scintilla/src/ViewStyle.cxx

   1 // Scintilla source code edit control
   2 /** @file ViewStyle.cxx
   3  ** Store information on how the document is to be viewed.
   4  **/
   5 // Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include <string.h>
   9 #include <assert.h>
  10
  11 #include <stdexcept>
  12 #include <vector>
  13 #include <map>
  14
  15 #include "Platform.h"
  16
  17 #include "Scintilla.h"
  18 #include "Position.h"
  19 #include "SplitVector.h"
  20 #include "Partitioning.h"
  21 #include "RunStyles.h"
  22 #include "Indicator.h"
  23 #include "XPM.h"
  24 #include "LineMarker.h"
  25 #include "Style.h"
  26 #include "ViewStyle.h"
  27
  28 #ifdef SCI_NAMESPACE
  29 using namespace Scintilla;
  30 #endif
  31
  32 MarginStyle::MarginStyle() :
  33         style(SC_MARGIN_SYMBOL), width(0), mask(0), sensitive(false), cursor(SC_CURSORREVERSEARROW) {
  34 }
  35
  36 // A list of the fontnames - avoids wasting space in each style
  37 FontNames::FontNames() {
  38 }
  39
  40 FontNames::~FontNames() {
  41         Clear();
  42 }
  43
  44 void FontNames::Clear() {
  45         for (std::vector<char *>::const_iterator it=names.begin(); it != names.end(); ++it) {
  46                 delete []*it;
  47         }
  48         names.clear();
  49 }
  50
  51 const char *FontNames::Save(const char *name) {
  52         if (!name)
  53                 return 0;
  54
  55         for (std::vector<char *>::const_iterator it=names.begin(); it != names.end(); ++it) {
  56                 if (strcmp(*it, name) == 0) {
  57                         return *it;
  58                 }
  59         }
  60         const size_t lenName = strlen(name) + 1;
  61         char *nameSave = new char[lenName];
  62         memcpy(nameSave, name, lenName);
  63         names.push_back(nameSave);
  64         return nameSave;
  65 }
  66
  67 FontRealised::FontRealised() {
  68 }
  69
  70 FontRealised::~FontRealised() {
  71         font.Release();
  72 }
  73
  74 void FontRealised::Realise(Surface &surface, int zoomLevel, int technology, const FontSpecification &fs) {
  75         PLATFORM_ASSERT(fs.fontName);
  76         sizeZoomed = fs.size + zoomLevel * SC_FONT_SIZE_MULTIPLIER;
  77         if (sizeZoomed <= 2 * SC_FONT_SIZE_MULTIPLIER)  // Hangs if sizeZoomed <= 1
  78                 sizeZoomed = 2 * SC_FONT_SIZE_MULTIPLIER;
  79
  80         float deviceHeight = static_cast<float>(surface.DeviceHeightFont(sizeZoomed));
  81         FontParameters fp(fs.fontName, deviceHeight / SC_FONT_SIZE_MULTIPLIER, fs.weight, fs.italic, fs.extraFontFlag, technology, fs.characterSet);
  82         font.Create(fp);
  83
  84         ascent = static_cast<unsigned int>(surface.Ascent(font));
  85         descent = static_cast<unsigned int>(surface.Descent(font));
  86         aveCharWidth = surface.AverageCharWidth(font);
  87         spaceWidth = surface.WidthChar(font, ' ');
  88 }
  89
  90 ViewStyle::ViewStyle() {
  91         Init();
  92 }
  93
  94 ViewStyle::ViewStyle(const ViewStyle &source) {
  95         Init(source.styles.size());
  96         for (unsigned int sty=0; sty<source.styles.size(); sty++) {
  97                 styles[sty] = source.styles[sty];
  98                 // Can't just copy fontname as its lifetime is relative to its owning ViewStyle
  99                 styles[sty].fontName = fontNames.Save(source.styles[sty].fontName);
 100         }
 101         nextExtendedStyle = source.nextExtendedStyle;
 102         for (int mrk=0; mrk<=MARKER_MAX; mrk++) {
 103                 markers[mrk] = source.markers[mrk];
 104         }
 105         CalcLargestMarkerHeight();
 106         indicatorsDynamic = 0;
 107         indicatorsSetFore = 0;
 108         for (int ind=0; ind<=INDIC_MAX; ind++) {
 109                 indicators[ind] = source.indicators[ind];
