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1 /** @file
2 This module provide help function for displaying unicode string.
3
4 Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15
16
17
18 #include "UefiLibInternal.h"
19
20 typedef struct {
21 CHAR16 WChar;
22 UINT32 Width;
23 } UNICODE_WIDTH_ENTRY;
24
25 GLOBAL_REMOVE_IF_UNREFERENCED CONST UNICODE_WIDTH_ENTRY mUnicodeWidthTable[] = {
26 //
27 // General script area
28 //
29 {(CHAR16)0x1FFF, 1},
30 /*
31 * Merge the blocks and replace them with the above entry as they fall to
32 * the same category and they are all narrow glyph. This will reduce search
33 * time and table size. The merge will omit the reserved code.
34 *
35 * Remove the above item if below is un-commented.
36 *
37 {(CHAR16)0x007F, 1}, // C0 controls and basic Latin. 0x0000-0x007F
38 {(CHAR16)0x00FF, 1}, // C1 controls and Latin-1 support. 0x0080-0x00FF
39 {(CHAR16)0x017F, 1}, // Latin extended-A. 0x0100-0x017F
40 {(CHAR16)0x024F, 1}, // Latin extended-B. 0x0180-0x024F
41 {(CHAR16)0x02AF, 1}, // IPA extensions. 0x0250-0x02AF
42 {(CHAR16)0x02FF, 1}, // Spacing modifier letters. 0x02B0-0x02FF
43 {(CHAR16)0x036F, 1}, // Combining diacritical marks. 0x0300-0x036F
44 {(CHAR16)0x03FF, 1}, // Greek. 0x0370-0x03FF
45 {(CHAR16)0x04FF, 1}, // Cyrillic. 0x0400-0x04FF
46 {(CHAR16)0x052F, 0}, // Unassigned. As Armenian in ver3.0. 0x0500-0x052F
47 {(CHAR16)0x058F, 1}, // Armenian. 0x0530-0x058F
48 {(CHAR16)0x05FF, 1}, // Hebrew. 0x0590-0x05FF
49 {(CHAR16)0x06FF, 1}, // Arabic. 0x0600-0x06FF
50 {(CHAR16)0x08FF, 0}, // Unassigned. 0x0700-0x08FF
51 {(CHAR16)0x097F, 1}, // Devanagari. 0x0900-0x097F
52 {(CHAR16)0x09FF, 1}, // Bengali. 0x0980-0x09FF
53 {(CHAR16)0x0A7F, 1}, // Gurmukhi. 0x0A00-0x0A7F
54 {(CHAR16)0x0AFF, 1}, // Gujarati. 0x0A80-0x0AFF
55 {(CHAR16)0x0B7F, 1}, // Oriya. 0x0B00-0x0B7F
56 {(CHAR16)0x0BFF, 1}, // Tamil. (See page 7-92). 0x0B80-0x0BFF
57 {(CHAR16)0x0C7F, 1}, // Telugu. 0x0C00-0x0C7F
58 {(CHAR16)0x0CFF, 1}, // Kannada. (See page 7-100). 0x0C80-0x0CFF
59 {(CHAR16)0x0D7F, 1}, // Malayalam (See page 7-104). 0x0D00-0x0D7F
60 {(CHAR16)0x0DFF, 0}, // Unassigned. 0x0D80-0x0DFF
61 {(CHAR16)0x0E7F, 1}, // Thai. 0x0E00-0x0E7F
62 {(CHAR16)0x0EFF, 1}, // Lao. 0x0E80-0x0EFF
63 {(CHAR16)0x0FBF, 1}, // Tibetan. 0x0F00-0x0FBF
64 {(CHAR16)0x109F, 0}, // Unassigned. 0x0FC0-0x109F
65 {(CHAR16)0x10FF, 1}, // Georgian. 0x10A0-0x10FF
66 {(CHAR16)0x11FF, 1}, // Hangul Jamo. 0x1100-0x11FF
67 {(CHAR16)0x1DFF, 0}, // Unassigned. 0x1200-0x1DFF
68 {(CHAR16)0x1EFF, 1}, // Latin extended additional. 0x1E00-0x1EFF
69 {(CHAR16)0x1FFF, 1}, // Greek extended. 0x1F00-0x1FFF
70 *
71 */
72
73 //
74 // Symbol area
75 //
76 {(CHAR16)0x2FFF, 1},
77 /*
78 * Merge the blocks and replace them with the above entry as they fall to
79 * the same category and they are all narrow glyph. This will reduce search
80 * time and table size. The merge will omit the reserved code.
