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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "ui/gfx/platform_font_win.h" | |
| 6 | |
| 7 #include <windows.h> | |
| 8 #include <math.h> | |
| 9 | |
| 10 #include <algorithm> | |
| 11 #include <string> | |
| 12 | |
| 13 #include "base/logging.h" | |
| 14 #include "base/macros.h" | |
| 15 #include "base/strings/string_util.h" | |
| 16 #include "base/strings/sys_string_conversions.h" | |
| 17 #include "base/strings/utf_string_conversions.h" | |
| 18 #include "base/win/scoped_gdi_object.h" | |
| 19 #include "base/win/scoped_hdc.h" | |
| 20 #include "base/win/scoped_select_object.h" | |
| 21 #include "base/win/win_util.h" | |
| 22 #include "ui/gfx/canvas.h" | |
| 23 #include "ui/gfx/font.h" | |
| 24 #include "ui/gfx/font_render_params.h" | |
| 25 #include "ui/gfx/win/scoped_set_map_mode.h" | |
| 26 | |
| 27 namespace { | |
| 28 | |
| 29 // If the tmWeight field of a TEXTMETRIC structure has a value >= this, the | |
| 30 // font is bold. | |
| 31 const int kTextMetricWeightBold = 700; | |
| 32 | |
| 33 // Returns the minimum font size, using the minimum size callback, if set. | |
| 34 int GetMinimumFontSize() { | |
| 35 int min_font_size = 0; | |
| 36 if (gfx::PlatformFontWin::get_minimum_font_size_callback) | |
| 37 min_font_size = gfx::PlatformFontWin::get_minimum_font_size_callback(); | |
| 38 return min_font_size; | |
| 39 } | |
| 40 | |
| 41 // Returns either minimum font allowed for a current locale or | |
| 42 // lf_height + size_delta value. | |
| 43 int AdjustFontSize(int lf_height, int size_delta) { | |
| 44 if (lf_height < 0) { | |
| 45 lf_height -= size_delta; | |
| 46 } else { | |
| 47 lf_height += size_delta; | |
| 48 } | |
| 49 const int min_font_size = GetMinimumFontSize(); | |
| 50 // Make sure lf_height is not smaller than allowed min font size for current | |
| 51 // locale. | |
| 52 if (abs(lf_height) < min_font_size) { | |
| 53 return lf_height < 0 ? -min_font_size : min_font_size; | |
| 54 } else { | |
| 55 return lf_height; | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 // Sets style properties on |font_info| based on |font_style|. | |
| 60 void SetLogFontStyle(int font_style, LOGFONT* font_info) { | |
| 61 font_info->lfUnderline = (font_style & gfx::Font::UNDERLINE) != 0; | |
| 62 font_info->lfItalic = (font_style & gfx::Font::ITALIC) != 0; | |
| 63 font_info->lfWeight = (font_style & gfx::Font::BOLD) ? FW_BOLD : FW_NORMAL; | |
| 64 } | |
| 65 | |
| 66 void GetTextMetricsForFont(HDC hdc, HFONT font, TEXTMETRIC* text_metrics) { | |
| 67 base::win::ScopedSelectObject scoped_font(hdc, font); | |
| 68 GetTextMetrics(hdc, text_metrics); | |
| 69 } | |
| 70 | |
| 71 } // namespace | |
| 72 | |
| 73 namespace gfx { | |
| 74 | |
| 75 // static | |
| 76 PlatformFontWin::HFontRef* PlatformFontWin::base_font_ref_; | |
| 77 | |
| 78 // static | |
| 79 PlatformFontWin::AdjustFontCallback | |
| 80 PlatformFontWin::adjust_font_callback = NULL; | |
| 81 PlatformFontWin::GetMinimumFontSizeCallback | |