 110                 if (indicators[ind].IsDynamic())
 111                         indicatorsDynamic++;
 112                 if (indicators[ind].OverridesTextFore())
 113                         indicatorsSetFore++;
 114         }
 115
 116         selColours = source.selColours;
 117         selAdditionalForeground = source.selAdditionalForeground;
 118         selAdditionalBackground = source.selAdditionalBackground;
 119         selBackground2 = source.selBackground2;
 120         selAlpha = source.selAlpha;
 121         selAdditionalAlpha = source.selAdditionalAlpha;
 122         selEOLFilled = source.selEOLFilled;
 123
 124         foldmarginColour = source.foldmarginColour;
 125         foldmarginHighlightColour = source.foldmarginHighlightColour;
 126
 127         hotspotColours = source.hotspotColours;
 128         hotspotUnderline = source.hotspotUnderline;
 129         hotspotSingleLine = source.hotspotSingleLine;
 130
 131         whitespaceColours = source.whitespaceColours;
 132         controlCharSymbol = source.controlCharSymbol;
 133         controlCharWidth = source.controlCharWidth;
 134         selbar = source.selbar;
 135         selbarlight = source.selbarlight;
 136         caretcolour = source.caretcolour;
 137         additionalCaretColour = source.additionalCaretColour;
 138         showCaretLineBackground = source.showCaretLineBackground;
 139         alwaysShowCaretLineBackground = source.alwaysShowCaretLineBackground;
 140         caretLineBackground = source.caretLineBackground;
 141         caretLineAlpha = source.caretLineAlpha;
 142         edgecolour = source.edgecolour;
 143         edgeState = source.edgeState;
 144         caretStyle = source.caretStyle;
 145         caretWidth = source.caretWidth;
 146         someStylesProtected = false;
 147         someStylesForceCase = false;
 148         leftMarginWidth = source.leftMarginWidth;
 149         rightMarginWidth = source.rightMarginWidth;
 150         for (int margin=0; margin <= SC_MAX_MARGIN; margin++) {
 151                 ms[margin] = source.ms[margin];
 152         }
 153         maskInLine = source.maskInLine;
 154         fixedColumnWidth = source.fixedColumnWidth;
 155         marginInside = source.marginInside;
 156         textStart = source.textStart;
 157         zoomLevel = source.zoomLevel;
 158         viewWhitespace = source.viewWhitespace;
 159         whitespaceSize = source.whitespaceSize;
 160         viewIndentationGuides = source.viewIndentationGuides;
 161         viewEOL = source.viewEOL;
 162         extraFontFlag = source.extraFontFlag;
 163         extraAscent = source.extraAscent;
 164         extraDescent = source.extraDescent;
 165         marginStyleOffset = source.marginStyleOffset;
 166         annotationVisible = source.annotationVisible;
 167         annotationStyleOffset = source.annotationStyleOffset;
 168         braceHighlightIndicatorSet = source.braceHighlightIndicatorSet;
 169         braceHighlightIndicator = source.braceHighlightIndicator;
 170         braceBadLightIndicatorSet = source.braceBadLightIndicatorSet;
 171         braceBadLightIndicator = source.braceBadLightIndicator;
 172
 173         theEdge = source.theEdge;
 174
 175         marginNumberPadding = source.marginNumberPadding;
 176         ctrlCharPadding = source.ctrlCharPadding;
 177         lastSegItalicsOffset = source.lastSegItalicsOffset;
 178
 179         wrapState = source.wrapState;
 180         wrapVisualFlags = source.wrapVisualFlags;
 181         wrapVisualFlagsLocation = source.wrapVisualFlagsLocation;
 182         wrapVisualStartIndent = source.wrapVisualStartIndent;
 183         wrapIndentMode = source.wrapIndentMode;
 184 }
 185
 186 ViewStyle::~ViewStyle() {
 187         styles.clear();
 188         for (FontMap::iterator it = fonts.begin(); it != fonts.end(); ++it) {