81 *
82 * Remove the above item if below is un-commented.
83 *
84 {(CHAR16)0x206F, 1}, // General punctuation. (See page7-154). 0x200-0x206F
85 {(CHAR16)0x209F, 1}, // Superscripts and subscripts. 0x2070-0x209F
86 {(CHAR16)0x20CF, 1}, // Currency symbols. 0x20A0-0x20CF
87 {(CHAR16)0x20FF, 1}, // Combining diacritical marks for symbols. 0x20D0-0x20FF
88 {(CHAR16)0x214F, 1}, // Letterlike sympbols. 0x2100-0x214F
89 {(CHAR16)0x218F, 1}, // Number forms. 0x2150-0x218F
90 {(CHAR16)0x21FF, 1}, // Arrows. 0x2190-0x21FF
91 {(CHAR16)0x22FF, 1}, // Mathematical operators. 0x2200-0x22FF
92 {(CHAR16)0x23FF, 1}, // Miscellaneous technical. 0x2300-0x23FF
93 {(CHAR16)0x243F, 1}, // Control pictures. 0x2400-0x243F
94 {(CHAR16)0x245F, 1}, // Optical character recognition. 0x2440-0x245F
95 {(CHAR16)0x24FF, 1}, // Enclosed alphanumerics. 0x2460-0x24FF
96 {(CHAR16)0x257F, 1}, // Box drawing. 0x2500-0x257F
97 {(CHAR16)0x259F, 1}, // Block elements. 0x2580-0x259F
98 {(CHAR16)0x25FF, 1}, // Geometric shapes. 0x25A0-0x25FF
99 {(CHAR16)0x26FF, 1}, // Miscellaneous symbols. 0x2600-0x26FF
100 {(CHAR16)0x27BF, 1}, // Dingbats. 0x2700-0x27BF
101 {(CHAR16)0x2FFF, 0}, // Reserved. 0x27C0-0x2FFF
102 *
103 */
104
105 //
106 // CJK phonetics and symbol area
107 //
108 {(CHAR16)0x33FF, 2},
109 /*
110 * Merge the blocks and replace them with the above entry as they fall to
111 * the same category and they are all wide glyph. This will reduce search
112 * time and table size. The merge will omit the reserved code.
113 *
114 * Remove the above item if below is un-commented.
115 *
116 {(CHAR16)0x303F, 2}, // CJK symbols and punctuation. 0x3000-0x303F
117 {(CHAR16)0x309F, 2}, // Hiragana. 0x3040-0x309F
118 {(CHAR16)0x30FF, 2}, // Katakana. 0x30A0-0x30FF
119 {(CHAR16)0x312F, 2}, // Bopomofo. 0x3100-0x312F
120 {(CHAR16)0x318F, 2}, // Hangul compatibility jamo. 0x3130-0x318F
121 {(CHAR16)0x319F, 2}, // Kanbun. 0x3190-0x319F
122 {(CHAR16)0x31FF, 0}, // Reserved. As Bopomofo extended in ver3.0. 0x31A0-0x31FF
123 {(CHAR16)0x32FF, 2}, // Enclosed CJK letters and months. 0x3200-0x32FF
124 {(CHAR16)0x33FF, 2}, // CJK compatibility. 0x3300-0x33FF
125 *
126 */
127
128 //
129 // CJK ideograph area
130 //
131 {(CHAR16)0x9FFF, 2},
132 /*
133 * Merge the blocks and replace them with the above entry as they fall to
134 * the same category and they are all wide glyph. This will reduce search
135 * time and table size. The merge will omit the reserved code.
