| // Copyright (c) 2011 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 "ui/base/l10n/l10n_util_win.h" |
| |
| #include <windowsx.h> |
| #include <algorithm> |
| #include <iterator> |
| |
| #include "base/i18n/rtl.h" |
| #include "base/lazy_instance.h" |
| #include "base/macros.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/win/i18n.h" |
| #include "ui/base/l10n/l10n_util.h" |
| #include "ui/display/display.h" |
| #include "ui/display/win/screen_win.h" |
| #include "ui/strings/grit/app_locale_settings.h" |
| |
| namespace { |
| |
| void AdjustLogFont(const base::string16& font_family, |
| double font_size_scaler, |
| double dpi_scale, |
| LOGFONT* logfont) { |
| DCHECK(font_size_scaler > 0); |
| font_size_scaler = std::max(std::min(font_size_scaler, 2.0), 0.7); |
| // Font metrics are computed in pixels and scale in high-DPI mode. |
| // Normalized by the DPI scale factor in order to work in DIP with |
| // Views/Aura. Call with dpi_scale=1 to keep the size in pixels. |
| font_size_scaler /= dpi_scale; |
| logfont->lfHeight = static_cast<long>(font_size_scaler * |
| static_cast<double>(abs(logfont->lfHeight)) + 0.5) * |
| (logfont->lfHeight > 0 ? 1 : -1); |
| |
| // TODO(jungshik): We may want to check the existence of the font. |
| // If it's not installed, we shouldn't adjust the font. |
| if (font_family != L"default") { |
| int name_len = std::min(static_cast<int>(font_family.size()), |
| LF_FACESIZE -1); |
| memcpy(logfont->lfFaceName, font_family.data(), name_len * sizeof(WORD)); |
| logfont->lfFaceName[name_len] = 0; |
| } |
| } |
| |
| class OverrideLocaleHolder { |
| public: |
| OverrideLocaleHolder() {} |
| const std::vector<std::string>& value() const { return value_; } |
| void swap_value(std::vector<std::string>* override_value) { |
| value_.swap(*override_value); |
| } |
| private: |
| std::vector<std::string> value_; |
| DISALLOW_COPY_AND_ASSIGN(OverrideLocaleHolder); |
| }; |
| |
| base::LazyInstance<OverrideLocaleHolder>::DestructorAtExit |
| override_locale_holder = LAZY_INSTANCE_INITIALIZER; |
| |
| } // namespace |
| |
| namespace l10n_util { |
| |
| int GetExtendedStyles() { |
| return !base::i18n::IsRTL() ? 0 : WS_EX_LAYOUTRTL | WS_EX_RTLREADING; |
| } |
| |
| int GetExtendedTooltipStyles() { |
| return !base::i18n::IsRTL() ? 0 : WS_EX_LAYOUTRTL; |
| } |
| |
| void HWNDSetRTLLayout(HWND hwnd) { |
| DWORD ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE); |
| |
| // We don't have to do anything if the style is already set for the HWND. |
| if (!(ex_style & WS_EX_LAYOUTRTL)) { |
| ex_style |= WS_EX_LAYOUTRTL; |
| ::SetWindowLong(hwnd, GWL_EXSTYLE, ex_style); |
| |
| // Right-to-left layout changes are not applied to the window immediately |
| // so we should make sure a WM_PAINT is sent to the window by invalidating |
| // the entire window rect. |
| ::InvalidateRect(hwnd, NULL, true); |
| } |
| } |
| |
| bool IsLocaleSupportedByOS(const std::string& locale) { |
| return true; |
| } |
| |
| bool NeedOverrideDefaultUIFont(base::string16* override_font_family, |
| double* font_size_scaler) { |
| // This is rather simple-minded to deal with the UI font size |
| // issue for some Indian locales (ml, bn, hi) for which |
| // the default Windows fonts are too small to be legible. For those |
| // locales, IDS_UI_FONT_FAMILY is set to an actual font family to |
| // use while for other locales, it's set to 'default'. |
| base::string16 ui_font_family = GetStringUTF16(IDS_UI_FONT_FAMILY); |
| int scaler100; |
| if (!base::StringToInt(l10n_util::GetStringUTF16(IDS_UI_FONT_SIZE_SCALER), |
| &scaler100)) |
| return false; |
| |
| // We use the OS default in two cases: |
| // 1) The resource bundle has 'default' and '100' for font family and |
| // font scaler. |
| // 2) The resource bundle is not available for some reason and |
| // ui_font_family is empty. |
| if ((ui_font_family == L"default" && scaler100 == 100) || |
| ui_font_family.empty()) |
| return false; |
| if (override_font_family && font_size_scaler) { |
| override_font_family->swap(ui_font_family); |
| *font_size_scaler = scaler100 / 100.0; |
| } |
| return true; |
| } |
| |
| void AdjustUIFont(LOGFONT* logfont) { |
| // Use the unforced scale so the font will be normalized to the correct DIP |
| // value. That way it'll appear the right size when the forced scale is |
| // applied later (when coverting to pixels). |
| AdjustUIFontForDIP(display::win::ScreenWin::GetSystemScaleFactor(), logfont); |
| } |
| |
| void AdjustUIFontForDIP(float dpi_scale, LOGFONT* logfont) { |
| base::string16 ui_font_family = L"default"; |
| double ui_font_size_scaler = 1; |
| if (NeedOverrideDefaultUIFont(&ui_font_family, &ui_font_size_scaler) || |
| dpi_scale != 1) { |
| AdjustLogFont(ui_font_family, ui_font_size_scaler, dpi_scale, logfont); |
| } |
| } |
| |
| void AdjustUIFontForWindow(HWND hwnd) { |
| base::string16 ui_font_family; |
| double ui_font_size_scaler; |
| if (NeedOverrideDefaultUIFont(&ui_font_family, &ui_font_size_scaler)) { |
| LOGFONT logfont; |
| if (GetObject(GetWindowFont(hwnd), sizeof(logfont), &logfont)) { |
| double dpi_scale = 1; |
| AdjustLogFont(ui_font_family, ui_font_size_scaler, dpi_scale, &logfont); |
| HFONT hfont = CreateFontIndirect(&logfont); |
| if (hfont) |
| SetWindowFont(hwnd, hfont, FALSE); |
| } |
| } |
| } |
| |
| void OverrideLocaleWithUILanguageList() { |
| std::vector<base::string16> ui_languages; |
| if (base::win::i18n::GetThreadPreferredUILanguageList(&ui_languages)) { |
| std::vector<std::string> ascii_languages; |
| ascii_languages.reserve(ui_languages.size()); |
| std::transform(ui_languages.begin(), ui_languages.end(), |
| std::back_inserter(ascii_languages), &base::UTF16ToASCII); |
| override_locale_holder.Get().swap_value(&ascii_languages); |
| } else { |
| NOTREACHED() << "Failed to determine the UI language for locale override."; |
| } |
| } |
| |
| const std::vector<std::string>& GetLocaleOverrides() { |
| return override_locale_holder.Get().value(); |
| } |
| |
| } // namespace l10n_util |