icuSources/layoutex/layout/ParagraphLayout.h

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4  **********************************************************************
   5  *   Copyright (C) 2002-2014, International Business Machines
   6  *   Corporation and others.  All Rights Reserved.
   7  **********************************************************************
   8  */
   9
  10 #ifndef __PARAGRAPHLAYOUT_H
  11
  12 #define __PARAGRAPHLAYOUT_H
  13
  14 /**
  15  * \file
  16  * \brief C++ API: Paragraph Layout
  17  */
  18
  19 /*
  20  * ParagraphLayout doesn't make much sense without
  21  * BreakIterator...
  22  */
  23 #include "unicode/uscript.h"
  24 #if ! UCONFIG_NO_BREAK_ITERATION
  25
  26 #include "layout/LETypes.h"
  27 #include "layout/LEFontInstance.h"
  28 #include "layout/LayoutEngine.h"
  29 #include "unicode/ubidi.h"
  30 #include "unicode/brkiter.h"
  31
  32 #include "layout/RunArrays.h"
  33
  34 U_NAMESPACE_BEGIN
  35
  36 /**
  37  * ParagraphLayout.
  38  *
  39  * The <code>ParagraphLayout</code> object will analyze the text into runs of text in the
  40  * same font, script and direction, and will create a <code>LayoutEngine</code> object for each run.
  41  * The <code>LayoutEngine</code> will transform the characters into glyph codes in visual order.
  42  *
  43  * Clients can use this to break a paragraph into lines, and to display the glyphs in each line.
  44  *
  45  * Note that {@link icu::LayoutEngine} is deprecated, but this class is not.
  46  * You may use this class with the HarfBuzz icu-le-hb wrapper,
  47  *  see http://www.freedesktop.org/wiki/Software/HarfBuzz/
  48  *
  49  *  See http://userguide.icu-project.org/layoutengine for special build instructions.
  50  *
  51  * @see icu::LayoutEngine
  52  */
  53 class U_LAYOUTEX_API ParagraphLayout : public UObject
  54 {
  55 public:
  56     class VisualRun;
  57
  58     /**
  59      * This class represents a single line of text in a <code>ParagraphLayout</code>. They
  60      * can only be created by calling <code>ParagraphLayout::nextLine()</code>. Each line
  61      * consists of multiple visual runs, represented by <code>ParagraphLayout::VisualRun</code>
  62      * objects.
  63      *
  64      * @see ParagraphLayout
  65      * @see ParagraphLayout::VisualRun
  66      *
  67      * @stable ICU 3.2
  68      */
  69     class U_LAYOUTEX_API Line : public UObject
  70     {
  71     public:
  72         /**
  73          * The constructor is private since these objects can only be
  74          * created by <code>ParagraphLayout</code>. However, it is the
  75          * clients responsibility to destroy the objects, so the destructor
  76          * is public.
  77         *
  78         * @stable ICU 3.2
  79          */
  80         ~Line();
  81
  82         /**
  83          * Count the number of visual runs in the line.
  84          *
  85          * @return the number of visual runs.
  86          *
  87          * @stable ICU 3.2
  88          */
  89         inline le_int32 countRuns() const;
  90
  91         /**
  92          * Get the ascent of the line. This is the maximum ascent
  93          * of all the fonts on the line.
  94          *
  95          * @return the ascent of the line.
  96          *
  97          * @stable ICU 3.2
  98          */
  99         le_int32 getAscent() const;
 100
 101         /**
 102          * Get the descent of the line. This is the maximum descent
 103          * of all the fonts on the line.
 104          *
 105          * @return the descent of the line.
 106          *
 107          * @stable ICU 3.2
 108          */
 109         le_int32 getDescent() const;
 110
 111         /**
 112          * Get the leading of the line. This is the maximum leading
 113          * of all the fonts on the line.
 114          *
 115          * @return the leading of the line.
 116          *
 117          * @stable ICU 3.2
 118          */
 119         le_int32 getLeading() const;
 120
 121         /**
 122          * Get the width of the line. This is a convenience method
 123          * which returns the last X position of the last visual run
 124          * in the line.
 125          *
 126          * @return the width of the line.
 127          *
 128          * @stable ICU 2.8
 129          */
 130         le_int32 getWidth() const;
 131
 132         /**
 133          * Get a <code>ParagraphLayout::VisualRun</code> object for a given
 134          * visual run in the line.