136 *
137 * Remove the above item if below is un-commented.
138 *
139 {(CHAR16)0x4DFF, 0}, // Reserved. 0x3400-0x4DBF as CJK unified ideographs
140 // extension A in ver3.0. 0x3400-0x4DFF
141 {(CHAR16)0x9FFF, 2}, // CJK unified ideographs. 0x4E00-0x9FFF
142 *
143 */
144
145 //
146 // Reserved
147 //
148 {(CHAR16)0xABFF, 0}, // Reserved. 0xA000-0xA490 as Yi syllables. 0xA490-0xA4D0
149 // as Yi radicals in ver3.0. 0xA000-0xABFF
150 //
151 // Hangul syllables
152 //
153 {(CHAR16)0xD7FF, 2},
154 /*
155 * Merge the blocks and replace them with the above entry as they fall to
156 * the same category and they are all wide glyph. This will reduce search
157 * time and table size. The merge will omit the reserved code.
158 *
159 * Remove the above item if below is un-commented.
160 *
161 {(CHAR16)0xD7A3, 2}, // Hangul syllables. 0xAC00-0xD7A3
162 {(CHAR16)0xD7FF, 0}, // Reserved. 0xD7A3-0xD7FF
163 *
164 */
165
166 //
167 // Surrogates area
168 //
169 {(CHAR16)0xDFFF, 0}, // Surrogates, not used now. 0xD800-0xDFFF
170
171 //
172 // Private use area
173 //
174 {(CHAR16)0xF8FF, 0}, // Private use area. 0xE000-0xF8FF
175
176 //
177 // Compatibility area and specials
178 //
179 {(CHAR16)0xFAFF, 2}, // CJK compatibility ideographs. 0xF900-0xFAFF
180 {(CHAR16)0xFB4F, 1}, // Alphabetic presentation forms. 0xFB00-0xFB4F
181 {(CHAR16)0xFDFF, 1}, // Arabic presentation forms-A. 0xFB50-0xFDFF
182 {(CHAR16)0xFE1F, 0}, // Reserved. As variation selectors in ver3.0. 0xFE00-0xFE1F
183 {(CHAR16)0xFE2F, 1}, // Combining half marks. 0xFE20-0xFE2F
184 {(CHAR16)0xFE4F, 2}, // CJK compatibility forms. 0xFE30-0xFE4F
185 {(CHAR16)0xFE6F, 1}, // Small Form Variants. 0xFE50-0xFE6F
186 {(CHAR16)0xFEFF, 1}, // Arabic presentation forms-B. 0xFE70-0xFEFF
187 {(CHAR16)0xFFEF, 1}, // Half width and full width forms. 0xFF00-0xFFEF
188 {(CHAR16)0xFFFF, 0}, // Speicials. 0xFFF0-0xFFFF
189 };
190
191 /**
192 Retrieves the width of a Unicode character.
193
194 This function computes and returns the width of the Unicode character specified
195 by UnicodeChar.
196
197 @param UnicodeChar A Unicode character.
198
199 @retval 0 The width if UnicodeChar could not be determined.
200 @retval 1 UnicodeChar is a narrow glyph.
201 @retval 2 UnicodeChar is a wide glyph.
202
203 **/
204 UINTN
205 EFIAPI
206 GetGlyphWidth (
207 IN CHAR16 UnicodeChar
208 )
209 {
210 UINTN Index;
211 UINTN Low;
212 UINTN High;
213 CONST UNICODE_WIDTH_ENTRY *Item;
214
215 Item = NULL;
216 Low = 0;
217 High = (sizeof (mUnicodeWidthTable)) / (sizeof (UNICODE_WIDTH_ENTRY)) - 1;
218 while (Low <= High) {
219 Index = (Low + High) >> 1;
220 Item = &(mUnicodeWidthTable[Index]);
221 if (Index == 0) {
222 if (UnicodeChar <= Item->WChar) {
223 break;
224 }
225
226 return 0;
227 }
228
229 if (UnicodeChar > Item->WChar) {
230 Low = Index + 1;
231 } else if (UnicodeChar <= mUnicodeWidthTable[Index - 1].WChar) {
232 High = Index - 1;
233 } else {
234 //
235 // Index - 1 < UnicodeChar <= Index. Found
236 //
237 break;
238 }
239 }
240
241 if (Low <= High) {
242 return Item->Width;
243 }
244
245 return 0;