| 82 PlatformFontWin::get_minimum_font_size_callback = NULL; | |
| 83 | |
| 84 //////////////////////////////////////////////////////////////////////////////// | |
| 85 // PlatformFontWin, public | |
| 86 | |
| 87 PlatformFontWin::PlatformFontWin() : font_ref_(GetBaseFontRef()) { | |
| 88 } | |
| 89 | |
| 90 PlatformFontWin::PlatformFontWin(NativeFont native_font) { | |
| 91 InitWithCopyOfHFONT(native_font); | |
| 92 } | |
| 93 | |
| 94 PlatformFontWin::PlatformFontWin(const std::string& font_name, | |
| 95 int font_size) { | |
| 96 InitWithFontNameAndSize(font_name, font_size); | |
| 97 } | |
| 98 | |
| 99 Font PlatformFontWin::DeriveFontWithHeight(int height, int style) { | |
| 100 DCHECK_GE(height, 0); | |
| 101 if (GetHeight() == height && GetStyle() == style) | |
| 102 return Font(this); | |
| 103 | |
| 104 // CreateFontIndirect() doesn't return the largest size for the given height | |
| 105 // when decreasing the height. Iterate to find it. | |
| 106 if (GetHeight() > height) { | |
| 107 const int min_font_size = GetMinimumFontSize(); | |
| 108 Font font = DeriveFont(-1, style); | |
| 109 int font_height = font.GetHeight(); | |
| 110 int font_size = font.GetFontSize(); | |
| 111 while (font_height > height && font_size != min_font_size) { | |
| 112 font = font.Derive(-1, style); | |
| 113 if (font_height == font.GetHeight() && font_size == font.GetFontSize()) | |
| 114 break; | |
| 115 font_height = font.GetHeight(); | |
| 116 font_size = font.GetFontSize(); | |
| 117 } | |
| 118 return font; | |
| 119 } | |
| 120 | |
| 121 LOGFONT font_info; | |
| 122 GetObject(GetNativeFont(), sizeof(LOGFONT), &font_info); | |
| 123 font_info.lfHeight = height; | |
| 124 SetLogFontStyle(style, &font_info); | |
| 125 | |
| 126 HFONT hfont = CreateFontIndirect(&font_info); | |
| 127 return DeriveWithCorrectedSize(hfont); | |
| 128 } | |
| 129 | |
| 130 //////////////////////////////////////////////////////////////////////////////// | |
| 131 // PlatformFontWin, PlatformFont implementation: | |
| 132 | |
| 133 Font PlatformFontWin::DeriveFont(int size_delta, int style) const { | |
| 134 LOGFONT font_info; | |
| 135 GetObject(GetNativeFont(), sizeof(LOGFONT), &font_info); | |
| 136 const int requested_font_size = font_ref_->requested_font_size(); | |
| 137 font_info.lfHeight = AdjustFontSize(-requested_font_size, size_delta); | |
| 138 SetLogFontStyle(style, &font_info); | |
| 139 | |
| 140 HFONT hfont = CreateFontIndirect(&font_info); | |
| 141 return Font(new PlatformFontWin(CreateHFontRef(hfont))); | |
| 142 } | |
| 143 | |
| 144 int PlatformFontWin::GetHeight() const { | |
| 145 return font_ref_->height(); | |
| 146 } | |
| 147 | |
| 148 int PlatformFontWin::GetBaseline() const { | |
| 149 return font_ref_->baseline(); | |
| 150 } | |
| 151 | |
| 152 int PlatformFontWin::GetCapHeight() const { | |
| 153 return font_ref_->cap_height(); | |
| 154 } | |
| 155 | |
| 156 int PlatformFontWin::GetExpectedTextWidth(int length) const { | |
| 157 return length * std::min(font_ref_->GetDluBaseX(), | |
| 158 font_ref_->ave_char_width()); | |
| 159 } | |