 135          *
 136          * @param runIndex is the index of the run, in visual order.
 137          *
 138          * @return the <code>ParagraphLayout::VisualRun</code> object representing the
 139          *         visual run. This object is owned by the <code>Line</code> object which
 140          *         created it, and will remain valid for as long as the <code>Line</code>
 141          *         object is valid.
 142          *
 143          * @see ParagraphLayout::VisualRun
 144          *
 145          * @stable ICU 3.2
 146          */
 147         const VisualRun *getVisualRun(le_int32 runIndex) const;
 148
 149         /**
 150          * ICU "poor man's RTTI", returns a UClassID for this class.
 151          *
 152          * @stable ICU 3.2
 153          */
 154         static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
 155
 156         /**
 157          * ICU "poor man's RTTI", returns a UClassID for the actual class.
 158          *
 159          * @stable ICU 3.2
 160          */
 161         virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
 162
 163     private:
 164
 165         /**
 166          * The address of this static class variable serves as this class's ID
 167          * for ICU "poor man's RTTI".
 168          */
 169         static const char fgClassID;
 170
 171         friend class ParagraphLayout;
 172
 173         le_int32 fAscent;
 174         le_int32 fDescent;
 175         le_int32 fLeading;
 176
 177         le_int32 fRunCount;
 178         le_int32 fRunCapacity;
 179
 180         VisualRun **fRuns;
 181
 182         inline Line();
 183         inline Line(const Line &other);
 184         inline Line &operator=(const Line & /*other*/) { return *this; };
 185
 186         void computeMetrics();
 187
 188         void append(const LEFontInstance *font, UBiDiDirection direction, le_int32 glyphCount,
 189                     const LEGlyphID glyphs[], const float positions[], const le_int32 glyphToCharMap[]);
 190     };
 191
 192     /**
 193      * This object represents a single visual run in a line of text in
 194      * a paragraph. A visual run is text which is in the same font,
 195      * script, and direction. The text is represented by an array of
 196      * <code>LEGlyphIDs</code>, an array of (x, y) glyph positions and
 197      * a table which maps indices into the glyph array to indices into
 198      * the original character array which was used to create the paragraph.
 199      *
 200      * These objects are only created by <code>ParagraphLayout::Line</code> objects,
 201      * so their constructors and destructors are private.
 202      *
 203      * @see ParagraphLayout::Line
 204      *
 205      * @stable ICU 3.2
 206      */
 207     class U_LAYOUTEX_API VisualRun : public UObject
 208     {
 209     public:
 210         /**
 211          * Get the <code>LEFontInstance</code> object which
 212          * represents the font of the visual run. This will always
 213          * be a non-composite font.
 214          *
 215          * @return the <code>LEFontInstance</code> object which represents the
 216          *         font of the visual run.
 217          *
 218          * @see LEFontInstance
 219          *
 220          * @stable ICU 3.2
 221          */
 222         inline const LEFontInstance *getFont() const;
 223
 224         /**
 225          * Get the direction of the visual run.
 226          *
 227          * @return the direction of the run. This will be UBIDI_LTR if the
 228          *         run is left-to-right and UBIDI_RTL if the line is right-to-left.
 229          *
 230          * @stable ICU 3.2
 231          */
 232         inline UBiDiDirection getDirection() const;
 233
 234         /**
 235          * Get the number of glyphs in the visual run.
 236          *
 237          * @return the number of glyphs.
 238          *
 239          * @stable ICU 3.2
 240          */
 241         inline le_int32 getGlyphCount() const;
 242
 243         /**
 244          * Get the glyphs in the visual run. Glyphs with the values <code>0xFFFE</code> and
 245          * <code>0xFFFF</code> should be ignored.
 246          *
 247          * @return the address of the array of glyphs for this visual run. The storage
 248          *         is owned by the <code>VisualRun</code> object and must not be deleted.
 249          *         It will remain valid as long as the <code>VisualRun</code> object is valid.
 250          *
 251          * @stable ICU 3.2
 252          */
 253         inline const LEGlyphID *getGlyphs() const;
 254
 255         /**
 256          * Get the (x, y) positions of the glyphs in the visual run. To simplify storage
 257          * management, the x and y positions are stored in a single array with the x positions
 258          * at even offsets in the array and the corresponding y position in the following odd offset.
