } else {
#ifdef HAVE_SDL
    return new SDLMedia();
#else
    return NULL;
#endif
  }
}

BzfJoystick*		WinPlatformFactory::createJoystick()
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLJoystick") && BZDB.isTrue("SDLJoystick"))
    useNative = false;
#endif
  if (useNative) {
#if defined(USE_DINPUT)
    return new DXJoystick();
#else
    return new WinJoystick();
#endif
  } else {
#if defined(HAVE_SDL)
    return new SDLJoystick();
#else
    return NULL;
#endif
  }
}

// Local Variables: ***
// mode:C++ ***
// tab-width: 8 ***
// c-basic-offset: 2 ***
// indent-tabs-mode: t ***
// End: ***
// ex: shiftwidth=2 tabstop=8

<commit_msg>warning<commit_after>/* bzflag
 * Copyright (c) 1993 - 2005 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "WinPlatformFactory.h"
#ifdef HAVE_SDL
#include "SDLMedia.h"
#include "SDLDisplay.h"
#include "SDLJoystick.h"
#endif
#include "DXJoystick.h"
#ifdef HAVE_DSOUND_H
#include "WinMedia.h"
#endif
#include "WinDisplay.h"
#include "WinVisual.h"
#include "WinWindow.h"
#include "WinJoystick.h"
#include "StateDatabase.h"

PlatformFactory*	PlatformFactory::getInstance()
{
  if (!instance) instance = new WinPlatformFactory;
  return instance;
}

#ifdef HAVE_SDL
SDLWindow*		WinPlatformFactory::sdlWindow = NULL;
#endif
WinWindow*		WinPlatformFactory::winWindow = NULL;

WinPlatformFactory::WinPlatformFactory()
{
  // do nothing
}

WinPlatformFactory::~WinPlatformFactory()
{
  // do nothing
}

BzfDisplay *WinPlatformFactory::createDisplay(const char* name,
					      const char* videoFormat)
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLVideo") && BZDB.isTrue("SDLVideo"))
    useNative = false;
#endif

  // Just to stop compiler complaining about un-use of name & videoFormat
  if (name == NULL && videoFormat == NULL) {};

  BzfDisplay *display;
  if (useNative) {
    WinDisplay* winDisplay = new WinDisplay(name, videoFormat);
    display                = winDisplay;
  } else {
#ifdef HAVE_SDL
    SDLDisplay* sdlDisplay = new SDLDisplay();
    display                = sdlDisplay;
#else
    display                = NULL;
#endif
  }
  if (!display || !display->isValid()) {
    delete display;
    display = NULL;
  }
  return display;
}

BzfVisual*		WinPlatformFactory::createVisual(
				const BzfDisplay* display)
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLVideo") && BZDB.isTrue("SDLVideo"))
    useNative = false;
#endif

  if (useNative)
    return new WinVisual((const WinDisplay*)display);
  else
#ifdef HAVE_SDL
    return new SDLVisual((const SDLDisplay*)display);
#else
    return NULL;
#endif
}

BzfWindow*		WinPlatformFactory::createWindow(
				const BzfDisplay* display, BzfVisual* visual)
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLVideo") && BZDB.isTrue("SDLVideo"))
    useNative = false;
#endif

  if (useNative) {
    winWindow = new WinWindow((const WinDisplay*)display, (WinVisual*)visual);
    return winWindow;
  } else {
#ifdef HAVE_SDL
    sdlWindow = new SDLWindow((const SDLDisplay*)display, (SDLVisual*)visual);
    return sdlWindow;
#else
    return NULL;
#endif
  }
}

BzfMedia*		WinPlatformFactory::createMedia()
{
  bool useNative = true;
#ifndef HAVE_DSOUND_H
  useNative = false;
#endif
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLAudio") && BZDB.isTrue("SDLAudio"))
    useNative = false;
#endif

  if (useNative) {
#ifdef HAVE_DSOUND_H
    return new WinMedia(window);
#else
    return NULL;
#endif
  } else {
#ifdef HAVE_SDL
    return new SDLMedia();
#else
    return NULL;
#endif
  }
}

BzfJoystick*		WinPlatformFactory::createJoystick()
{
  bool useNative = true;
#ifdef HAVE_SDL
  if (BZDB.isSet("SDLJoystick") && BZDB.isTrue("SDLJoystick"))
    useNative = false;
#endif
  if (useNative) {
#if defined(USE_DINPUT)
    return new DXJoystick();
#else
    return new WinJoystick();
#endif
  } else {
#if defined(HAVE_SDL)
    return new SDLJoystick();
#else
    return NULL;
#endif
  }
}

// Local Variables: ***
// mode:C++ ***
// tab-width: 8 ***
// c-basic-offset: 2 ***
// indent-tabs-mode: t ***
// End: ***
// ex: shiftwidth=2 tabstop=8

<|endoftext|>


<commit_before>/* libs/graphics/ports/SkFontHost_fontconfig.cpp
**
** Copyright 2008, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**     http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/

// -----------------------------------------------------------------------------
// This file provides implementations of the font resolution members of
// SkFontHost by using the fontconfig[1] library. Fontconfig is usually found
// on Linux systems and handles configuration, parsing and caching issues
// involved with enumerating and matching fonts.
//
// [1] http://fontconfig.org
// -----------------------------------------------------------------------------

#include <map>
#include <string>

#include <fontconfig/fontconfig.h>

#include "SkFontHost.h"
#include "SkStream.h"

// This is an extern from SkFontHost_FreeType
SkTypeface::Style find_name_and_style(SkStream* stream, SkString* name);

// -----------------------------------------------------------------------------
// The rest of Skia requires that fonts be identified by a unique unsigned id
// and that we be able to load them given the id. What we actually get from
// fontconfig is the filename of the font so we keep a locked map from
// filenames to fileid numbers and back.
//
// Note that there's also a unique id in the SkTypeface. This is unique over
// both filename and style. Thus we encode that id as (fileid << 8) | style.
// Although truetype fonts can support multiple faces in a single file, at the
// moment Skia doesn't.
// -----------------------------------------------------------------------------
static SkMutex global_fc_map_lock;
static std::map<std::string, unsigned> global_fc_map;
static std::map<unsigned, std::string> global_fc_map_inverted;
static std::map<uint32_t, SkTypeface *> global_fc_typefaces;
static unsigned global_fc_map_next_id = 0;

// This is the maximum size of the font cache.
static const unsigned kFontCacheMemoryBudget = 2 * 1024 * 1024;  // 2MB

static unsigned UniqueIdToFileId(unsigned uniqueid)
{
    return uniqueid >> 8;
}

static SkTypeface::Style UniqueIdToStyle(unsigned uniqueid)
{
    return static_cast<SkTypeface::Style>(uniqueid & 0xff);
}

static unsigned FileIdAndStyleToUniqueId(unsigned fileid,
                                         SkTypeface::Style style)
{
    SkASSERT((style & 0xff) == style);
    return (fileid << 8) | static_cast<int>(style);
}

// -----------------------------------------------------------------------------
// Normally we only return exactly the font asked for. In last-resort cases,
// the request is for one of the basic font names "Sans", "Serif" or
// "Monospace". This function tells you whether a given request is for such a
// fallback.
// -----------------------------------------------------------------------------
static bool IsFallbackFontAllowed(const char* request)
{
    return strcmp(request, "Sans") == 0 ||
           strcmp(request, "Serif") == 0 ||
           strcmp(request, "Monospace") == 0;
}

class FontConfigTypeface : public SkTypeface {
public:
    FontConfigTypeface(Style style, uint32_t id)
        : SkTypeface(style, id)
    { }
};

// -----------------------------------------------------------------------------
// Find a matching font where @type (one of FC_*) is equal to @value. For a
// list of types, see http://fontconfig.org/fontconfig-devel/x19.html#AEN27.
// The variable arguments are a list of triples, just like the first three
// arguments, and must be NULL terminated.
//
// For example,
//   FontMatchString(FC_FILE, FcTypeString, "/usr/share/fonts/myfont.ttf",
//                   NULL);
// -----------------------------------------------------------------------------
static FcPattern* FontMatch(const char* type, FcType vtype, const void* value,
                            ...)
{
    va_list ap;
    va_start(ap, value);