 189                 delete it->second;
 190         }
 191         fonts.clear();
 192 }
 193
 194 void ViewStyle::Init(size_t stylesSize_) {
 195         AllocStyles(stylesSize_);
 196         nextExtendedStyle = 256;
 197         fontNames.Clear();
 198         ResetDefaultStyle();
 199
 200         // There are no image markers by default, so no need for calling CalcLargestMarkerHeight()
 201         largestMarkerHeight = 0;
 202
 203         indicators[0] = Indicator(INDIC_SQUIGGLE, ColourDesired(0, 0x7f, 0));
 204         indicators[1] = Indicator(INDIC_TT, ColourDesired(0, 0, 0xff));
 205         indicators[2] = Indicator(INDIC_PLAIN, ColourDesired(0xff, 0, 0));
 206
 207         technology = SC_TECHNOLOGY_DEFAULT;
 208         indicatorsDynamic = 0;
 209         indicatorsSetFore = 0;
 210         lineHeight = 1;
 211         lineOverlap = 0;
 212         maxAscent = 1;
 213         maxDescent = 1;
 214         aveCharWidth = 8;
 215         spaceWidth = 8;
 216         tabWidth = spaceWidth * 8;
 217
 218         selColours.fore = ColourOptional(ColourDesired(0xff, 0, 0));
 219         selColours.back = ColourOptional(ColourDesired(0xc0, 0xc0, 0xc0), true);
 220         selAdditionalForeground = ColourDesired(0xff, 0, 0);
 221         selAdditionalBackground = ColourDesired(0xd7, 0xd7, 0xd7);
 222         selBackground2 = ColourDesired(0xb0, 0xb0, 0xb0);
 223         selAlpha = SC_ALPHA_NOALPHA;
 224         selAdditionalAlpha = SC_ALPHA_NOALPHA;
 225         selEOLFilled = false;
 226
 227         foldmarginColour = ColourOptional(ColourDesired(0xff, 0, 0));
 228         foldmarginHighlightColour = ColourOptional(ColourDesired(0xc0, 0xc0, 0xc0));
 229
 230         whitespaceColours.fore = ColourOptional();
 231         whitespaceColours.back = ColourOptional(ColourDesired(0xff, 0xff, 0xff));
 232         controlCharSymbol = 0;  /* Draw the control characters */
 233         controlCharWidth = 0;
 234         selbar = Platform::Chrome();
 235         selbarlight = Platform::ChromeHighlight();
 236         styles[STYLE_LINENUMBER].fore = ColourDesired(0, 0, 0);
 237         styles[STYLE_LINENUMBER].back = Platform::Chrome();
 238         caretcolour = ColourDesired(0, 0, 0);
 239         additionalCaretColour = ColourDesired(0x7f, 0x7f, 0x7f);
 240         showCaretLineBackground = false;
 241         alwaysShowCaretLineBackground = false;
 242         caretLineBackground = ColourDesired(0xff, 0xff, 0);
 243         caretLineAlpha = SC_ALPHA_NOALPHA;
 244         edgecolour = ColourDesired(0xc0, 0xc0, 0xc0);
 245         edgeState = EDGE_NONE;
 246         caretStyle = CARETSTYLE_LINE;
 247         caretWidth = 1;
 248         someStylesProtected = false;
 249         someStylesForceCase = false;
 250
 251         hotspotColours.fore = ColourOptional(ColourDesired(0, 0, 0xff));
 252         hotspotColours.back = ColourOptional(ColourDesired(0xff, 0xff, 0xff));
 253         hotspotUnderline = true;
 254         hotspotSingleLine = true;
 255
 256         leftMarginWidth = 1;
 257         rightMarginWidth = 1;
 258         ms[0].style = SC_MARGIN_NUMBER;
 259         ms[0].width = 0;
 260         ms[0].mask = 0;
 261         ms[1].style = SC_MARGIN_SYMBOL;
 262         ms[1].width = 16;
 263         ms[1].mask = ~SC_MASK_FOLDERS;
 264         ms[2].style = SC_MARGIN_SYMBOL;
 265         ms[2].width = 0;
 266         ms[2].mask = 0;
 267         marginInside = true;
 268         fixedColumnWidth = marginInside ? leftMarginWidth : 0;
 269         maskInLine = 0xffffffff;
 270         for (int margin=0; margin <= SC_MAX_MARGIN; margin++) {
 271                 fixedColumnWidth += ms[margin].width;
 272                 if (ms[margin].width > 0)
 273                         maskInLine &= ~ms[margin].mask;
 274         }
 275         textStart = marginInside ? fixedColumnWidth : leftMarginWidth;