 259          * There is an extra (x, y) pair at the end of the array which represents the advance of
 260          * the final glyph in the run.
 261          *
 262          * @return the address of the array of glyph positions for this visual run. The storage
 263          *         is owned by the <code>VisualRun</code> object and must not be deleted.
 264          *         It will remain valid as long as the <code>VisualRun</code> object is valid.
 265          *
 266          * @stable ICU 3.2
 267          */
 268         inline const float *getPositions() const;
 269
 270         /**
 271          * Get the glyph-to-character map for this visual run. This maps the indices into
 272          * the glyph array to indices into the character array used to create the paragraph.
 273          *
 274          * @return the address of the character-to-glyph map for this visual run. The storage
 275          *         is owned by the <code>VisualRun</code> object and must not be deleted.
 276          *         It will remain valid as long as the <code>VisualRun</code> object is valid.
 277          *
 278          * @stable ICU 3.2
 279          */
 280         inline const le_int32 *getGlyphToCharMap() const;
 281
 282         /**
 283          * A convenience method which returns the ascent value for the font
 284          * associated with this run.
 285          *
 286          * @return the ascent value of this run's font.
 287          *
 288          * @stable ICU 3.2
 289          */
 290         inline le_int32 getAscent() const;
 291
 292         /**
 293          * A convenience method which returns the descent value for the font
 294          * associated with this run.
 295          *
 296          * @return the descent value of this run's font.
 297          *
 298          * @stable ICU 3.2
 299          */
 300         inline le_int32 getDescent() const;
 301
 302         /**
 303          * A convenience method which returns the leading value for the font
 304          * associated with this run.
 305          *
 306          * @return the leading value of this run's font.
 307          *
 308          * @stable ICU 3.2
 309          */
 310         inline le_int32 getLeading() const;
 311
 312         /**
 313          * ICU "poor man's RTTI", returns a UClassID for this class.
 314          *
 315          * @stable ICU 3.2
 316          */
 317         static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
 318
 319         /**
 320          * ICU "poor man's RTTI", returns a UClassID for the actual class.
 321          *
 322          * @stable ICU 3.2
 323          */
 324         virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
 325
 326     private:
 327
 328         /**
 329          * The address of this static class variable serves as this class's ID
 330          * for ICU "poor man's RTTI".
 331          */
 332         static const char fgClassID;
 333
 334         const LEFontInstance *fFont;
 335         const UBiDiDirection  fDirection;
 336
 337         const le_int32 fGlyphCount;
 338
 339         const LEGlyphID *fGlyphs;
 340         const float     *fPositions;
 341         const le_int32  *fGlyphToCharMap;
 342
 343         friend class Line;
 344
 345         inline VisualRun();
 346         inline VisualRun(const VisualRun &other);
 347         inline VisualRun &operator=(const VisualRun &/*other*/) { return *this; };
 348
 349         inline VisualRun(const LEFontInstance *font, UBiDiDirection direction, le_int32 glyphCount,
 350                   const LEGlyphID glyphs[], const float positions[], const le_int32 glyphToCharMap[]);
 351
 352         ~VisualRun();
 353     };
 354
 355     /**
 356      * Construct a <code>ParagraphLayout</code> object for a styled paragraph. The paragraph is specified
 357      * as runs of text all in the same font. An <code>LEFontInstance</code> object and a limit offset
 358      * are specified for each font run. The limit offset is the offset of the character immediately
 359      * after the font run.
 360      *
 361      * Clients can optionally specify directional runs and / or script runs. If these aren't specified
 362      * they will be computed.
 363      *
 364      * If any errors are encountered during construction, <code>status</code> will be set, and the object
 365      * will be set to be empty.
 366      *
 367      * @param chars is an array of the characters in the paragraph
 368      *
 369      * @param count is the number of characters in the paragraph.
 370      *
 371      * @param fontRuns a pointer to a <code>FontRuns</code> object representing the font runs.
 372      *
 373      * @param levelRuns is a pointer to a <code>ValueRuns</code> object representing the directional levels.
 374      *        If this pointer in <code>NULL</code> the levels will be determined by running the Unicde
 375      *        Bidi algorithm.
 376      *
 377      * @param scriptRuns is a pointer to a <code>ValueRuns</code> object representing script runs.
 378      *        If this pointer in <code>NULL</code> the script runs will be determined using the
 379      *        Unicode code points.