    FcPattern* pattern = FcPatternCreate();
    const char* family_requested = NULL;

    for (;;) {
        FcValue fcvalue;
        fcvalue.type = vtype;
        switch (vtype) {
            case FcTypeString:
                fcvalue.u.s = (FcChar8*) value;
                break;
            case FcTypeInteger:
                fcvalue.u.i = (int)(intptr_t)value;
                break;
            default:
                SkASSERT(!"FontMatch unhandled type");
        }
        FcPatternAdd(pattern, type, fcvalue, 0);

        if (vtype == FcTypeString && strcmp(type, FC_FAMILY) == 0)
            family_requested = (const char*) value;

        type = va_arg(ap, const char *);
        if (!type)
            break;
        // FcType is promoted to int when passed through ...
        vtype = static_cast<FcType>(va_arg(ap, int));
        value = va_arg(ap, const void *);
    };
    va_end(ap);

    FcConfigSubstitute(0, pattern, FcMatchPattern);
    FcDefaultSubstitute(pattern);

    // Font matching:
    // CSS often specifies a fallback list of families:
    //    font-family: a, b, c, serif;
    // However, fontconfig will always do its best to find *a* font when asked
    // for something so we need a way to tell if the match which it has found is
    // "good enough" for us. Otherwise, we can return NULL which gets piped up
    // and lets WebKit know to try the next CSS family name. However, fontconfig
    // configs allow substitutions (mapping "Arial -> Helvetica" etc) and we
    // wish to support that.
    //
    // Thus, if a specific family is requested we set @family_requested. Then we
    // record two strings: the family name after config processing and the
    // family name after resolving. If the two are equal, it's a good match.
    //
    // So consider the case where a user has mapped Arial to Helvetica in their
    // config.
    //    requested family: "Arial"
    //    post_config_family: "Helvetica"
    //    post_match_family: "Helvetica"
    //      -> good match
    //
    // and for a missing font:
    //    requested family: "Monaco"
    //    post_config_family: "Monaco"
    //    post_match_family: "Times New Roman"
    //      -> BAD match
    //
    // However, we special-case fallback fonts; see IsFallbackFontAllowed().
    FcChar8* post_config_family;
    FcPatternGetString(pattern, FC_FAMILY, 0, &post_config_family);

    FcResult result;
    FcPattern* match = FcFontMatch(0, pattern, &result);
    if (!match) {
        FcPatternDestroy(pattern);
        return NULL;
    }

    FcChar8* post_match_family;
    FcPatternGetString(match, FC_FAMILY, 0, &post_match_family);
    const bool family_names_match =
        !family_requested ?
        true :
        strcasecmp((char *)post_config_family, (char *)post_match_family) == 0;

    FcPatternDestroy(pattern);

    if (!family_names_match && !IsFallbackFontAllowed(family_requested)) {
        FcPatternDestroy(match);
        return NULL;
    }

    return match;
}

// -----------------------------------------------------------------------------
// Check to see if the filename has already been assigned a fileid and, if so,
// use it. Otherwise, assign one. Return the resulting fileid.
// -----------------------------------------------------------------------------
static unsigned FileIdFromFilename(const char* filename)
{
    SkAutoMutexAcquire ac(global_fc_map_lock);

    std::map<std::string, unsigned>::const_iterator i =
        global_fc_map.find(filename);
    if (i == global_fc_map.end()) {
        const unsigned fileid = global_fc_map_next_id++;
        global_fc_map[filename] = fileid;
        global_fc_map_inverted[fileid] = filename;
        return fileid;
    } else {
        return i->second;
    }
}

// static
SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace,
                                       const char familyName[],
                                       const void* data, size_t bytelength,
                                       SkTypeface::Style style)
{
    const char* resolved_family_name = NULL;
    FcPattern* face_match = NULL;

    {
        SkAutoMutexAcquire ac(global_fc_map_lock);
        FcInit();
    }

    if (familyFace) {
        // Here we use the inverted global id map to find the filename from the
        // SkTypeface object. Given the filename we can ask fontconfig for the
        // familyname of the font.
        SkAutoMutexAcquire ac(global_fc_map_lock);

        const unsigned fileid = UniqueIdToFileId(familyFace->uniqueID());
        std::map<unsigned, std::string>::const_iterator i =
            global_fc_map_inverted.find(fileid);
        if (i == global_fc_map_inverted.end())
            return NULL;

        FcInit();
        face_match = FontMatch(FC_FILE, FcTypeString, i->second.c_str(),
                               NULL);

        if (!face_match)
            return NULL;
        FcChar8* family;
        if (FcPatternGetString(face_match, FC_FAMILY, 0, &family)) {
            FcPatternDestroy(face_match);
            return NULL;
        }
        // At this point, @family is pointing into the @face_match object so we
        // cannot release it yet.

        resolved_family_name = reinterpret_cast<char*>(family);
    } else if (familyName) {
        resolved_family_name = familyName;
    } else {
        return NULL;
    }

    // At this point, we have a resolved_family_name from somewhere
    SkASSERT(resolved_family_name);

    const int bold = style & SkTypeface::kBold ?
                     FC_WEIGHT_BOLD : FC_WEIGHT_NORMAL;
    const int italic = style & SkTypeface::kItalic ?
                       FC_SLANT_ITALIC : FC_SLANT_ROMAN;
    FcPattern* match = FontMatch(FC_FAMILY, FcTypeString, resolved_family_name,
                                 FC_WEIGHT, FcTypeInteger, bold,
                                 FC_SLANT, FcTypeInteger, italic,
                                 NULL);
    if (face_match)
        FcPatternDestroy(face_match);

    if (!match)
        return NULL;

    FcChar8* filename;
    if (FcPatternGetString(match, FC_FILE, 0, &filename) != FcResultMatch) {
        FcPatternDestroy(match);
        return NULL;
    }
    // Now @filename is pointing into @match

    const unsigned fileid = FileIdFromFilename(reinterpret_cast<char*>(filename));
    const unsigned id = FileIdAndStyleToUniqueId(fileid, style);
    SkTypeface* typeface = SkNEW_ARGS(FontConfigTypeface, (style, id));
    FcPatternDestroy(match);

    {
        SkAutoMutexAcquire ac(global_fc_map_lock);
        global_fc_typefaces[id] = typeface;
    }

    return typeface;
}

// static
SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream)
{
    SkASSERT(!"SkFontHost::CreateTypefaceFromStream unimplemented");
    return NULL;
}

// static
SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[])
{
    SkASSERT(!"SkFontHost::CreateTypefaceFromFile unimplemented");
    return NULL;
}

// static
bool SkFontHost::ValidFontID(SkFontID uniqueID) {
    SkAutoMutexAcquire ac(global_fc_map_lock);
    return global_fc_typefaces.find(uniqueID) != global_fc_typefaces.end();
}

// static
SkStream* SkFontHost::OpenStream(uint32_t id)
{
    SkAutoMutexAcquire ac(global_fc_map_lock);
    const unsigned fileid = UniqueIdToFileId(id);

    std::map<unsigned, std::string>::const_iterator i =
        global_fc_map_inverted.find(fileid);
    if (i == global_fc_map_inverted.end())
        return NULL;

    return SkNEW_ARGS(SkFILEStream, (i->second.c_str()));
}

size_t SkFontHost::GetFileName(SkFontID fontID, char path[], size_t length,
                               int32_t* index) {
    SkAutoMutexAcquire ac(global_fc_map_lock);
    const unsigned fileid = UniqueIdToFileId(id);

    std::map<unsigned, std::string>::const_iterator i =
    global_fc_map_inverted.find(fileid);
    if (i == global_fc_map_inverted.end()) {
        return 0;
    }

    const std::string& str = i->second;
    if (path) {
        memcpy(path, str.c_str(), SkMin32(str.size(), length));
    }
    if (index) {    // TODO: check if we're in a TTC
        *index = 0;
    }
    return str.size();
}

void SkFontHost::Serialize(const SkTypeface*, SkWStream*) {
    SkASSERT(!"SkFontHost::Serialize unimplemented");
}

SkTypeface* SkFontHost::Deserialize(SkStream* stream) {
    SkASSERT(!"SkFontHost::Deserialize unimplemented");
    return NULL;
}

// static
uint32_t SkFontHost::NextLogicalFont(SkFontID fontID) {
    // We don't handle font fallback, WebKit does.
    return 0;
}

///////////////////////////////////////////////////////////////////////////////

size_t SkFontHost::ShouldPurgeFontCache(size_t sizeAllocatedSoFar)
{
    if (sizeAllocatedSoFar > kFontCacheMemoryBudget)
        return sizeAllocatedSoFar - kFontCacheMemoryBudget;
    else
        return 0;   // nothing to do
}
<commit_msg>fix compile-error, mismatch between fontID and id<commit_after>/* libs/graphics/ports/SkFontHost_fontconfig.cpp
**
** Copyright 2008, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**     http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/

