// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/themes/theme_properties.h"

#include "base/memory/scoped_ptr.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "chrome/browser/themes/browser_theme_pack.h"
#include "grit/theme_resources.h"
#include "grit/ui_resources.h"

namespace {

// ----------------------------------------------------------------------------
// Defaults for properties which are stored in the browser theme pack. If you
// change these defaults, you must increment the version number in
// browser_theme_pack.h

// Default colors.
#if defined(OS_CHROMEOS)
// Used for theme fallback colors.
const SkColor kDefaultColorFrame = SkColorSetRGB(109, 109, 109);
const SkColor kDefaultColorFrameInactive = SkColorSetRGB(176, 176, 176);
#else
const SkColor kDefaultColorFrame = SkColorSetRGB(66, 116, 201);
const SkColor kDefaultColorFrameInactive = SkColorSetRGB(161, 182, 228);
#endif  // OS_CHROMEOS
const SkColor kDefaultColorFrameIncognito = SkColorSetRGB(83, 106, 139);
const SkColor kDefaultColorFrameIncognitoInactive =
    SkColorSetRGB(126, 139, 156);
#if defined(OS_MACOSX)
const SkColor kDefaultColorToolbar = SkColorSetRGB(230, 230, 230);
#else
const SkColor kDefaultColorToolbar = SkColorSetRGB(223, 223, 223);
#endif
const SkColor kDefaultColorTabText = SK_ColorBLACK;
#if defined(OS_MACOSX)
const SkColor kDefaultColorBackgroundTabText = SK_ColorBLACK;
#else
const SkColor kDefaultColorBackgroundTabText = SkColorSetRGB(64, 64, 64);
#endif
const SkColor kDefaultColorBookmarkText = SK_ColorBLACK;
#if defined(OS_WIN)
const SkColor kDefaultColorNTPBackground =
    color_utils::GetSysSkColor(COLOR_WINDOW);
const SkColor kDefaultColorNTPText =
    color_utils::GetSysSkColor(COLOR_WINDOWTEXT);
const SkColor kDefaultColorNTPLink =
    color_utils::GetSysSkColor(COLOR_HOTLIGHT);
#else
// TODO(beng): source from theme provider.
const SkColor kDefaultColorNTPBackground = SK_ColorWHITE;
const SkColor kDefaultColorNTPText = SK_ColorBLACK;
const SkColor kDefaultColorNTPLink = SkColorSetRGB(6, 55, 116);
#endif
const SkColor kDefaultColorNTPHeader = SkColorSetRGB(150, 150, 150);
const SkColor kDefaultColorNTPSection = SkColorSetRGB(229, 229, 229);
const SkColor kDefaultColorNTPSectionText = SK_ColorBLACK;
const SkColor kDefaultColorNTPSectionLink = SkColorSetRGB(6, 55, 116);
const SkColor kDefaultColorButtonBackground = SkColorSetARGB(0, 0, 0, 0);

// Default tints.
const color_utils::HSL kDefaultTintButtons = { -1, -1, -1 };
const color_utils::HSL kDefaultTintFrame = { -1, -1, -1 };
const color_utils::HSL kDefaultTintFrameInactive = { -1, -1, 0.75f };
const color_utils::HSL kDefaultTintFrameIncognito = { -1, 0.2f, 0.35f };
const color_utils::HSL kDefaultTintFrameIncognitoInactive = { -1, 0.3f, 0.6f };
const color_utils::HSL kDefaultTintBackgroundTab = { -1, 0.5, 0.75 };

// Default display properties.
const int kDefaultDisplayPropertyNTPAlignment =
    ThemeProperties::ALIGN_CENTER;
const int kDefaultDisplayPropertyNTPTiling =
    ThemeProperties::NO_REPEAT;
// By default, we do not use the ntp alternate logo.
const int kDefaultDisplayPropertyNTPAlternateLogo = 0;

// ----------------------------------------------------------------------------
// Defaults for properties which are not stored in the browser theme pack.

const SkColor kDefaultColorControlBackground = SK_ColorWHITE;
const SkColor kDefaultColorToolbarSeparator = SkColorSetRGB(170, 170, 171);

#if defined(OS_MACOSX)
const SkColor kDefaultColorToolbarButtonStroke = SkColorSetARGB(75, 81, 81, 81);
const SkColor kDefaultColorToolbarButtonStrokeInactive =
    SkColorSetARGB(75, 99, 99, 99);
const SkColor kDefaultColorToolbarBezel = SkColorSetRGB(204, 204, 204);
const SkColor kDefaultColorToolbarStroke = SkColorSetRGB(103, 103, 103);
const SkColor kDefaultColorToolbarStrokeInactive = SkColorSetRGB(163, 163, 163);
#endif