 380      *
 381      * @param localeRuns is a pointer to a <code>LocaleRuns</code> object representing locale runs.
 382      *        The <code>Locale</code> objects are used to determind the language of the text. If this
 383      *        pointer is <code>NULL</code> the default locale will be used for all of the text.
 384      *
 385      * @param paragraphLevel is the directionality of the paragraph, as in the UBiDi object.
 386      *
 387      * @param vertical is <code>TRUE</code> if the paragraph should be set vertically.
 388      *
 389      * @param status will be set to any error code encountered during construction.
 390      *
 391      * @see ubidi.h
 392      * @see LEFontInstance.h
 393      * @see LayoutEngine.h
 394      * @see RunArrays.h
 395      *
 396      * @stable ICU 2.8
 397      */
 398     ParagraphLayout(const LEUnicode chars[], le_int32 count,
 399                     const FontRuns *fontRuns,
 400                     const ValueRuns *levelRuns,
 401                     const ValueRuns *scriptRuns,
 402                     const LocaleRuns *localeRuns,
 403                     UBiDiLevel paragraphLevel, le_bool vertical,
 404                     LEErrorCode &status);
 405
 406     /**
 407      * The destructor. Virtual so that it works correctly with
 408      * sublcasses.
 409      *
 410      * @stable ICU 3.2
 411      */
 412     ~ParagraphLayout();
 413
 414     // Note: the following is #if 0'd out because there's no good
 415     // way to implement it without either calling layoutEngineFactory()
 416     // or duplicating the logic there...
 417 #if 0
 418     /**
 419      * Examine the given styled paragraph and determine if it contains any text which
 420      * requires complex processing. (i.e. that cannot be correctly rendered by
 421      * just mapping the characters to glyphs and rendering them in order)
 422      *
 423      * @param chars is an array of the characters in the paragraph
 424      *
 425      * @param count is the number of characters in the paragraph.
 426      *
 427      * @param fontRuns is a pointer to a <code>FontRuns</code> object representing the font runs.
 428      *
 429      * @return <code>TRUE</code> if the paragraph contains complex text.
 430      *
 431      * @stable ICU 3.2
 432      */
 433     static le_bool isComplex(const LEUnicode chars[], le_int32 count, const FontRuns *fontRuns);
 434 #else
 435     /**
 436      * Examine the given text and determine if it contains characters in any
 437      * script which requires complex processing to be rendered correctly.
 438      *
 439      * @param chars is an array of the characters in the paragraph
 440      *
 441      * @param count is the number of characters in the paragraph.
 442      *
 443      * @return <code>TRUE</code> if any of the text requires complex processing.
 444      *
 445      * @stable ICU 3.2
 446      */
 447     static le_bool isComplex(const LEUnicode chars[], le_int32 count);
 448
 449 #endif
 450
 451     /**
 452      * Return the resolved paragraph level. This is useful for those cases
 453      * where the bidi analysis has determined the level based on the first
 454      * strong character in the paragraph.
 455      *
 456      * @return the resolved paragraph level.
 457      *
 458      * @stable ICU 3.2
 459      */
 460     inline UBiDiLevel getParagraphLevel();
 461
 462     /**
 463      * Return the directionality of the text in the paragraph.
 464      *
 465      * @return <code>UBIDI_LTR</code> if the text is all left to right,
 466      *         <code>UBIDI_RTL</code> if the text is all right to left,
 467      *         or <code>UBIDI_MIXED</code> if the text has mixed direction.
 468      *
 469      * @stable ICU 3.2
 470      */
 471     inline UBiDiDirection getTextDirection();
 472
 473     /**
 474      * Return the max ascent value for all the fonts
 475      * in the paragraph.
 476      *
 477      * @return the ascent value.
 478      *
 479      * @stable ICU 3.2
 480      */
 481     virtual le_int32 getAscent() const;
 482
 483     /**
 484      * Return the max descent value for all the fonts
 485      * in the paragraph.
 486      *
 487      * @return the decent value.
 488      *
 489      * @stable ICU 3.2
 490      */
 491     virtual le_int32 getDescent() const;
 492
 493     /**
 494      * Return the max leading value for all the fonts
 495      * in the paragraph.
 496      *
 497      * @return the leading value.
 498      *
 499      * @stable ICU 3.2
 500      */
 501     virtual le_int32 getLeading() const;
 502
 503     /**
 504      * Reset line breaking to start from the beginning of the paragraph.