// -----------------------------------------------------------------------------
// This file provides implementations of the font resolution members of
// SkFontHost by using the fontconfig[1] library. Fontconfig is usually found
// on Linux systems and handles configuration, parsing and caching issues
// involved with enumerating and matching fonts.
//
// [1] http://fontconfig.org
// -----------------------------------------------------------------------------

#include <map>
#include <string>

#include <fontconfig/fontconfig.h>

#include "SkFontHost.h"
#include "SkStream.h"

// This is an extern from SkFontHost_FreeType
SkTypeface::Style find_name_and_style(SkStream* stream, SkString* name);

// -----------------------------------------------------------------------------
// The rest of Skia requires that fonts be identified by a unique unsigned id
// and that we be able to load them given the id. What we actually get from
// fontconfig is the filename of the font so we keep a locked map from
// filenames to fileid numbers and back.
//
// Note that there's also a unique id in the SkTypeface. This is unique over
// both filename and style. Thus we encode that id as (fileid << 8) | style.
// Although truetype fonts can support multiple faces in a single file, at the
// moment Skia doesn't.
// -----------------------------------------------------------------------------
static SkMutex global_fc_map_lock;
static std::map<std::string, unsigned> global_fc_map;
static std::map<unsigned, std::string> global_fc_map_inverted;
static std::map<uint32_t, SkTypeface *> global_fc_typefaces;
static unsigned global_fc_map_next_id = 0;

// This is the maximum size of the font cache.
static const unsigned kFontCacheMemoryBudget = 2 * 1024 * 1024;  // 2MB

static unsigned UniqueIdToFileId(unsigned uniqueid)
{
    return uniqueid >> 8;
}

static SkTypeface::Style UniqueIdToStyle(unsigned uniqueid)
{
    return static_cast<SkTypeface::Style>(uniqueid & 0xff);
}

static unsigned FileIdAndStyleToUniqueId(unsigned fileid,
                                         SkTypeface::Style style)
{
    SkASSERT((style & 0xff) == style);
    return (fileid << 8) | static_cast<int>(style);
}

// -----------------------------------------------------------------------------
// Normally we only return exactly the font asked for. In last-resort cases,
// the request is for one of the basic font names "Sans", "Serif" or
// "Monospace". This function tells you whether a given request is for such a
// fallback.
// -----------------------------------------------------------------------------
static bool IsFallbackFontAllowed(const char* request)
{
    return strcmp(request, "Sans") == 0 ||
           strcmp(request, "Serif") == 0 ||
           strcmp(request, "Monospace") == 0;
}

class FontConfigTypeface : public SkTypeface {
public:
    FontConfigTypeface(Style style, uint32_t id)
        : SkTypeface(style, id)
    { }
};

// -----------------------------------------------------------------------------
// Find a matching font where @type (one of FC_*) is equal to @value. For a
// list of types, see http://fontconfig.org/fontconfig-devel/x19.html#AEN27.
// The variable arguments are a list of triples, just like the first three
// arguments, and must be NULL terminated.
//
// For example,
//   FontMatchString(FC_FILE, FcTypeString, "/usr/share/fonts/myfont.ttf",
//                   NULL);
// -----------------------------------------------------------------------------
static FcPattern* FontMatch(const char* type, FcType vtype, const void* value,
                            ...)
{
    va_list ap;
    va_start(ap, value);

    FcPattern* pattern = FcPatternCreate();
    const char* family_requested = NULL;

    for (;;) {
        FcValue fcvalue;
        fcvalue.type = vtype;
        switch (vtype) {
            case FcTypeString:
                fcvalue.u.s = (FcChar8*) value;
                break;
            case FcTypeInteger:
                fcvalue.u.i = (int)(intptr_t)value;
                break;
            default:
                SkASSERT(!"FontMatch unhandled type");
        }
        FcPatternAdd(pattern, type, fcvalue, 0);

        if (vtype == FcTypeString && strcmp(type, FC_FAMILY) == 0)
            family_requested = (const char*) value;

        type = va_arg(ap, const char *);
        if (!type)
            break;
        // FcType is promoted to int when passed through ...
        vtype = static_cast<FcType>(va_arg(ap, int));
        value = va_arg(ap, const void *);
    };
    va_end(ap);

    FcConfigSubstitute(0, pattern, FcMatchPattern);
    FcDefaultSubstitute(pattern);

    // Font matching:
    // CSS often specifies a fallback list of families:
    //    font-family: a, b, c, serif;
    // However, fontconfig will always do its best to find *a* font when asked
    // for something so we need a way to tell if the match which it has found is
    // "good enough" for us. Otherwise, we can return NULL which gets piped up
    // and lets WebKit know to try the next CSS family name. However, fontconfig
    // configs allow substitutions (mapping "Arial -> Helvetica" etc) and we
    // wish to support that.
    //
    // Thus, if a specific family is requested we set @family_requested. Then we
    // record two strings: the family name after config processing and the
    // family name after resolving. If the two are equal, it's a good match.
    //
    // So consider the case where a user has mapped Arial to Helvetica in their
    // config.
    //    requested family: "Arial"
    //    post_config_family: "Helvetica"
    //    post_match_family: "Helvetica"
    //      -> good match
    //
    // and for a missing font:
    //    requested family: "Monaco"
    //    post_config_family: "Monaco"
    //    post_match_family: "Times New Roman"
    //      -> BAD match
    //
    // However, we special-case fallback fonts; see IsFallbackFontAllowed().
    FcChar8* post_config_family;
    FcPatternGetString(pattern, FC_FAMILY, 0, &post_config_family);

    FcResult result;
    FcPattern* match = FcFontMatch(0, pattern, &result);
    if (!match) {
        FcPatternDestroy(pattern);
        return NULL;
    }

    FcChar8* post_match_family;
    FcPatternGetString(match, FC_FAMILY, 0, &post_match_family);
    const bool family_names_match =
        !family_requested ?
        true :
        strcasecmp((char *)post_config_family, (char *)post_match_family) == 0;

    FcPatternDestroy(pattern);

    if (!family_names_match && !IsFallbackFontAllowed(family_requested)) {
        FcPatternDestroy(match);
        return NULL;
    }

    return match;
}

// -----------------------------------------------------------------------------
// Check to see if the filename has already been assigned a fileid and, if so,
// use it. Otherwise, assign one. Return the resulting fileid.
// -----------------------------------------------------------------------------
static unsigned FileIdFromFilename(const char* filename)
{
    SkAutoMutexAcquire ac(global_fc_map_lock);

    std::map<std::string, unsigned>::const_iterator i =
        global_fc_map.find(filename);
    if (i == global_fc_map.end()) {
        const unsigned fileid = global_fc_map_next_id++;
        global_fc_map[filename] = fileid;
        global_fc_map_inverted[fileid] = filename;
        return fileid;
    } else {
        return i->second;
    }
}

// static
SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace,
                                       const char familyName[],
                                       const void* data, size_t bytelength,
                                       SkTypeface::Style style)
{
    const char* resolved_family_name = NULL;
    FcPattern* face_match = NULL;

    {
        SkAutoMutexAcquire ac(global_fc_map_lock);
        FcInit();
    }

    if (familyFace) {
        // Here we use the inverted global id map to find the filename from the
        // SkTypeface object. Given the filename we can ask fontconfig for the
        // familyname of the font.
        SkAutoMutexAcquire ac(global_fc_map_lock);

        const unsigned fileid = UniqueIdToFileId(familyFace->uniqueID());
        std::map<unsigned, std::string>::const_iterator i =
            global_fc_map_inverted.find(fileid);
        if (i == global_fc_map_inverted.end())
            return NULL;

        FcInit();
        face_match = FontMatch(FC_FILE, FcTypeString, i->second.c_str(),
                               NULL);

        if (!face_match)
            return NULL;
        FcChar8* family;
        if (FcPatternGetString(face_match, FC_FAMILY, 0, &family)) {
            FcPatternDestroy(face_match);
            return NULL;
        }
        // At this point, @family is pointing into the @face_match object so we
        // cannot release it yet.

        resolved_family_name = reinterpret_cast<char*>(family);
    } else if (familyName) {
        resolved_family_name = familyName;
    } else {
        return NULL;
    }

    // At this point, we have a resolved_family_name from somewhere
    SkASSERT(resolved_family_name);

    const int bold = style & SkTypeface::kBold ?
                     FC_WEIGHT_BOLD : FC_WEIGHT_NORMAL;
    const int italic = style & SkTypeface::kItalic ?
                       FC_SLANT_ITALIC : FC_SLANT_ROMAN;
    FcPattern* match = FontMatch(FC_FAMILY, FcTypeString, resolved_family_name,
                                 FC_WEIGHT, FcTypeInteger, bold,
                                 FC_SLANT, FcTypeInteger, italic,
                                 NULL);
    if (face_match)
        FcPatternDestroy(face_match);

    if (!match)
        return NULL;