 276         zoomLevel = 0;
 277         viewWhitespace = wsInvisible;
 278         whitespaceSize = 1;
 279         viewIndentationGuides = ivNone;
 280         viewEOL = false;
 281         extraFontFlag = 0;
 282         extraAscent = 0;
 283         extraDescent = 0;
 284         marginStyleOffset = 0;
 285         annotationVisible = ANNOTATION_HIDDEN;
 286         annotationStyleOffset = 0;
 287         braceHighlightIndicatorSet = false;
 288         braceHighlightIndicator = 0;
 289         braceBadLightIndicatorSet = false;
 290         braceBadLightIndicator = 0;
 291
 292         theEdge = 0;
 293
 294         marginNumberPadding = 3;
 295         ctrlCharPadding = 3; // +3 For a blank on front and rounded edge each side
 296         lastSegItalicsOffset = 2;
 297
 298         wrapState = eWrapNone;
 299         wrapVisualFlags = 0;
 300         wrapVisualFlagsLocation = 0;
 301         wrapVisualStartIndent = 0;
 302         wrapIndentMode = SC_WRAPINDENT_FIXED;
 303 }
 304
 305 void ViewStyle::Refresh(Surface &surface, int tabInChars) {
 306         for (FontMap::iterator it = fonts.begin(); it != fonts.end(); ++it) {
 307                 delete it->second;
 308         }
 309         fonts.clear();
 310
 311         selbar = Platform::Chrome();
 312         selbarlight = Platform::ChromeHighlight();
 313
 314         for (unsigned int i=0; i<styles.size(); i++) {
 315                 styles[i].extraFontFlag = extraFontFlag;
 316         }
 317
 318         CreateAndAddFont(styles[STYLE_DEFAULT]);
 319         for (unsigned int j=0; j<styles.size(); j++) {
 320                 CreateAndAddFont(styles[j]);
 321         }
 322
 323         for (FontMap::iterator it = fonts.begin(); it != fonts.end(); ++it) {
 324                 it->second->Realise(surface, zoomLevel, technology, it->first);
 325         }
 326
 327         for (unsigned int k=0; k<styles.size(); k++) {
 328                 FontRealised *fr = Find(styles[k]);
 329                 styles[k].Copy(fr->font, *fr);
 330         }
 331         indicatorsDynamic = 0;
 332         indicatorsSetFore = 0;
 333         for (int ind = 0; ind <= INDIC_MAX; ind++) {
 334                 if (indicators[ind].IsDynamic())
 335                         indicatorsDynamic++;
 336                 if (indicators[ind].OverridesTextFore())
 337                         indicatorsSetFore++;
 338         }
 339         maxAscent = 1;
 340         maxDescent = 1;
 341         FindMaxAscentDescent();
 342         maxAscent += extraAscent;
 343         maxDescent += extraDescent;
 344         lineHeight = maxAscent + maxDescent;
 345         lineOverlap = lineHeight / 10;
 346         if (lineOverlap < 2)
 347                 lineOverlap = 2;
 348         if (lineOverlap > lineHeight)
 349                 lineOverlap = lineHeight;
 350
 351         someStylesProtected = false;
 352         someStylesForceCase = false;
 353         for (unsigned int l=0; l<styles.size(); l++) {
 354                 if (styles[l].IsProtected()) {
 355                         someStylesProtected = true;
 356                 }
 357                 if (styles[l].caseForce != Style::caseMixed) {
 358                         someStylesForceCase = true;
 359                 }
 360         }
 361
 362         aveCharWidth = styles[STYLE_DEFAULT].aveCharWidth;
 363         spaceWidth = styles[STYLE_DEFAULT].spaceWidth;
 364         tabWidth = spaceWidth * tabInChars;
 365
 366         controlCharWidth = 0.0;
 367         if (controlCharSymbol >= 32) {
 368                 controlCharWidth = surface.WidthChar(styles[STYLE_CONTROLCHAR].font, static_cast<char>(controlCharSymbol));
 369         }
 370
 371         fixedColumnWidth = marginInside ? leftMarginWidth : 0;
 372         maskInLine = 0xffffffff;
 373         for (int margin=0; margin <= SC_MAX_MARGIN; margin++) {