| 160 | |
| 161 int PlatformFontWin::GetStyle() const { | |
| 162 return font_ref_->style(); | |
| 163 } | |
| 164 | |
| 165 std::string PlatformFontWin::GetFontName() const { | |
| 166 return font_ref_->font_name(); | |
| 167 } | |
| 168 | |
| 169 std::string PlatformFontWin::GetActualFontNameForTesting() const { | |
| 170 // With the current implementation on Windows, HFontRef::font_name() returns | |
| 171 // the font name taken from the HFONT handle, but it's not the name that comes | |
| 172 // from the font's metadata. See http://crbug.com/327287 | |
| 173 return font_ref_->font_name(); | |
| 174 } | |
| 175 | |
| 176 std::string PlatformFontWin::GetLocalizedFontName() const { | |
| 177 base::win::ScopedCreateDC memory_dc(CreateCompatibleDC(NULL)); | |
| 178 if (!memory_dc.Get()) | |
| 179 return GetFontName(); | |
| 180 | |
| 181 // When a font has a localized name for a language matching the system | |
| 182 // locale, GetTextFace() returns the localized name. | |
| 183 base::win::ScopedSelectObject font(memory_dc.Get(), font_ref_->hfont()); | |
| 184 wchar_t localized_font_name[LF_FACESIZE]; | |
| 185 int length = GetTextFace(memory_dc.Get(), arraysize(localized_font_name), | |
| 186 &localized_font_name[0]); | |
| 187 if (length <= 0) | |
| 188 return GetFontName(); | |
| 189 return base::SysWideToUTF8(localized_font_name); | |
| 190 } | |
| 191 | |
| 192 int PlatformFontWin::GetFontSize() const { | |
| 193 return font_ref_->font_size(); | |
| 194 } | |
| 195 | |
| 196 const FontRenderParams& PlatformFontWin::GetFontRenderParams() const { | |
| 197 CR_DEFINE_STATIC_LOCAL(const gfx::FontRenderParams, params, | |
| 198 (gfx::GetFontRenderParams(gfx::FontRenderParamsQuery(false), NULL))); | |
| 199 return params; | |
| 200 } | |
| 201 | |
| 202 NativeFont PlatformFontWin::GetNativeFont() const { | |
| 203 return font_ref_->hfont(); | |
| 204 } | |
| 205 | |
| 206 //////////////////////////////////////////////////////////////////////////////// | |
| 207 // Font, private: | |
| 208 | |
| 209 void PlatformFontWin::InitWithCopyOfHFONT(HFONT hfont) { | |
| 210 DCHECK(hfont); | |
| 211 LOGFONT font_info; | |
| 212 GetObject(hfont, sizeof(LOGFONT), &font_info); | |
| 213 font_ref_ = CreateHFontRef(CreateFontIndirect(&font_info)); | |
| 214 } | |
| 215 | |
| 216 void PlatformFontWin::InitWithFontNameAndSize(const std::string& font_name, | |
| 217 int font_size) { | |
| 218 HFONT hf = ::CreateFont(-font_size, 0, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE, | |
| 219 DEFAULT_CHARSET, | |
| 220 OUT_DEFAULT_PRECIS, | |
| 221 CLIP_DEFAULT_PRECIS, | |
| 222 DEFAULT_QUALITY, | |
| 223 DEFAULT_PITCH | FF_DONTCARE, | |
| 224 base::UTF8ToUTF16(font_name).c_str()); | |
| 225 font_ref_ = CreateHFontRef(hf); | |
| 226 } | |
| 227 | |
| 228 // static | |
| 229 PlatformFontWin::HFontRef* PlatformFontWin::GetBaseFontRef() { | |
| 230 if (base_font_ref_ == NULL) { | |
| 231 NONCLIENTMETRICS_XP metrics; | |
| 232 base::win::GetNonClientMetrics(&metrics); | |
| 233 | |
| 234 if (adjust_font_callback) | |