    FcChar8* filename;
    if (FcPatternGetString(match, FC_FILE, 0, &filename) != FcResultMatch) {
        FcPatternDestroy(match);
        return NULL;
    }
    // Now @filename is pointing into @match

    const unsigned fileid = FileIdFromFilename(reinterpret_cast<char*>(filename));
    const unsigned id = FileIdAndStyleToUniqueId(fileid, style);
    SkTypeface* typeface = SkNEW_ARGS(FontConfigTypeface, (style, id));
    FcPatternDestroy(match);

    {
        SkAutoMutexAcquire ac(global_fc_map_lock);
        global_fc_typefaces[id] = typeface;
    }

    return typeface;
}

// static
SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream)
{
    SkASSERT(!"SkFontHost::CreateTypefaceFromStream unimplemented");
    return NULL;
}

// static
SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[])
{
    SkASSERT(!"SkFontHost::CreateTypefaceFromFile unimplemented");
    return NULL;
}

// static
bool SkFontHost::ValidFontID(SkFontID uniqueID) {
    SkAutoMutexAcquire ac(global_fc_map_lock);
    return global_fc_typefaces.find(uniqueID) != global_fc_typefaces.end();
}

// static
SkStream* SkFontHost::OpenStream(uint32_t id)
{
    SkAutoMutexAcquire ac(global_fc_map_lock);
    const unsigned fileid = UniqueIdToFileId(id);

    std::map<unsigned, std::string>::const_iterator i =
        global_fc_map_inverted.find(fileid);
    if (i == global_fc_map_inverted.end())
        return NULL;

    return SkNEW_ARGS(SkFILEStream, (i->second.c_str()));
}

size_t SkFontHost::GetFileName(SkFontID fontID, char path[], size_t length,
                               int32_t* index) {
    SkAutoMutexAcquire ac(global_fc_map_lock);
    const unsigned fileid = UniqueIdToFileId(fontID);

    std::map<unsigned, std::string>::const_iterator i =
    global_fc_map_inverted.find(fileid);
    if (i == global_fc_map_inverted.end()) {
        return 0;
    }

    const std::string& str = i->second;
    if (path) {
        memcpy(path, str.c_str(), SkMin32(str.size(), length));
    }
    if (index) {    // TODO: check if we're in a TTC
        *index = 0;
    }
    return str.size();
}

void SkFontHost::Serialize(const SkTypeface*, SkWStream*) {
    SkASSERT(!"SkFontHost::Serialize unimplemented");
}

SkTypeface* SkFontHost::Deserialize(SkStream* stream) {
    SkASSERT(!"SkFontHost::Deserialize unimplemented");
    return NULL;
}

// static
uint32_t SkFontHost::NextLogicalFont(SkFontID fontID) {
    // We don't handle font fallback, WebKit does.
    return 0;
}

///////////////////////////////////////////////////////////////////////////////

size_t SkFontHost::ShouldPurgeFontCache(size_t sizeAllocatedSoFar)
{
    if (sizeAllocatedSoFar > kFontCacheMemoryBudget)
        return sizeAllocatedSoFar - kFontCacheMemoryBudget;
    else
        return 0;   // nothing to do
}
<|endoftext|>


<commit_before>// Copyright (c) 2011-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <fs.h>
#include <qt/intro.h>
#include <qt/forms/ui_intro.h>

#include <qt/guiconstants.h>
#include <qt/guiutil.h>

#include <interfaces/node.h>
#include <util/system.h>

#include <QFileDialog>
#include <QSettings>
#include <QMessageBox>

#include <cmath>

/* Total required space (in GB) depending on user choice (prune, not prune) */
static uint64_t requiredSpace;

/* Check free space asynchronously to prevent hanging the UI thread.

   Up to one request to check a path is in flight to this thread; when the check()
   function runs, the current path is requested from the associated Intro object.
   The reply is sent back through a signal.

   This ensures that no queue of checking requests is built up while the user is
   still entering the path, and that always the most recently entered path is checked as
   soon as the thread becomes available.
*/
class FreespaceChecker : public QObject
{
    Q_OBJECT

public:
    explicit FreespaceChecker(Intro *intro);

    enum Status {
        ST_OK,
        ST_ERROR
    };

public Q_SLOTS:
    void check();

Q_SIGNALS:
    void reply(int status, const QString &message, quint64 available);

private:
    Intro *intro;
};

#include <qt/intro.moc>

FreespaceChecker::FreespaceChecker(Intro *_intro)
{
    this->intro = _intro;
}

void FreespaceChecker::check()
{
    QString dataDirStr = intro->getPathToCheck();
    fs::path dataDir = GUIUtil::qstringToBoostPath(dataDirStr);
    uint64_t freeBytesAvailable = 0;
    int replyStatus = ST_OK;
    QString replyMessage = tr("A new data directory will be created.");

    /* Find first parent that exists, so that fs::space does not fail */
    fs::path parentDir = dataDir;
    fs::path parentDirOld = fs::path();
    while(parentDir.has_parent_path() && !fs::exists(parentDir))
    {
        parentDir = parentDir.parent_path();

        /* Check if we make any progress, break if not to prevent an infinite loop here */
        if (parentDirOld == parentDir)
            break;

        parentDirOld = parentDir;
    }

    try {
        freeBytesAvailable = fs::space(parentDir).available;
        if(fs::exists(dataDir))
        {
            if(fs::is_directory(dataDir))
            {
                QString separator = "" + QDir::toNativeSeparators("/") + tr("name") + "";
                replyStatus = ST_OK;
                replyMessage = tr("Directory already exists. Add %1 if you intend to create a new directory here.").arg(separator);
            } else {
                replyStatus = ST_ERROR;
                replyMessage = tr("Path already exists, and is not a directory.");
            }
        }
    } catch (const fs::filesystem_error&)
    {
        /* Parent directory does not exist or is not accessible */
        replyStatus = ST_ERROR;
        replyMessage = tr("Cannot create data directory here.");
    }
    Q_EMIT reply(replyStatus, replyMessage, freeBytesAvailable);
}

Intro::Intro(QWidget *parent, uint64_t blockchain_size, uint64_t chain_state_size) :
    QDialog(parent),
    ui(new Ui::Intro),
    thread(nullptr),
    signalled(false),
    m_blockchain_size(blockchain_size),
    m_chain_state_size(chain_state_size)
{
    ui->setupUi(this);
    ui->welcomeLabel->setText(ui->welcomeLabel->text().arg(tr(PACKAGE_NAME)));
    ui->storageLabel->setText(ui->storageLabel->text().arg(tr(PACKAGE_NAME)));

    ui->lblExplanation1->setText(ui->lblExplanation1->text()
        .arg(tr(PACKAGE_NAME))
        .arg(m_blockchain_size)
        .arg(2017)
        .arg(tr("Qtum"))
    );
    ui->lblExplanation2->setText(ui->lblExplanation2->text().arg(tr(PACKAGE_NAME)));

    uint64_t pruneTarget = std::max<int64_t>(0, gArgs.GetArg("-prune", 0));
    requiredSpace = m_blockchain_size;
    QString storageRequiresMsg = tr("At least %1 GB of data will be stored in this directory, and it will grow over time.");
    if (pruneTarget) {
        uint64_t prunedGBs = std::ceil(pruneTarget * 1024 * 1024.0 / GB_BYTES);
        if (prunedGBs <= requiredSpace) {
            requiredSpace = prunedGBs;
            storageRequiresMsg = tr("Approximately %1 GB of data will be stored in this directory.");
        }
        ui->lblExplanation3->setVisible(true);
    } else {
        ui->lblExplanation3->setVisible(false);
    }
    requiredSpace += m_chain_state_size;
    ui->sizeWarningLabel->setText(
        tr("%1 will download and store a copy of the Qtum block chain.").arg(tr(PACKAGE_NAME)) + " " +
        storageRequiresMsg.arg(requiredSpace) + " " +
        tr("The wallet will also be stored in this directory.")
    );
    startThread();
}

Intro::~Intro()
{
    delete ui;
    /* Ensure thread is finished before it is deleted */
    thread->quit();
    thread->wait();
}