 374                 fixedColumnWidth += ms[margin].width;
 375                 if (ms[margin].width > 0)
 376                         maskInLine &= ~ms[margin].mask;
 377         }
 378         textStart = marginInside ? fixedColumnWidth : leftMarginWidth;
 379 }
 380
 381 void ViewStyle::ReleaseAllExtendedStyles() {
 382         nextExtendedStyle = 256;
 383 }
 384
 385 int ViewStyle::AllocateExtendedStyles(int numberStyles) {
 386         int startRange = static_cast<int>(nextExtendedStyle);
 387         nextExtendedStyle += numberStyles;
 388         EnsureStyle(nextExtendedStyle);
 389         for (size_t i=startRange; i<nextExtendedStyle; i++) {
 390                 styles[i].ClearTo(styles[STYLE_DEFAULT]);
 391         }
 392         return startRange;
 393 }
 394
 395 void ViewStyle::EnsureStyle(size_t index) {
 396         if (index >= styles.size()) {
 397                 AllocStyles(index+1);
 398         }
 399 }
 400
 401 void ViewStyle::ResetDefaultStyle() {
 402         styles[STYLE_DEFAULT].Clear(ColourDesired(0,0,0),
 403                 ColourDesired(0xff,0xff,0xff),
 404                 Platform::DefaultFontSize() * SC_FONT_SIZE_MULTIPLIER, fontNames.Save(Platform::DefaultFont()),
 405                 SC_CHARSET_DEFAULT,
 406                 SC_WEIGHT_NORMAL, false, false, false, Style::caseMixed, true, true, false);
 407 }
 408
 409 void ViewStyle::ClearStyles() {
 410         // Reset all styles to be like the default style
 411         for (unsigned int i=0; i<styles.size(); i++) {
 412                 if (i != STYLE_DEFAULT) {
 413                         styles[i].ClearTo(styles[STYLE_DEFAULT]);
 414                 }
 415         }
 416         styles[STYLE_LINENUMBER].back = Platform::Chrome();
 417
 418         // Set call tip fore/back to match the values previously set for call tips
 419         styles[STYLE_CALLTIP].back = ColourDesired(0xff, 0xff, 0xff);
 420         styles[STYLE_CALLTIP].fore = ColourDesired(0x80, 0x80, 0x80);
 421 }
 422
 423 void ViewStyle::SetStyleFontName(int styleIndex, const char *name) {
 424         styles[styleIndex].fontName = fontNames.Save(name);
 425 }
 426
 427 bool ViewStyle::ProtectionActive() const {
 428         return someStylesProtected;
 429 }
 430
 431 int ViewStyle::ExternalMarginWidth() const {
 432         return marginInside ? 0 : fixedColumnWidth;
 433 }
 434
 435 bool ViewStyle::ValidStyle(size_t styleIndex) const {
 436         return styleIndex < styles.size();
 437 }
 438
 439 void ViewStyle::CalcLargestMarkerHeight() {
 440         largestMarkerHeight = 0;
 441         for (int m = 0; m <= MARKER_MAX; ++m) {
 442                 switch (markers[m].markType) {
 443                 case SC_MARK_PIXMAP:
 444                         if (markers[m].pxpm && markers[m].pxpm->GetHeight() > largestMarkerHeight)
 445                                 largestMarkerHeight = markers[m].pxpm->GetHeight();
 446                         break;
 447                 case SC_MARK_RGBAIMAGE:
 448                         if (markers[m].image && markers[m].image->GetHeight() > largestMarkerHeight)
 449                                 largestMarkerHeight = markers[m].image->GetHeight();
 450                         break;
 451                 }
 452         }
 453 }
 454
 455 // See if something overrides the line background color:  Either if caret is on the line
 456 // and background color is set for that, or if a marker is defined that forces its background
 457 // color onto the line, or if a marker is defined but has no selection margin in which to
 458 // display itself (as long as it's not an SC_MARK_EMPTY marker).  These are checked in order
 459 // with the earlier taking precedence.  When multiple markers cause background override,
 460 // the color for the highest numbered one is used.