// ----------------------------------------------------------------------------

// Strings used in alignment properties.
const char* kAlignmentCenter = "center";
const char* kAlignmentTop = "top";
const char* kAlignmentBottom = "bottom";
const char* kAlignmentLeft = "left";
const char* kAlignmentRight = "right";

// Strings used in background tiling repetition properties.
const char* kTilingNoRepeat = "no-repeat";
const char* kTilingRepeatX = "repeat-x";
const char* kTilingRepeatY = "repeat-y";
const char* kTilingRepeat = "repeat";

// The image resources that will be tinted by the 'button' tint value.
// If you change this list, you must increment the version number in
// browser_theme_pack.cc, and you should assign persistent IDs to the
// data table at the start of said file or else tinted versions of
// these resources will not be created.
const int kToolbarButtonIDs[] = {
  IDR_BACK, IDR_BACK_D, IDR_BACK_H, IDR_BACK_P,
  IDR_FORWARD, IDR_FORWARD_D, IDR_FORWARD_H, IDR_FORWARD_P,
  IDR_HOME, IDR_HOME_H, IDR_HOME_P,
  IDR_RELOAD, IDR_RELOAD_H, IDR_RELOAD_P,
  IDR_STOP, IDR_STOP_D, IDR_STOP_H, IDR_STOP_P,
  IDR_BROWSER_ACTIONS_OVERFLOW, IDR_BROWSER_ACTIONS_OVERFLOW_H,
  IDR_BROWSER_ACTIONS_OVERFLOW_P,
  IDR_TOOLS, IDR_TOOLS_H, IDR_TOOLS_P,
  IDR_MENU_DROPARROW,
  IDR_THROBBER, IDR_THROBBER_WAITING, IDR_THROBBER_LIGHT,
  IDR_TOOLBAR_BEZEL_HOVER, IDR_TOOLBAR_BEZEL_PRESSED, IDR_TOOLS_BAR,
};

SkColor TintForUnderline(SkColor input) {
  return SkColorSetA(input, SkColorGetA(input) / 3);
}

}  // namespace

// static
int ThemeProperties::StringToAlignment(const std::string& alignment) {
  std::vector<std::string> split;
  base::SplitStringAlongWhitespace(alignment, &split);

  int alignment_mask = 0;
  for (std::vector<std::string>::iterator component(split.begin());
       component != split.end(); ++component) {
    if (LowerCaseEqualsASCII(*component, kAlignmentTop))
      alignment_mask |= ALIGN_TOP;
    else if (LowerCaseEqualsASCII(*component, kAlignmentBottom))
      alignment_mask |= ALIGN_BOTTOM;
    else if (LowerCaseEqualsASCII(*component, kAlignmentLeft))
      alignment_mask |= ALIGN_LEFT;
    else if (LowerCaseEqualsASCII(*component, kAlignmentRight))
      alignment_mask |= ALIGN_RIGHT;
  }
  return alignment_mask;
}

// static
int ThemeProperties::StringToTiling(const std::string& tiling) {
  const char* component = tiling.c_str();

  if (base::strcasecmp(component, kTilingRepeatX) == 0)
    return REPEAT_X;
  if (base::strcasecmp(component, kTilingRepeatY) == 0)
    return REPEAT_Y;
  if (base::strcasecmp(component, kTilingRepeat) == 0)
    return REPEAT;
  // NO_REPEAT is the default choice.
  return NO_REPEAT;
}

// static
std::string ThemeProperties::AlignmentToString(int alignment) {
  // Convert from an AlignmentProperty back into a string.
  std::string vertical_string(kAlignmentCenter);
  std::string horizontal_string(kAlignmentCenter);

  if (alignment & ALIGN_TOP)
    vertical_string = kAlignmentTop;
  else if (alignment & ALIGN_BOTTOM)
    vertical_string = kAlignmentBottom;

  if (alignment & ALIGN_LEFT)
    horizontal_string = kAlignmentLeft;
  else if (alignment & ALIGN_RIGHT)
    horizontal_string = kAlignmentRight;

  return horizontal_string + " " + vertical_string;
}

// static
std::string ThemeProperties::TilingToString(int tiling) {
  // Convert from a TilingProperty back into a string.
  if (tiling == REPEAT_X)
    return kTilingRepeatX;
  if (tiling == REPEAT_Y)
    return kTilingRepeatY;
  if (tiling == REPEAT)
    return kTilingRepeat;
  return kTilingNoRepeat;
}