QString Intro::getDataDirectory()
{
    return ui->dataDirectory->text();
}

void Intro::setDataDirectory(const QString &dataDir)
{
    ui->dataDirectory->setText(dataDir);
    if(dataDir == getDefaultDataDirectory())
    {
        ui->dataDirDefault->setChecked(true);
        ui->dataDirectory->setEnabled(false);
        ui->ellipsisButton->setEnabled(false);
    } else {
        ui->dataDirCustom->setChecked(true);
        ui->dataDirectory->setEnabled(true);
        ui->ellipsisButton->setEnabled(true);
    }
}

QString Intro::getDefaultDataDirectory()
{
    return GUIUtil::boostPathToQString(GetDefaultDataDir());
}

bool Intro::pickDataDirectory(interfaces::Node& node)
{
    QSettings settings;
    /* If data directory provided on command line, no need to look at settings
       or show a picking dialog */
    if(!gArgs.GetArg("-datadir", "").empty())
        return true;
    /* 1) Default data directory for operating system */
    QString dataDir = getDefaultDataDirectory();
    /* 2) Allow QSettings to override default dir */
    dataDir = settings.value("strDataDir", dataDir).toString();

    if(!fs::exists(GUIUtil::qstringToBoostPath(dataDir)) || gArgs.GetBoolArg("-choosedatadir", DEFAULT_CHOOSE_DATADIR) || settings.value("fReset", false).toBool() || gArgs.GetBoolArg("-resetguisettings", false))
    {
        /* Use selectParams here to guarantee Params() can be used by node interface */
        try {
            node.selectParams(gArgs.GetChainName());
        } catch (const std::exception&) {
            return false;
        }

        /* If current default data directory does not exist, let the user choose one */
        Intro intro(0, node.getAssumedBlockchainSize(), node.getAssumedChainStateSize());
        intro.setDataDirectory(dataDir);
        intro.setWindowIcon(QIcon(":icons/bitcoin"));

        while(true)
        {
            if(!intro.exec())
            {
                /* Cancel clicked */
                return false;
            }
            dataDir = intro.getDataDirectory();
            try {
                if (TryCreateDirectories(GUIUtil::qstringToBoostPath(dataDir))) {
                    // If a new data directory has been created, make wallets subdirectory too
                    TryCreateDirectories(GUIUtil::qstringToBoostPath(dataDir) / "wallets");
                }
                break;
            } catch (const fs::filesystem_error&) {
                QMessageBox::critical(nullptr, tr(PACKAGE_NAME),
                    tr("Error: Specified data directory \"%1\" cannot be created.").arg(dataDir));
                /* fall through, back to choosing screen */
            }
        }

        settings.setValue("strDataDir", dataDir);
        settings.setValue("fReset", false);
    }
    /* Only override -datadir if different from the default, to make it possible to
     * override -datadir in the bitcoin.conf file in the default data directory
     * (to be consistent with bitcoind behavior)
     */
    if(dataDir != getDefaultDataDirectory()) {
        node.softSetArg("-datadir", GUIUtil::qstringToBoostPath(dataDir).string()); // use OS locale for path setting
    }
    return true;
}

void Intro::setStatus(int status, const QString &message, quint64 bytesAvailable)
{
    switch(status)
    {
    case FreespaceChecker::ST_OK:
        ui->errorMessage->setText(message);
        ui->errorMessage->setStyleSheet("");
        break;
    case FreespaceChecker::ST_ERROR:
        ui->errorMessage->setText(tr("Error") + ": " + message);
        ui->errorMessage->setStyleSheet("QLabel { color: #800000 }");
        break;
    }
    /* Indicate number of bytes available */
    if(status == FreespaceChecker::ST_ERROR)
    {
        ui->freeSpace->setText("");
    } else {
        QString freeString = tr("%n GB of free space available", "", bytesAvailable/GB_BYTES);
        if(bytesAvailable < requiredSpace * GB_BYTES)
        {
            freeString += " " + tr("(of %n GB needed)", "", requiredSpace);
            ui->freeSpace->setStyleSheet("QLabel { color: #800000 }");
        } else {
            ui->freeSpace->setStyleSheet("");
        }
        ui->freeSpace->setText(freeString + ".");
    }
    /* Don't allow confirm in ERROR state */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(status != FreespaceChecker::ST_ERROR);
}

void Intro::on_dataDirectory_textChanged(const QString &dataDirStr)
{
    /* Disable OK button until check result comes in */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(false);
    checkPath(dataDirStr);
}

void Intro::on_ellipsisButton_clicked()
{
    QString dir = QDir::toNativeSeparators(QFileDialog::getExistingDirectory(nullptr, "Choose data directory", ui->dataDirectory->text()));
    if(!dir.isEmpty())
        ui->dataDirectory->setText(dir);
}

void Intro::on_dataDirDefault_clicked()
{
    setDataDirectory(getDefaultDataDirectory());
}

void Intro::on_dataDirCustom_clicked()
{
    ui->dataDirectory->setEnabled(true);
    ui->ellipsisButton->setEnabled(true);
    setDataDirectory(QDir::homePath());
}

void Intro::startThread()
{
    thread = new QThread(this);
    FreespaceChecker *executor = new FreespaceChecker(this);
    executor->moveToThread(thread);

    connect(executor, &FreespaceChecker::reply, this, &Intro::setStatus);
    connect(this, &Intro::requestCheck, executor, &FreespaceChecker::check);
    /*  make sure executor object is deleted in its own thread */
    connect(thread, &QThread::finished, executor, &QObject::deleteLater);

    thread->start();
}

void Intro::checkPath(const QString &dataDir)
{
    mutex.lock();
    pathToCheck = dataDir;
    if(!signalled)
    {
        signalled = true;
        Q_EMIT requestCheck();
    }
    mutex.unlock();
}

QString Intro::getPathToCheck()
{
    QString retval;
    mutex.lock();
    retval = pathToCheck;
    signalled = false; /* new request can be queued now */
    mutex.unlock();
    return retval;
}
<commit_msg>Set custom datadir to home for OSX only<commit_after>// Copyright (c) 2011-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <fs.h>
#include <qt/intro.h>
#include <qt/forms/ui_intro.h>

#include <qt/guiconstants.h>
#include <qt/guiutil.h>

#include <interfaces/node.h>
#include <util/system.h>

#include <QFileDialog>
#include <QSettings>
#include <QMessageBox>

#include <cmath>

/* Total required space (in GB) depending on user choice (prune, not prune) */
static uint64_t requiredSpace;

/* Check free space asynchronously to prevent hanging the UI thread.

   Up to one request to check a path is in flight to this thread; when the check()
   function runs, the current path is requested from the associated Intro object.
   The reply is sent back through a signal.

   This ensures that no queue of checking requests is built up while the user is
   still entering the path, and that always the most recently entered path is checked as
   soon as the thread becomes available.
*/
class FreespaceChecker : public QObject
{
    Q_OBJECT

public:
    explicit FreespaceChecker(Intro *intro);

    enum Status {
        ST_OK,
        ST_ERROR
    };

public Q_SLOTS:
    void check();

Q_SIGNALS:
    void reply(int status, const QString &message, quint64 available);

private:
    Intro *intro;
};

#include <qt/intro.moc>

FreespaceChecker::FreespaceChecker(Intro *_intro)
{
    this->intro = _intro;
}

void FreespaceChecker::check()
{
    QString dataDirStr = intro->getPathToCheck();
    fs::path dataDir = GUIUtil::qstringToBoostPath(dataDirStr);
    uint64_t freeBytesAvailable = 0;
    int replyStatus = ST_OK;
    QString replyMessage = tr("A new data directory will be created.");

    /* Find first parent that exists, so that fs::space does not fail */
    fs::path parentDir = dataDir;
    fs::path parentDirOld = fs::path();
    while(parentDir.has_parent_path() && !fs::exists(parentDir))
    {
        parentDir = parentDir.parent_path();

        /* Check if we make any progress, break if not to prevent an infinite loop here */
        if (parentDirOld == parentDir)
            break;

        parentDirOld = parentDir;
    }

    try {
        freeBytesAvailable = fs::space(parentDir).available;
        if(fs::exists(dataDir))
        {
            if(fs::is_directory(dataDir))
            {
                QString separator = "" + QDir::toNativeSeparators("/") + tr("name") + "";
                replyStatus = ST_OK;
                replyMessage = tr("Directory already exists. Add %1 if you intend to create a new directory here.").arg(separator);
            } else {
                replyStatus = ST_ERROR;
                replyMessage = tr("Path already exists, and is not a directory.");
            }
        }
    } catch (const fs::filesystem_error&)
    {
        /* Parent directory does not exist or is not accessible */
        replyStatus = ST_ERROR;
        replyMessage = tr("Cannot create data directory here.");
    }
    Q_EMIT reply(replyStatus, replyMessage, freeBytesAvailable);
}