| 235 adjust_font_callback(&metrics.lfMessageFont); | |
| 236 metrics.lfMessageFont.lfHeight = | |
| 237 AdjustFontSize(metrics.lfMessageFont.lfHeight, 0); | |
| 238 HFONT font = CreateFontIndirect(&metrics.lfMessageFont); | |
| 239 DLOG_ASSERT(font); | |
| 240 base_font_ref_ = PlatformFontWin::CreateHFontRef(font); | |
| 241 // base_font_ref_ is global, up the ref count so it's never deleted. | |
| 242 base_font_ref_->AddRef(); | |
| 243 } | |
| 244 return base_font_ref_; | |
| 245 } | |
| 246 | |
| 247 PlatformFontWin::HFontRef* PlatformFontWin::CreateHFontRef(HFONT font) { | |
| 248 TEXTMETRIC font_metrics; | |
| 249 | |
| 250 { | |
| 251 base::win::ScopedGetDC screen_dc(NULL); | |
| 252 gfx::ScopedSetMapMode mode(screen_dc, MM_TEXT); | |
| 253 GetTextMetricsForFont(screen_dc, font, &font_metrics); | |
| 254 } | |
| 255 | |
| 256 return CreateHFontRef(font, font_metrics); | |
| 257 } | |
| 258 | |
| 259 PlatformFontWin::HFontRef* PlatformFontWin::CreateHFontRef( | |
| 260 HFONT font, | |
| 261 const TEXTMETRIC& font_metrics) { | |
| 262 const int height = std::max<int>(1, font_metrics.tmHeight); | |
| 263 const int baseline = std::max<int>(1, font_metrics.tmAscent); | |
| 264 const int cap_height = | |
| 265 std::max<int>(1, font_metrics.tmAscent - font_metrics.tmInternalLeading); | |
| 266 const int ave_char_width = std::max<int>(1, font_metrics.tmAveCharWidth); | |
| 267 const int font_size = | |
| 268 std::max<int>(1, font_metrics.tmHeight - font_metrics.tmInternalLeading); | |
| 269 int style = 0; | |
| 270 if (font_metrics.tmItalic) | |
| 271 style |= Font::ITALIC; | |
| 272 if (font_metrics.tmUnderlined) | |
| 273 style |= Font::UNDERLINE; | |
| 274 if (font_metrics.tmWeight >= kTextMetricWeightBold) | |
| 275 style |= Font::BOLD; | |
| 276 | |
| 277 return new HFontRef(font, font_size, height, baseline, cap_height, | |
| 278 ave_char_width, style); | |
| 279 } | |
| 280 | |
| 281 Font PlatformFontWin::DeriveWithCorrectedSize(HFONT base_font) { | |
| 282 base::win::ScopedGetDC screen_dc(NULL); | |
| 283 gfx::ScopedSetMapMode mode(screen_dc, MM_TEXT); | |
| 284 | |
| 285 base::win::ScopedGDIObject<HFONT> best_font(base_font); | |
| 286 TEXTMETRIC best_font_metrics; | |
| 287 GetTextMetricsForFont(screen_dc, best_font, &best_font_metrics); | |
| 288 | |
| 289 LOGFONT font_info; | |
| 290 GetObject(base_font, sizeof(LOGFONT), &font_info); | |
| 291 | |
| 292 // Set |lfHeight| to negative value to indicate it's the size, not the height. | |
| 293 font_info.lfHeight = | |
| 294 -(best_font_metrics.tmHeight - best_font_metrics.tmInternalLeading); | |
| 295 | |
| 296 do { | |
| 297 // Increment font size. Prefer font with greater size if its height isn't | |
| 298 // greater than height of base font. | |
| 299 font_info.lfHeight = AdjustFontSize(font_info.lfHeight, 1); | |
| 300 base::win::ScopedGDIObject<HFONT> font(CreateFontIndirect(&font_info)); | |
| 301 TEXTMETRIC font_metrics; | |
| 302 GetTextMetricsForFont(screen_dc, font, &font_metrics); | |
| 303 if (font_metrics.tmHeight > best_font_metrics.tmHeight) | |