 505      *
 506      *
 507      * @stable ICU 3.2
 508      */
 509     inline void reflow();
 510
 511 #ifndef U_HIDE_INTERNAL_API
 512     /**
 513      *
 514      * Convenience method for determining if paragraph layout processing is complete ( i.e. there
 515      * are no more lines left to process. )
 516      *
 517      * @return true if there are no more lines to be processed
 518      *
 519      * @internal
 520      */
 521     inline le_bool isDone() const;
 522 #endif  /* U_HIDE_INTERNAL_API */
 523
 524     /**
 525      * Return a <code>ParagraphLayout::Line</code> object which represents next line
 526      * in the paragraph. The width of the line is specified each time so that it can
 527      * be varied to support arbitrary paragraph shapes.
 528      *
 529      * @param width is the width of the line. If <code>width</code> is less than or equal
 530      *              to zero, a <code>ParagraphLayout::Line</code> object representing the
 531      *              rest of the paragraph will be returned.
 532      *
 533      * @return a <code>ParagraphLayout::Line</code> object which represents the line. The caller
 534      *         is responsible for deleting the object. Returns <code>NULL</code> if there are no
 535      *         more lines in the paragraph.
 536      *
 537      * @see ParagraphLayout::Line
 538      *
 539      * @stable ICU 3.2
 540      */
 541     Line *nextLine(float width);
 542
 543     /**
 544      * ICU "poor man's RTTI", returns a UClassID for this class.
 545      *
 546      * @stable ICU 3.2
 547      */
 548     static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
 549
 550     /**
 551      * ICU "poor man's RTTI", returns a UClassID for the actual class.
 552      *
 553      * @stable ICU 3.2
 554      */
 555     virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
 556
 557 private:
 558
 559
 560     /**
 561      * The address of this static class variable serves as this class's ID
 562      * for ICU "poor man's RTTI".
 563      */
 564     static const char fgClassID;
 565
 566     struct StyleRunInfo
 567     {
 568           LayoutEngine   *engine;
 569     const LEFontInstance *font;
 570     const Locale         *locale;
 571           LEGlyphID      *glyphs;
 572           float          *positions;
 573           UScriptCode     script;
 574           UBiDiLevel      level;
 575           le_int32        runBase;
 576           le_int32        runLimit;
 577           le_int32        glyphBase;
 578           le_int32        glyphCount;
 579     };
 580
 581     ParagraphLayout() {};
 582     ParagraphLayout(const ParagraphLayout & /*other*/) : UObject( ){};
 583     inline ParagraphLayout &operator=(const ParagraphLayout & /*other*/) { return *this; };
 584
 585     void computeLevels(UBiDiLevel paragraphLevel);
 586
 587     Line *computeVisualRuns();
 588     void appendRun(Line *line, le_int32 run, le_int32 firstChar, le_int32 lastChar);
 589
 590     void computeScripts();
 591
 592     void computeLocales();
 593
 594     void computeSubFonts(const FontRuns *fontRuns, LEErrorCode &status);
 595
 596     void computeMetrics();
 597
 598     le_int32 getLanguageCode(const Locale *locale);
 599
 600     le_int32 getCharRun(le_int32 charIndex);
 601
 602     static le_bool isComplex(UScriptCode script);
 603
 604     le_int32 previousBreak(le_int32 charIndex);
 605
 606
 607     const LEUnicode *fChars;
 608           le_int32   fCharCount;
 609
 610     const FontRuns   *fFontRuns;
 611     const ValueRuns  *fLevelRuns;
 612     const ValueRuns  *fScriptRuns;
 613     const LocaleRuns *fLocaleRuns;
 614
 615           le_bool fVertical;
 616           le_bool fClientLevels;
 617           le_bool fClientScripts;
 618           le_bool fClientLocales;
 619
 620           UBiDiLevel *fEmbeddingLevels;