Intro::Intro(QWidget *parent, uint64_t blockchain_size, uint64_t chain_state_size) :
    QDialog(parent),
    ui(new Ui::Intro),
    thread(nullptr),
    signalled(false),
    m_blockchain_size(blockchain_size),
    m_chain_state_size(chain_state_size)
{
    ui->setupUi(this);
    ui->welcomeLabel->setText(ui->welcomeLabel->text().arg(tr(PACKAGE_NAME)));
    ui->storageLabel->setText(ui->storageLabel->text().arg(tr(PACKAGE_NAME)));

    ui->lblExplanation1->setText(ui->lblExplanation1->text()
        .arg(tr(PACKAGE_NAME))
        .arg(m_blockchain_size)
        .arg(2017)
        .arg(tr("Qtum"))
    );
    ui->lblExplanation2->setText(ui->lblExplanation2->text().arg(tr(PACKAGE_NAME)));

    uint64_t pruneTarget = std::max<int64_t>(0, gArgs.GetArg("-prune", 0));
    requiredSpace = m_blockchain_size;
    QString storageRequiresMsg = tr("At least %1 GB of data will be stored in this directory, and it will grow over time.");
    if (pruneTarget) {
        uint64_t prunedGBs = std::ceil(pruneTarget * 1024 * 1024.0 / GB_BYTES);
        if (prunedGBs <= requiredSpace) {
            requiredSpace = prunedGBs;
            storageRequiresMsg = tr("Approximately %1 GB of data will be stored in this directory.");
        }
        ui->lblExplanation3->setVisible(true);
    } else {
        ui->lblExplanation3->setVisible(false);
    }
    requiredSpace += m_chain_state_size;
    ui->sizeWarningLabel->setText(
        tr("%1 will download and store a copy of the Qtum block chain.").arg(tr(PACKAGE_NAME)) + " " +
        storageRequiresMsg.arg(requiredSpace) + " " +
        tr("The wallet will also be stored in this directory.")
    );
    startThread();
}

Intro::~Intro()
{
    delete ui;
    /* Ensure thread is finished before it is deleted */
    thread->quit();
    thread->wait();
}

QString Intro::getDataDirectory()
{
    return ui->dataDirectory->text();
}

void Intro::setDataDirectory(const QString &dataDir)
{
    ui->dataDirectory->setText(dataDir);
    if(dataDir == getDefaultDataDirectory())
    {
        ui->dataDirDefault->setChecked(true);
        ui->dataDirectory->setEnabled(false);
        ui->ellipsisButton->setEnabled(false);
    } else {
        ui->dataDirCustom->setChecked(true);
        ui->dataDirectory->setEnabled(true);
        ui->ellipsisButton->setEnabled(true);
    }
}

QString Intro::getDefaultDataDirectory()
{
    return GUIUtil::boostPathToQString(GetDefaultDataDir());
}

bool Intro::pickDataDirectory(interfaces::Node& node)
{
    QSettings settings;
    /* If data directory provided on command line, no need to look at settings
       or show a picking dialog */
    if(!gArgs.GetArg("-datadir", "").empty())
        return true;
    /* 1) Default data directory for operating system */
    QString dataDir = getDefaultDataDirectory();
    /* 2) Allow QSettings to override default dir */
    dataDir = settings.value("strDataDir", dataDir).toString();

    if(!fs::exists(GUIUtil::qstringToBoostPath(dataDir)) || gArgs.GetBoolArg("-choosedatadir", DEFAULT_CHOOSE_DATADIR) || settings.value("fReset", false).toBool() || gArgs.GetBoolArg("-resetguisettings", false))
    {
        /* Use selectParams here to guarantee Params() can be used by node interface */
        try {
            node.selectParams(gArgs.GetChainName());
        } catch (const std::exception&) {
            return false;
        }

        /* If current default data directory does not exist, let the user choose one */
        Intro intro(0, node.getAssumedBlockchainSize(), node.getAssumedChainStateSize());
        intro.setDataDirectory(dataDir);
        intro.setWindowIcon(QIcon(":icons/bitcoin"));

        while(true)
        {
            if(!intro.exec())
            {
                /* Cancel clicked */
                return false;
            }
            dataDir = intro.getDataDirectory();
            try {
                if (TryCreateDirectories(GUIUtil::qstringToBoostPath(dataDir))) {
                    // If a new data directory has been created, make wallets subdirectory too
                    TryCreateDirectories(GUIUtil::qstringToBoostPath(dataDir) / "wallets");
                }
                break;
            } catch (const fs::filesystem_error&) {
                QMessageBox::critical(nullptr, tr(PACKAGE_NAME),
                    tr("Error: Specified data directory \"%1\" cannot be created.").arg(dataDir));
                /* fall through, back to choosing screen */
            }
        }

        settings.setValue("strDataDir", dataDir);
        settings.setValue("fReset", false);
    }
    /* Only override -datadir if different from the default, to make it possible to
     * override -datadir in the bitcoin.conf file in the default data directory
     * (to be consistent with bitcoind behavior)
     */
    if(dataDir != getDefaultDataDirectory()) {
        node.softSetArg("-datadir", GUIUtil::qstringToBoostPath(dataDir).string()); // use OS locale for path setting
    }
    return true;
}

void Intro::setStatus(int status, const QString &message, quint64 bytesAvailable)
{
    switch(status)
    {
    case FreespaceChecker::ST_OK:
        ui->errorMessage->setText(message);
        ui->errorMessage->setStyleSheet("");
        break;
    case FreespaceChecker::ST_ERROR:
        ui->errorMessage->setText(tr("Error") + ": " + message);
        ui->errorMessage->setStyleSheet("QLabel { color: #800000 }");
        break;
    }
    /* Indicate number of bytes available */
    if(status == FreespaceChecker::ST_ERROR)
    {
        ui->freeSpace->setText("");
    } else {
        QString freeString = tr("%n GB of free space available", "", bytesAvailable/GB_BYTES);
        if(bytesAvailable < requiredSpace * GB_BYTES)
        {
            freeString += " " + tr("(of %n GB needed)", "", requiredSpace);
            ui->freeSpace->setStyleSheet("QLabel { color: #800000 }");
        } else {
            ui->freeSpace->setStyleSheet("");
        }
        ui->freeSpace->setText(freeString + ".");
    }
    /* Don't allow confirm in ERROR state */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(status != FreespaceChecker::ST_ERROR);
}

void Intro::on_dataDirectory_textChanged(const QString &dataDirStr)
{
    /* Disable OK button until check result comes in */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(false);
    checkPath(dataDirStr);
}

void Intro::on_ellipsisButton_clicked()
{
    QString dir = QDir::toNativeSeparators(QFileDialog::getExistingDirectory(nullptr, "Choose data directory", ui->dataDirectory->text()));
    if(!dir.isEmpty())
        ui->dataDirectory->setText(dir);
}

void Intro::on_dataDirDefault_clicked()
{
    setDataDirectory(getDefaultDataDirectory());
}

void Intro::on_dataDirCustom_clicked()
{
    ui->dataDirectory->setEnabled(true);
    ui->ellipsisButton->setEnabled(true);
	#ifdef MAC_OSX
	setDataDirectory(QDir::homePath()+"/Qtum");
	#endif
}

void Intro::startThread()
{
    thread = new QThread(this);
    FreespaceChecker *executor = new FreespaceChecker(this);
    executor->moveToThread(thread);

    connect(executor, &FreespaceChecker::reply, this, &Intro::setStatus);
    connect(this, &Intro::requestCheck, executor, &FreespaceChecker::check);
    /*  make sure executor object is deleted in its own thread */
    connect(thread, &QThread::finished, executor, &QObject::deleteLater);

    thread->start();
}

void Intro::checkPath(const QString &dataDir)
{
    mutex.lock();
    pathToCheck = dataDir;
    if(!signalled)
    {
        signalled = true;
        Q_EMIT requestCheck();
    }
    mutex.unlock();
}

QString Intro::getPathToCheck()
{
    QString retval;
    mutex.lock();
    retval = pathToCheck;
    signalled = false; /* new request can be queued now */
    mutex.unlock();
    return retval;
}
<|endoftext|>


<commit_before>// Copyright (c) 2011-2014 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "intro.h"
#include "ui_intro.h"

#include "guiutil.h"

#include "util.h"

#include <boost/filesystem.hpp>

#include <QFileDialog>
#include <QSettings>
#include <QMessageBox>

/* Minimum free space (in bytes) needed for data directory */
static const uint64_t GB_BYTES = 1000000000LL;
static const uint64_t BLOCK_CHAIN_SIZE = 20LL * GB_BYTES;

/* Check free space asynchronously to prevent hanging the UI thread.