| 304 break; | |
| 305 best_font.Set(font.release()); | |
| 306 best_font_metrics = font_metrics; | |
| 307 } while (true); | |
| 308 | |
| 309 return Font(new PlatformFontWin(CreateHFontRef(best_font.release()))); | |
| 310 } | |
| 311 | |
| 312 PlatformFontWin::PlatformFontWin(HFontRef* hfont_ref) : font_ref_(hfont_ref) { | |
| 313 } | |
| 314 | |
| 315 //////////////////////////////////////////////////////////////////////////////// | |
| 316 // PlatformFontWin::HFontRef: | |
| 317 | |
| 318 PlatformFontWin::HFontRef::HFontRef(HFONT hfont, | |
| 319 int font_size, | |
| 320 int height, | |
| 321 int baseline, | |
| 322 int cap_height, | |
| 323 int ave_char_width, | |
| 324 int style) | |
| 325 : hfont_(hfont), | |
| 326 font_size_(font_size), | |
| 327 height_(height), | |
| 328 baseline_(baseline), | |
| 329 cap_height_(cap_height), | |
| 330 ave_char_width_(ave_char_width), | |
| 331 style_(style), | |
| 332 dlu_base_x_(-1), | |
| 333 requested_font_size_(font_size) { | |
| 334 DLOG_ASSERT(hfont); | |
| 335 | |
| 336 LOGFONT font_info; | |
| 337 GetObject(hfont_, sizeof(LOGFONT), &font_info); | |
| 338 font_name_ = base::UTF16ToUTF8(base::string16(font_info.lfFaceName)); | |
| 339 if (font_info.lfHeight < 0) | |
| 340 requested_font_size_ = -font_info.lfHeight; | |
| 341 } | |
| 342 | |
| 343 int PlatformFontWin::HFontRef::GetDluBaseX() { | |
| 344 if (dlu_base_x_ != -1) | |
| 345 return dlu_base_x_; | |
| 346 | |
| 347 base::win::ScopedGetDC screen_dc(NULL); | |
| 348 base::win::ScopedSelectObject font(screen_dc, hfont_); | |
| 349 gfx::ScopedSetMapMode mode(screen_dc, MM_TEXT); | |
| 350 | |
| 351 // Yes, this is how Microsoft recommends calculating the dialog unit | |
| 352 // conversions. See: http://support.microsoft.com/kb/125681 | |
| 353 SIZE ave_text_size; | |
| 354 GetTextExtentPoint32(screen_dc, | |
| 355 L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", | |
| 356 52, &ave_text_size); | |
| 357 dlu_base_x_ = (ave_text_size.cx / 26 + 1) / 2; | |
| 358 | |
| 359 DCHECK_NE(dlu_base_x_, -1); | |
| 360 return dlu_base_x_; | |
| 361 } | |
| 362 | |
| 363 PlatformFontWin::HFontRef::~HFontRef() { | |
| 364 DeleteObject(hfont_); | |
| 365 } | |
| 366 | |
| 367 //////////////////////////////////////////////////////////////////////////////// | |
| 368 // PlatformFont, public: | |
| 369 | |
| 370 // static | |
| 371 PlatformFont* PlatformFont::CreateDefault() { | |
| 372 return new PlatformFontWin; | |
| 373 } | |
| 374 | |
| 375 // static | |
| 376 PlatformFont* PlatformFont::CreateFromNativeFont(NativeFont native_font) { | |
| 377 return new PlatformFontWin(native_font); | |
| 378 } | |
| 379 | |
| 380 // static | |
| 381 PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name, | |
| 382 int font_size) { | |
| 383 return new PlatformFontWin(font_name, font_size); | |
| 384 } | |
| 385 | |
| 386 } // namespace gfx | |
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Issue 854713003:
More old files deletion. (Closed)
Base URL: https://github.com/domokit/mojo.git@master