 461 ColourOptional ViewStyle::Background(int marksOfLine, bool caretActive, bool lineContainsCaret) const {
 462         ColourOptional background;
 463         if ((caretActive || alwaysShowCaretLineBackground) && showCaretLineBackground && (caretLineAlpha == SC_ALPHA_NOALPHA) && lineContainsCaret) {
 464                 background = ColourOptional(caretLineBackground, true);
 465         }
 466         if (!background.isSet && marksOfLine) {
 467                 int marks = marksOfLine;
 468                 for (int markBit = 0; (markBit < 32) && marks; markBit++) {
 469                         if ((marks & 1) && (markers[markBit].markType == SC_MARK_BACKGROUND) &&
 470                                 (markers[markBit].alpha == SC_ALPHA_NOALPHA)) {
 471                                 background = ColourOptional(markers[markBit].back, true);
 472                         }
 473                         marks >>= 1;
 474                 }
 475         }
 476         if (!background.isSet && maskInLine) {
 477                 int marksMasked = marksOfLine & maskInLine;
 478                 if (marksMasked) {
 479                         for (int markBit = 0; (markBit < 32) && marksMasked; markBit++) {
 480                                 if ((marksMasked & 1) && (markers[markBit].markType != SC_MARK_EMPTY) &&
 481                                         (markers[markBit].alpha == SC_ALPHA_NOALPHA)) {
 482                                         background = ColourOptional(markers[markBit].back, true);
 483                                 }
 484                                 marksMasked >>= 1;
 485                         }
 486                 }
 487         }
 488         return background;
 489 }
 490
 491 bool ViewStyle::SelectionBackgroundDrawn() const {
 492         return selColours.back.isSet &&
 493                 ((selAlpha == SC_ALPHA_NOALPHA) || (selAdditionalAlpha == SC_ALPHA_NOALPHA));
 494 }
 495
 496 bool ViewStyle::WhitespaceBackgroundDrawn() const {
 497         return (viewWhitespace != wsInvisible) && (whitespaceColours.back.isSet);
 498 }
 499
 500 ColourDesired ViewStyle::WrapColour() const {
 501         if (whitespaceColours.fore.isSet)
 502                 return whitespaceColours.fore;
 503         else
 504                 return styles[STYLE_DEFAULT].fore;
 505 }
 506
 507 bool ViewStyle::SetWrapState(int wrapState_) {
 508         WrapMode wrapStateWanted;
 509         switch (wrapState_) {
 510         case SC_WRAP_WORD:
 511                 wrapStateWanted = eWrapWord;
 512                 break;
 513         case SC_WRAP_CHAR:
 514                 wrapStateWanted = eWrapChar;
 515                 break;
 516         case SC_WRAP_WHITESPACE:
 517                 wrapStateWanted = eWrapWhitespace;
 518                 break;
 519         default:
 520                 wrapStateWanted = eWrapNone;
 521                 break;
 522         }
 523         bool changed = wrapState != wrapStateWanted;
 524         wrapState = wrapStateWanted;
 525         return changed;
 526 }
 527
 528 bool ViewStyle::SetWrapVisualFlags(int wrapVisualFlags_) {
 529         bool changed = wrapVisualFlags != wrapVisualFlags_;
 530         wrapVisualFlags = wrapVisualFlags_;
 531         return changed;
 532 }
 533
 534 bool ViewStyle::SetWrapVisualFlagsLocation(int wrapVisualFlagsLocation_) {
 535         bool changed = wrapVisualFlagsLocation != wrapVisualFlagsLocation_;
 536         wrapVisualFlagsLocation = wrapVisualFlagsLocation_;
 537         return changed;
 538 }
 539
 540 bool ViewStyle::SetWrapVisualStartIndent(int wrapVisualStartIndent_) {
 541         bool changed = wrapVisualStartIndent != wrapVisualStartIndent_;
 542         wrapVisualStartIndent = wrapVisualStartIndent_;
 543         return changed;
 544 }
 545
 546 bool ViewStyle::SetWrapIndentMode(int wrapIndentMode_) {
 547         bool changed = wrapIndentMode != wrapIndentMode_;
 548         wrapIndentMode = wrapIndentMode_;
 549         return changed;
 550 }
 551
 552 void ViewStyle::AllocStyles(size_t sizeNew) {
 553         size_t i=styles.size();
 554         styles.resize(sizeNew);
 555         if (styles.size() > STYLE_DEFAULT) {
 556                 for (; i<sizeNew; i++) {
 557                         if (i != STYLE_DEFAULT) {
 558                                 styles[i].ClearTo(styles[STYLE_DEFAULT]);
 559                         }
 560                 }
 561         }
 562 }
 563
 564 void ViewStyle::CreateAndAddFont(const FontSpecification &fs) {
 565         if (fs.fontName) {
 566                 FontMap::iterator it = fonts.find(fs);
 567                 if (it == fonts.end()) {
 568                         fonts[fs] = new FontRealised();
 569                 }
 570         }
 571 }
 572
 573 FontRealised *ViewStyle::Find(const FontSpecification &fs) {
 574         if (!fs.fontName)       // Invalid specification so return arbitrary object
 575                 return fonts.begin()->second;
 576         FontMap::iterator it = fonts.find(fs);
 577         if (it != fonts.end()) {
 578                 // Should always reach here since map was just set for all styles
 579                 return it->second;
 580         }
 581         return 0;
 582 }
 583
 584 void ViewStyle::FindMaxAscentDescent() {
 585         for (FontMap::const_iterator it = fonts.begin(); it != fonts.end(); ++it) {
 586                 if (maxAscent < it->second->ascent)
 587                         maxAscent = it->second->ascent;
 588                 if (maxDescent < it->second->descent)
 589                         maxDescent = it->second->descent;
 590         }
 591 }