   Up to one request to check a path is in flight to this thread; when the check()
   function runs, the current path is requested from the associated Intro object.
   The reply is sent back through a signal.

   This ensures that no queue of checking requests is built up while the user is
   still entering the path, and that always the most recently entered path is checked as
   soon as the thread becomes available.
*/
class FreespaceChecker : public QObject
{
    Q_OBJECT

public:
    FreespaceChecker(Intro *intro);

    enum Status {
        ST_OK,
        ST_ERROR
    };

public slots:
    void check();

signals:
    void reply(int status, const QString &message, quint64 available);

private:
    Intro *intro;
};

#include "intro.moc"

FreespaceChecker::FreespaceChecker(Intro *intro)
{
    this->intro = intro;
}

void FreespaceChecker::check()
{
    namespace fs = boost::filesystem;
    QString dataDirStr = intro->getPathToCheck();
    fs::path dataDir = GUIUtil::qstringToBoostPath(dataDirStr);
    uint64_t freeBytesAvailable = 0;
    int replyStatus = ST_OK;
    QString replyMessage = tr("A new data directory will be created.");

    /* Find first parent that exists, so that fs::space does not fail */
    fs::path parentDir = dataDir;
    fs::path parentDirOld = fs::path();
    while(parentDir.has_parent_path() && !fs::exists(parentDir))
    {
        parentDir = parentDir.parent_path();

        /* Check if we make any progress, break if not to prevent an infinite loop here */
        if (parentDirOld == parentDir)
            break;

        parentDirOld = parentDir;
    }

    try {
        freeBytesAvailable = fs::space(parentDir).available;
        if(fs::exists(dataDir))
        {
            if(fs::is_directory(dataDir))
            {
                QString separator = "" + QDir::toNativeSeparators("/") + tr("name") + "";
                replyStatus = ST_OK;
                replyMessage = tr("Directory already exists. Add %1 if you intend to create a new directory here.").arg(separator);
            } else {
                replyStatus = ST_ERROR;
                replyMessage = tr("Path already exists, and is not a directory.");
            }
        }
    } catch(fs::filesystem_error &e)
    {
        /* Parent directory does not exist or is not accessible */
        replyStatus = ST_ERROR;
        replyMessage = tr("Cannot create data directory here.");
    }
    emit reply(replyStatus, replyMessage, freeBytesAvailable);
}

Intro::Intro(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Intro),
    thread(0),
    signalled(false)
{
    ui->setupUi(this);
    ui->sizeWarningLabel->setText(ui->sizeWarningLabel->text().arg(BLOCK_CHAIN_SIZE/GB_BYTES));
    startThread();
}

Intro::~Intro()
{
    delete ui;
    /* Ensure thread is finished before it is deleted */
    emit stopThread();
    thread->wait();
}

QString Intro::getDataDirectory()
{
    return ui->dataDirectory->text();
}

void Intro::setDataDirectory(const QString &dataDir)
{
    ui->dataDirectory->setText(dataDir);
    if(dataDir == getDefaultDataDirectory())
    {
        ui->dataDirDefault->setChecked(true);
        ui->dataDirectory->setEnabled(false);
        ui->ellipsisButton->setEnabled(false);
    } else {
        ui->dataDirCustom->setChecked(true);
        ui->dataDirectory->setEnabled(true);
        ui->ellipsisButton->setEnabled(true);
    }
}

QString Intro::getDefaultDataDirectory()
{
    return GUIUtil::boostPathToQString(GetDefaultDataDir());
}

void Intro::pickDataDirectory()
{
    namespace fs = boost::filesystem;
    QSettings settings;
    /* If data directory provided on command line, no need to look at settings
       or show a picking dialog */
    if(!GetArg("-datadir", "").empty())
        return;
    /* 1) Default data directory for operating system */
    QString dataDir = getDefaultDataDirectory();
    /* 2) Allow QSettings to override default dir */
    dataDir = settings.value("strDataDir", dataDir).toString();

    if(!fs::exists(GUIUtil::qstringToBoostPath(dataDir)) || GetBoolArg("-choosedatadir", false))
    {
        /* If current default data directory does not exist, let the user choose one */
        Intro intro;
        intro.setDataDirectory(dataDir);
        intro.setWindowIcon(QIcon(":icons/bitcoin"));

        while(true)
        {
            if(!intro.exec())
            {
                /* Cancel clicked */
                exit(0);
            }
            dataDir = intro.getDataDirectory();
            try {
                TryCreateDirectory(GUIUtil::qstringToBoostPath(dataDir));
                break;
            } catch(fs::filesystem_error &e) {
                QMessageBox::critical(0, tr("Fastcoin Core"),
                    tr("Error: Specified data directory \"%1\" cannot be created.").arg(dataDir));
                /* fall through, back to choosing screen */
            }
        }

        settings.setValue("strDataDir", dataDir);
    }
    /* Only override -datadir if different from the default, to make it possible to
     * override -datadir in the bitcoin.conf file in the default data directory
     * (to be consistent with bitcoind behavior)
     */
    if(dataDir != getDefaultDataDirectory())
        SoftSetArg("-datadir", GUIUtil::qstringToBoostPath(dataDir).string()); // use OS locale for path setting
}

void Intro::setStatus(int status, const QString &message, quint64 bytesAvailable)
{
    switch(status)
    {
    case FreespaceChecker::ST_OK:
        ui->errorMessage->setText(message);
        ui->errorMessage->setStyleSheet("");
        break;
    case FreespaceChecker::ST_ERROR:
        ui->errorMessage->setText(tr("Error") + ": " + message);
        ui->errorMessage->setStyleSheet("QLabel { color: #800000 }");
        break;
    }
    /* Indicate number of bytes available */
    if(status == FreespaceChecker::ST_ERROR)
    {
        ui->freeSpace->setText("");
    } else {
        QString freeString = tr("%n GB of free space available", "", bytesAvailable/GB_BYTES);
        if(bytesAvailable < BLOCK_CHAIN_SIZE)
        {
            freeString += " " + tr("(of %n GB needed)", "", BLOCK_CHAIN_SIZE/GB_BYTES);
            ui->freeSpace->setStyleSheet("QLabel { color: #800000 }");
        } else {
            ui->freeSpace->setStyleSheet("");
        }
        ui->freeSpace->setText(freeString + ".");
    }
    /* Don't allow confirm in ERROR state */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(status != FreespaceChecker::ST_ERROR);
}

void Intro::on_dataDirectory_textChanged(const QString &dataDirStr)
{
    /* Disable OK button until check result comes in */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(false);
    checkPath(dataDirStr);
}

void Intro::on_ellipsisButton_clicked()
{
    QString dir = QDir::toNativeSeparators(QFileDialog::getExistingDirectory(0, "Choose data directory", ui->dataDirectory->text()));
    if(!dir.isEmpty())
        ui->dataDirectory->setText(dir);
}

void Intro::on_dataDirDefault_clicked()
{
    setDataDirectory(getDefaultDataDirectory());
}

void Intro::on_dataDirCustom_clicked()
{
    ui->dataDirectory->setEnabled(true);
    ui->ellipsisButton->setEnabled(true);
}

void Intro::startThread()
{
    thread = new QThread(this);
    FreespaceChecker *executor = new FreespaceChecker(this);
    executor->moveToThread(thread);

    connect(executor, SIGNAL(reply(int,QString,quint64)), this, SLOT(setStatus(int,QString,quint64)));
    connect(this, SIGNAL(requestCheck()), executor, SLOT(check()));
    /*  make sure executor object is deleted in its own thread */
    connect(this, SIGNAL(stopThread()), executor, SLOT(deleteLater()));
    connect(this, SIGNAL(stopThread()), thread, SLOT(quit()));

    thread->start();
}

void Intro::checkPath(const QString &dataDir)
{
    mutex.lock();
    pathToCheck = dataDir;
    if(!signalled)
    {
        signalled = true;
        emit requestCheck();
    }
    mutex.unlock();
}

QString Intro::getPathToCheck()
{
    QString retval;
    mutex.lock();
    retval = pathToCheck;
    signalled = false; /* new request can be queued now */
    mutex.unlock();
    return retval;
}

<commit_msg>Update intro.cpp<commit_after>// Copyright (c) 2011-2014 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "intro.h"
#include "ui_intro.h"

#include "guiutil.h"

#include "util.h"

#include <boost/filesystem.hpp>

#include <QFileDialog>
#include <QSettings>
#include <QMessageBox>

/* Minimum free space (in bytes) needed for data directory */
static const uint64_t GB_BYTES = 1000000000LL;
static const uint64_t BLOCK_CHAIN_SIZE = 20LL * GB_BYTES;

/* Check free space asynchronously to prevent hanging the UI thread.