 621
 622           le_int32 fAscent;
 623           le_int32 fDescent;
 624           le_int32 fLeading;
 625
 626           le_int32 *fGlyphToCharMap;
 627           le_int32 *fCharToMinGlyphMap;
 628           le_int32 *fCharToMaxGlyphMap;
 629           float    *fGlyphWidths;
 630           le_int32  fGlyphCount;
 631
 632           UBiDi *fParaBidi;
 633           UBiDi *fLineBidi;
 634
 635           le_int32     *fStyleRunLimits;
 636           le_int32     *fStyleIndices;
 637           StyleRunInfo *fStyleRunInfo;
 638           le_int32      fStyleRunCount;
 639
 640           BreakIterator *fBreakIterator;
 641           le_int32       fLineStart;
 642           le_int32       fLineEnd;
 643
 644           le_int32       fFirstVisualRun;
 645           le_int32       fLastVisualRun;
 646           float          fVisualRunLastX;
 647           float          fVisualRunLastY;
 648 };
 649
 650 inline UBiDiLevel ParagraphLayout::getParagraphLevel()
 651 {
 652     return ubidi_getParaLevel(fParaBidi);
 653 }
 654
 655 inline UBiDiDirection ParagraphLayout::getTextDirection()
 656 {
 657     return ubidi_getDirection(fParaBidi);
 658 }
 659
 660 inline void ParagraphLayout::reflow()
 661 {
 662     fLineEnd = 0;
 663 }
 664
 665 inline ParagraphLayout::Line::Line()
 666     : UObject(), fAscent(0), fDescent(0), fLeading(0), fRunCount(0), fRunCapacity(0), fRuns(NULL)
 667 {
 668     // nothing else to do
 669 }
 670
 671 inline ParagraphLayout::Line::Line(const Line & /*other*/)
 672     : UObject(), fAscent(0), fDescent(0), fLeading(0), fRunCount(0), fRunCapacity(0), fRuns(NULL)
 673 {
 674     // nothing else to do
 675 }
 676
 677 inline le_int32 ParagraphLayout::Line::countRuns() const
 678 {
 679     return fRunCount;
 680 }
 681
 682 inline const LEFontInstance *ParagraphLayout::VisualRun::getFont() const
 683 {
 684     return fFont;
 685 }
 686
 687 inline UBiDiDirection ParagraphLayout::VisualRun::getDirection() const
 688 {
 689     return fDirection;
 690 }
 691
 692 inline le_int32 ParagraphLayout::VisualRun::getGlyphCount() const
 693 {
 694     return fGlyphCount;
 695 }
 696
 697 inline const LEGlyphID *ParagraphLayout::VisualRun::getGlyphs() const
 698 {
 699     return fGlyphs;
 700 }
 701
 702 inline const float *ParagraphLayout::VisualRun::getPositions() const
 703 {
 704     return fPositions;
 705 }
 706
 707 inline const le_int32 *ParagraphLayout::VisualRun::getGlyphToCharMap() const
 708 {
 709     return fGlyphToCharMap;
 710 }
 711
 712 inline le_int32 ParagraphLayout::VisualRun::getAscent() const
 713 {
 714     return fFont->getAscent();
 715 }
 716
 717 inline le_int32 ParagraphLayout::VisualRun::getDescent() const
 718 {
 719     return fFont->getDescent();
 720 }
 721
 722 inline le_int32 ParagraphLayout::VisualRun::getLeading() const
 723 {
 724     return fFont->getLeading();
 725 }
 726
 727 inline ParagraphLayout::VisualRun::VisualRun()
 728     : UObject(), fFont(NULL), fDirection(UBIDI_LTR), fGlyphCount(0), fGlyphs(NULL), fPositions(NULL), fGlyphToCharMap(NULL)
 729 {
 730     // nothing
 731 }
 732
 733 inline ParagraphLayout::VisualRun::VisualRun(const VisualRun &/*other*/)
 734     : UObject(), fFont(NULL), fDirection(UBIDI_LTR), fGlyphCount(0), fGlyphs(NULL), fPositions(NULL), fGlyphToCharMap(NULL)
 735 {
 736     // nothing
 737 }
 738
 739 inline ParagraphLayout::VisualRun::VisualRun(const LEFontInstance *font, UBiDiDirection direction, le_int32 glyphCount,
 740                                              const LEGlyphID glyphs[], const float positions[], const le_int32 glyphToCharMap[])
 741     : fFont(font), fDirection(direction), fGlyphCount(glyphCount),
 742       fGlyphs(glyphs), fPositions(positions), fGlyphToCharMap(glyphToCharMap)
 743 {
 744     // nothing else needs to be done!
 745 }
 746
 747 U_NAMESPACE_END
 748 #endif
 749 #endif