246 }
247
248 /**
249 Computes the display length of a Null-terminated Unicode String.
250
251 This function computes and returns the display length of the Null-terminated Unicode
252 string specified by String. If String is NULL then 0 is returned. If any of the widths
253 of the Unicode characters in String can not be determined, then 0 is returned. The display
254 width of String can be computed by summing the display widths of each Unicode character
255 in String. Unicode characters that are narrow glyphs have a width of 1, and Unicode
256 characters that are width glyphs have a width of 2.
257 If String is not aligned on a 16-bit boundary, then ASSERT().
258
259 @param String A pointer to a Null-terminated Unicode string.
260
261 @return The display length of the Null-terminated Unicode string specified by String.
262
263 **/
264 UINTN
265 EFIAPI
266 UnicodeStringDisplayLength (
267 IN CONST CHAR16 *String
268 )
269 {
270 UINTN Length;
271 UINTN Width;
272
273 if (String == NULL) {
274 return 0;
275 }
276
277 Length = 0;
278 while (*String != 0) {
279 Width = GetGlyphWidth (*String);
280 if (Width == 0) {
281 return 0;
282 }
283
284 Length += Width;
285 String++;
286 }
287
288 return Length;
289 }
290
291 /**
292 Draws a dialog box to the console output device specified by
293 ConOut defined in the EFI_SYSTEM_TABLE and waits for a keystroke
294 from the console input device specified by ConIn defined in the
295 EFI_SYSTEM_TABLE.
296
297 If there are no strings in the variable argument list, then ASSERT().
298 If all the strings in the variable argument list are empty, then ASSERT().
299
300 @param[in] Attribute Specifies the foreground and background color of the popup.
301 @param[out] Key A pointer to the EFI_KEY value of the key that was
302 pressed. This is an optional parameter that may be NULL.
303 If it is NULL then no wait for a keypress will be performed.
304 @param[in] ... The variable argument list that contains pointers to Null-
305 terminated Unicode strings to display in the dialog box.
306 The variable argument list is terminated by a NULL.
307
308 **/
309 VOID
310 EFIAPI
311 CreatePopUp (
312 IN UINTN Attribute,
313 OUT EFI_INPUT_KEY *Key, OPTIONAL
314 ...
315 )
316 {
317 VA_LIST Args;
318 EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *ConOut;
319 EFI_SIMPLE_TEXT_OUTPUT_MODE SavedConsoleMode;
320 UINTN Columns;
321 UINTN Rows;
322 UINTN Column;
323 UINTN Row;
324 UINTN NumberOfLines;
325 UINTN MaxLength;
326 CHAR16 *String;
327 UINTN Length;
328 CHAR16 *Line;
329 UINTN EventIndex;
330
331 //
332 // Determine the length of the longest line in the popup and the the total
333 // number of lines in the popup
334 //
335 VA_START (Args, Key);
336 MaxLength = 0;
337 NumberOfLines = 0;
338 while ((String = VA_ARG (Args, CHAR16 *)) != NULL) {
339 MaxLength = MAX (MaxLength, StrLen (String));
340 NumberOfLines++;
341 }
342 VA_END (Args);
343
344 //
345 // If the total number of lines in the popup is zero, then ASSERT()
346 //
347 ASSERT (NumberOfLines != 0);
348
349 //
350 // If the maximum length of all the strings is zero, then ASSERT()
351 //
352 ASSERT (MaxLength != 0);
353
354 //
355 // Cache a pointer to the Simple Text Output Protocol in the EFI System Table
356 //
357 ConOut = gST->ConOut;