   Up to one request to check a path is in flight to this thread; when the check()
   function runs, the current path is requested from the associated Intro object.
   The reply is sent back through a signal.

   This ensures that no queue of checking requests is built up while the user is
   still entering the path, and that always the most recently entered path is checked as
   soon as the thread becomes available.
*/
class FreespaceChecker : public QObject
{
    Q_OBJECT

public:
    FreespaceChecker(Intro *intro);

    enum Status {
        ST_OK,
        ST_ERROR
    };

public slots:
    void check();

signals:
    void reply(int status, const QString &message, quint64 available);

private:
    Intro *intro;
};

#include "intro.moc"

FreespaceChecker::FreespaceChecker(Intro *intro)
{
    this->intro = intro;
}

void FreespaceChecker::check()
{
    namespace fs = boost::filesystem;
    QString dataDirStr = intro->getPathToCheck();
    fs::path dataDir = GUIUtil::qstringToBoostPath(dataDirStr);
    uint64_t freeBytesAvailable = 0;
    int replyStatus = ST_OK;
    QString replyMessage = tr("A new data directory will be created.");

    /* Find first parent that exists, so that fs::space does not fail */
    fs::path parentDir = dataDir;
    fs::path parentDirOld = fs::path();
    while(parentDir.has_parent_path() && !fs::exists(parentDir))
    {
        parentDir = parentDir.parent_path();

        /* Check if we make any progress, break if not to prevent an infinite loop here */
        if (parentDirOld == parentDir)
            break;

        parentDirOld = parentDir;
    }

    try {
        freeBytesAvailable = fs::space(parentDir).available;
        if(fs::exists(dataDir))
        {
            if(fs::is_directory(dataDir))
            {
                QString separator = "" + QDir::toNativeSeparators("/") + tr("name") + "";
                replyStatus = ST_OK;
                replyMessage = tr("Directory already exists. Add %1 if you intend to create a new directory here.").arg(separator);
            } else {
                replyStatus = ST_ERROR;
                replyMessage = tr("Path already exists, and is not a directory.");
            }
        }
    } catch(fs::filesystem_error &e)
    {
        /* Parent directory does not exist or is not accessible */
        replyStatus = ST_ERROR;
        replyMessage = tr("Cannot create data directory here.");
    }
    emit reply(replyStatus, replyMessage, freeBytesAvailable);
}

Intro::Intro(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Intro),
    thread(0),
    signalled(false)
{
    ui->setupUi(this);
    ui->sizeWarningLabel->setText(ui->sizeWarningLabel->text().arg(BLOCK_CHAIN_SIZE/GB_BYTES));
    startThread();
}

Intro::~Intro()
{
    delete ui;
    /* Ensure thread is finished before it is deleted */
    emit stopThread();
    thread->wait();
}

QString Intro::getDataDirectory()
{
    return ui->dataDirectory->text();
}

void Intro::setDataDirectory(const QString &dataDir)
{
    ui->dataDirectory->setText(dataDir);
    if(dataDir == getDefaultDataDirectory())
    {
        ui->dataDirDefault->setChecked(true);
        ui->dataDirectory->setEnabled(false);
        ui->ellipsisButton->setEnabled(false);
    } else {
        ui->dataDirCustom->setChecked(true);
        ui->dataDirectory->setEnabled(true);
        ui->ellipsisButton->setEnabled(true);
    }
}

QString Intro::getDefaultDataDirectory()
{
    return GUIUtil::boostPathToQString(GetDefaultDataDir());
}

void Intro::pickDataDirectory()
{
    namespace fs = boost::filesystem;
    QSettings settings;
    /* If data directory provided on command line, no need to look at settings
       or show a picking dialog */
    if(!GetArg("-datadir", "").empty())
        return;
    /* 1) Default data directory for operating system */
    QString dataDir = getDefaultDataDirectory();
    /* 2) Allow QSettings to override default dir */
    dataDir = settings.value("strDataDir", dataDir).toString();

    if(!fs::exists(GUIUtil::qstringToBoostPath(dataDir)) || GetBoolArg("-choosedatadir", false))
    {
        /* If current default data directory does not exist, let the user choose one */
        Intro intro;
        intro.setDataDirectory(dataDir);
        intro.setWindowIcon(QIcon(":icons/bitcoin"));

        while(true)
        {
            if(!intro.exec())
            {
                /* Cancel clicked */
                exit(0);
            }
            dataDir = intro.getDataDirectory();
            try {
                TryCreateDirectory(GUIUtil::qstringToBoostPath(dataDir));
                break;
            } catch(fs::filesystem_error &e) {
                QMessageBox::critical(0, tr("Fastcoin Core"),
                    tr("Error: Specified data directory \"%1\" cannot be created.").arg(dataDir));
                /* fall through, back to choosing screen */
            }
        }

        settings.setValue("strDataDir", dataDir);
    }
    /* Only override -datadir if different from the default, to make it possible to
     * override -datadir in the bitcoin.conf file in the default data directory
     * (to be consistent with bitcoind behavior)
     */
    if(dataDir != getDefaultDataDirectory())
        SoftSetArg("-datadir", GUIUtil::qstringToBoostPath(dataDir).string()); // use OS locale for path setting
}

void Intro::setStatus(int status, const QString &message, quint64 bytesAvailable)
{
    switch(status)
    {
    case FreespaceChecker::ST_OK:
        ui->errorMessage->setText(message);
        ui->errorMessage->setStyleSheet("");
        break;
    case FreespaceChecker::ST_ERROR:
        ui->errorMessage->setText(tr("Error") + ": " + message);
        ui->errorMessage->setStyleSheet("QLabel { color: #800000 }");
        break;
    }
    /* Indicate number of bytes available */
    if(status == FreespaceChecker::ST_ERROR)
    {
        ui->freeSpace->setText("");
    } else {
        QString freeString = tr("%n GB of free space available", "", bytesAvailable/GB_BYTES);
        if(bytesAvailable < BLOCK_CHAIN_SIZE)
        {
            freeString += " " + tr("(of %n GB needed)", "", BLOCK_CHAIN_SIZE/GB_BYTES);
            ui->freeSpace->setStyleSheet("QLabel { color: #800000 }");
        } else {
            ui->freeSpace->setStyleSheet("");
        }
        ui->freeSpace->setText(freeString + ".");
    }
    /* Don't allow confirm in ERROR state */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(status != FreespaceChecker::ST_ERROR);
}

void Intro::on_dataDirectory_textChanged(const QString &dataDirStr)
{
    /* Disable OK button until check result comes in */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(false);
    checkPath(dataDirStr);
}

void Intro::on_ellipsisButton_clicked()
{
    QString dir = QDir::toNativeSeparators(QFileDialog::getExistingDirectory(0, "Choose data directory", ui->dataDirectory->text()));
    if(!dir.isEmpty())
        ui->dataDirectory->setText(dir);
}

void Intro::on_dataDirDefault_clicked()
{
    setDataDirectory(getDefaultDataDirectory());
}

void Intro::on_dataDirCustom_clicked()
{
    ui->dataDirectory->setEnabled(true);
    ui->ellipsisButton->setEnabled(true);
}

void Intro::startThread()
{
    thread = new QThread(this);
    FreespaceChecker *executor = new FreespaceChecker(this);
    executor->moveToThread(thread);

    connect(executor, SIGNAL(reply(int,QString,quint64)), this, SLOT(setStatus(int,QString,quint64)));
    connect(this, SIGNAL(requestCheck()), executor, SLOT(check()));
    /*  make sure executor object is deleted in its own thread */
    connect(this, SIGNAL(stopThread()), executor, SLOT(deleteLater()));
    connect(this, SIGNAL(stopThread()), thread, SLOT(quit()));

    thread->start();
}

void Intro::checkPath(const QString &dataDir)
{
    mutex.lock();
    pathToCheck = dataDir;
    if(!signalled)
    {
        signalled = true;
        emit requestCheck();
    }
    mutex.unlock();
}

QString Intro::getPathToCheck()
{
    QString retval;
    mutex.lock();
    retval = pathToCheck;
    signalled = false; /* new request can be queued now */
    mutex.unlock();
    return retval;
}

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