// static
bool ThemeProperties::IsThemeableImage(int id) {
  // TODO(pkotwicz): Cache results to improve lookup speed.
  std::set<int> themeable_idrs;
  BrowserThemePack::GetThemeableImageIDRs(&themeable_idrs);
  return themeable_idrs.find(id) != themeable_idrs.end();
}

// static
const std::set<int>& ThemeProperties::GetTintableToolbarButtons() {
  CR_DEFINE_STATIC_LOCAL(std::set<int>, button_set, ());
  if (button_set.empty()) {
    button_set = std::set<int>(
        kToolbarButtonIDs,
        kToolbarButtonIDs + arraysize(kToolbarButtonIDs));
  }

  return button_set;
}

// static
color_utils::HSL ThemeProperties::GetDefaultTint(int id) {
  switch (id) {
    case TINT_FRAME:
      return kDefaultTintFrame;
    case TINT_FRAME_INACTIVE:
      return kDefaultTintFrameInactive;
    case TINT_FRAME_INCOGNITO:
      return kDefaultTintFrameIncognito;
    case TINT_FRAME_INCOGNITO_INACTIVE:
      return kDefaultTintFrameIncognitoInactive;
    case TINT_BUTTONS:
      return kDefaultTintButtons;
    case TINT_BACKGROUND_TAB:
      return kDefaultTintBackgroundTab;
    default:
      color_utils::HSL result = {-1, -1, -1};
      return result;
  }
}

// static
SkColor ThemeProperties::GetDefaultColor(int id) {
  switch (id) {
    // Properties stored in theme pack.
    case COLOR_FRAME:
      return kDefaultColorFrame;
    case COLOR_FRAME_INACTIVE:
      return kDefaultColorFrameInactive;
    case COLOR_FRAME_INCOGNITO:
      return kDefaultColorFrameIncognito;
    case COLOR_FRAME_INCOGNITO_INACTIVE:
      return kDefaultColorFrameIncognitoInactive;
    case COLOR_TOOLBAR:
      return kDefaultColorToolbar;
    case COLOR_TAB_TEXT:
      return kDefaultColorTabText;
    case COLOR_BACKGROUND_TAB_TEXT:
      return kDefaultColorBackgroundTabText;
    case COLOR_BOOKMARK_TEXT:
      return kDefaultColorBookmarkText;
    case COLOR_NTP_BACKGROUND:
      return kDefaultColorNTPBackground;
    case COLOR_NTP_TEXT:
      return kDefaultColorNTPText;
    case COLOR_NTP_LINK:
      return kDefaultColorNTPLink;
    case COLOR_NTP_LINK_UNDERLINE:
      return TintForUnderline(kDefaultColorNTPLink);
    case COLOR_NTP_HEADER:
      return kDefaultColorNTPHeader;
    case COLOR_NTP_SECTION:
      return kDefaultColorNTPSection;
    case COLOR_NTP_SECTION_TEXT:
      return kDefaultColorNTPSectionText;
    case COLOR_NTP_SECTION_LINK:
      return kDefaultColorNTPSectionLink;
    case COLOR_NTP_SECTION_LINK_UNDERLINE:
      return TintForUnderline(kDefaultColorNTPSectionLink);
    case COLOR_BUTTON_BACKGROUND:
      return kDefaultColorButtonBackground;

    // Properties not stored in theme pack.
    case COLOR_CONTROL_BACKGROUND:
      return kDefaultColorControlBackground;
    case COLOR_TOOLBAR_SEPARATOR:
      return kDefaultColorToolbarSeparator;
#if defined(OS_MACOSX)
    case COLOR_TOOLBAR_BUTTON_STROKE:
      return kDefaultColorToolbarButtonStroke;
    case COLOR_TOOLBAR_BUTTON_STROKE_INACTIVE:
      return kDefaultColorToolbarButtonStrokeInactive;
    case COLOR_TOOLBAR_BEZEL:
      return kDefaultColorToolbarBezel;
    case COLOR_TOOLBAR_STROKE:
      return kDefaultColorToolbarStroke;
    case COLOR_TOOLBAR_STROKE_INACTIVE:
      return kDefaultColorToolbarStrokeInactive;
#endif
    default:
      // Return a debugging red color.
      return SK_ColorRED;
  }
}

// static
int ThemeProperties::GetDefaultDisplayProperty(int id) {
  switch (id) {
    case NTP_BACKGROUND_ALIGNMENT:
      return kDefaultDisplayPropertyNTPAlignment;
    case NTP_BACKGROUND_TILING:
      return kDefaultDisplayPropertyNTPTiling;
    case NTP_LOGO_ALTERNATE:
      return kDefaultDisplayPropertyNTPAlternateLogo;
  }

  return -1;
}