358
359 //
360 // Save the current console cursor position and attributes
361 //
362 CopyMem (&SavedConsoleMode, ConOut->Mode, sizeof (SavedConsoleMode));
363
364 //
365 // Retrieve the number of columns and rows in the current console mode
366 //
367 ConOut->QueryMode (ConOut, SavedConsoleMode.Mode, &Columns, &Rows);
368
369 //
370 // Disable cursor and set the foreground and background colors specified by Attribute
371 //
372 ConOut->EnableCursor (ConOut, FALSE);
373 ConOut->SetAttribute (ConOut, Attribute);
374
375 //
376 // Limit NumberOfLines to height of the screen minus 3 rows for the box itself
377 //
378 NumberOfLines = MIN (NumberOfLines, Rows - 3);
379
380 //
381 // Limit MaxLength to width of the screen minus 2 columns for the box itself
382 //
383 MaxLength = MIN (MaxLength, Columns - 2);
384
385 //
386 // Compute the starting row and starting column for the popup
387 //
388 Row = (Rows - (NumberOfLines + 3)) / 2;
389 Column = (Columns - (MaxLength + 2)) / 2;
390
391 //
392 // Allocate a buffer for a single line of the popup with borders and a Null-terminator
393 //
394 Line = AllocateZeroPool ((MaxLength + 3) * sizeof (CHAR16));
395 ASSERT (Line != NULL);
396
397 //
398 // Draw top of popup box
399 //
400 SetMem16 (Line, (MaxLength + 2) * 2, BOXDRAW_HORIZONTAL);
401 Line[0] = BOXDRAW_DOWN_RIGHT;
402 Line[MaxLength + 1] = BOXDRAW_DOWN_LEFT;
403 Line[MaxLength + 2] = L'\0';
404 ConOut->SetCursorPosition (ConOut, Column, Row++);
405 ConOut->OutputString (ConOut, Line);
406
407 //
408 // Draw middle of the popup with strings
409 //
410 VA_START (Args, Key);
411 while ((String = VA_ARG (Args, CHAR16 *)) != NULL && NumberOfLines > 0) {
412 Length = StrLen (String);
413 SetMem16 (Line, (MaxLength + 2) * 2, L' ');
414 if (Length <= MaxLength) {
415 //
416 // Length <= MaxLength
417 //
418 CopyMem (Line + 1 + (MaxLength - Length) / 2, String , Length * sizeof (CHAR16));
419 } else {
420 //
421 // Length > MaxLength
422 //
423 CopyMem (Line + 1, String + (Length - MaxLength) / 2 , MaxLength * sizeof (CHAR16));
424 }
425 Line[0] = BOXDRAW_VERTICAL;
426 Line[MaxLength + 1] = BOXDRAW_VERTICAL;
427 Line[MaxLength + 2] = L'\0';
428 ConOut->SetCursorPosition (ConOut, Column, Row++);
429 ConOut->OutputString (ConOut, Line);
430 NumberOfLines--;
431 }
432 VA_END (Args);
433
434 //
435 // Draw bottom of popup box
436 //
437 SetMem16 (Line, (MaxLength + 2) * 2, BOXDRAW_HORIZONTAL);
438 Line[0] = BOXDRAW_UP_RIGHT;
439 Line[MaxLength + 1] = BOXDRAW_UP_LEFT;
440 Line[MaxLength + 2] = L'\0';
441 ConOut->SetCursorPosition (ConOut, Column, Row++);
442 ConOut->OutputString (ConOut, Line);
443
444 //
445 // Free the allocated line buffer
446 //
447 FreePool (Line);
448
449 //
450 // Restore the cursor visibility, position, and attributes
451 //
452 ConOut->EnableCursor (ConOut, SavedConsoleMode.CursorVisible);
453 ConOut->SetCursorPosition (ConOut, SavedConsoleMode.CursorColumn, SavedConsoleMode.CursorRow);
454 ConOut->SetAttribute (ConOut, SavedConsoleMode.Attribute);
455
456 //
457 // Wait for a keystroke
458 //
459 if (Key != NULL) {
460 gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
461 gST->ConIn->ReadKeyStroke (gST->ConIn, Key);
462 }
463 }
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