contrib/src/stc/scintilla/include/Platform.h

   1 // Scintilla source code edit control
   2 /** @file Platform.h
   3  ** Interface to platform facilities. Also includes some basic utilities.
   4  ** Implemented in PlatGTK.cxx for GTK+/Linux, PlatWin.cxx for Windows, and PlatWX.cxx for wxWindows.
   5  **/
   6 // Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
   7 // The License.txt file describes the conditions under which this software may be distributed.
   8
   9 #ifndef PLATFORM_H
  10 #define PLATFORM_H
  11
  12 // PLAT_GTK = GTK+ on Linux or Win32
  13 // PLAT_GTK_WIN32 is defined additionally when running PLAT_GTK under Win32
  14 // PLAT_WIN = Win32 API on Win32 OS
  15 // PLAT_WX is wxWindows on any supported platform
  16
  17 #define PLAT_GTK 0
  18 #define PLAT_GTK_WIN32 0
  19 #define PLAT_WIN 0
  20 #define PLAT_WX  0
  21 #define PLAT_FOX 0
  22
  23 #if defined(FOX)
  24 #undef PLAT_FOX
  25 #define PLAT_FOX 1
  26
  27 #elif defined(__WX__)
  28 #undef PLAT_WX
  29 #define PLAT_WX  1
  30
  31 #elif defined(GTK)
  32 #undef PLAT_GTK
  33 #define PLAT_GTK 1
  34
  35 #ifdef _MSC_VER
  36 #undef PLAT_GTK_WIN32
  37 #define PLAT_GTK_WIN32 1
  38 #endif
  39
  40 #else
  41 #undef PLAT_WIN
  42 #define PLAT_WIN 1
  43
  44 #endif
  45
  46
  47 #if PLAT_WX
  48 #include <wx/object.h>  // For the global memory operators, if needed.
  49 #endif
  50
  51
  52 // Underlying the implementation of the platform classes are platform specific types.
  53 // Sometimes these need to be passed around by client code so they are defined here
  54
  55 typedef void *FontID;
  56 typedef void *SurfaceID;
  57 typedef void *WindowID;
  58 typedef void *MenuID;
  59 typedef void *TickerID;
  60
  61 /**
  62  * A geometric point class.
  63  * Point is exactly the same as the Win32 POINT and GTK+ GdkPoint so can be used interchangeably.
  64  */
  65 class Point {
  66 public:
  67         int x;
  68         int y;
  69
  70         Point(int x_=0, int y_=0) : x(x_), y(y_) {
  71         }
  72
  73         // Other automatically defined methods (assignment, copy constructor, destructor) are fine
  74
  75         static Point FromLong(long lpoint);
  76 };
  77
  78 /**
  79  * A geometric rectangle class.
  80  * PRectangle is exactly the same as the Win32 RECT so can be used interchangeably.
  81  * PRectangles contain their top and left sides, but not their right and bottom sides.
  82  */
  83 class PRectangle {
  84 public:
  85         int left;
  86         int top;
  87         int right;
  88         int bottom;
  89
  90         PRectangle(int left_=0, int top_=0, int right_=0, int bottom_ = 0) :
  91                 left(left_), top(top_), right(right_), bottom(bottom_) {
  92         }
  93
  94         // Other automatically defined methods (assignment, copy constructor, destructor) are fine
  95
  96         bool operator==(PRectangle &rc) {
  97                 return (rc.left == left) && (rc.right == right) &&
  98                         (rc.top == top) && (rc.bottom == bottom);
  99         }
 100         bool Contains(Point pt) {
 101                 return (pt.x >= left) && (pt.x <= right) &&
 102                         (pt.y >= top) && (pt.y <= bottom);
 103         }
 104         bool Contains(PRectangle rc) {
 105                 return (rc.left >= left) && (rc.right <= right) &&
 106                         (rc.top >= top) && (rc.bottom <= bottom);
 107         }
 108         bool Intersects(PRectangle other) {
 109                 return (right > other.left) && (left < other.right) &&
 110                         (bottom > other.top) && (top < other.bottom);
 111         }
 112         int Width() { return right - left; }
 113         int Height() { return bottom - top; }
 114 };
 115
 116 /**
 117  * In some circumstances, including Win32 in paletted mode and GTK+, each colour
 118  * must be allocated before use. The desired colours are held in the ColourDesired class,
 119  * and after allocation the allocation entry is stored in the ColourAllocated class. In other
 120  * circumstances, such as Win32 in true colour mode, the allocation process just copies
 121  * the RGB values from the desired to the allocated class.
 122  * As each desired colour requires allocation before it can be used, the ColourPair class
 123  * holds both a ColourDesired and a ColourAllocated
 124  * The Palette class is responsible for managing the palette of colours which contains a
 125  * list of ColourPair objects and performs the allocation.
 126  */
 127
 128 /**
 129  * Holds a desired RGB colour.
 130  */
 131 class ColourDesired {
 132         long co;
 133 public:
 134         ColourDesired(long lcol=0) {
 135                 co = lcol;
 136         }
 137
 138         ColourDesired(unsigned int red, unsigned int green, unsigned int blue) {
 139                 co = red | (green << 8) | (blue << 16);
 140         }
 141
 142         bool operator==(const ColourDesired &other) const {
 143                 return co == other.co;
 144         }
 145
 146         void Set(long lcol) {
 147                 co = lcol;
 148         }
 149
 150         long AsLong() const {
 151                 return co;
 152         }
 153
 154         unsigned int GetRed() {
 155                 return co & 0xff;
 156         }
 157
 158         unsigned int GetGreen() {
 159                 return (co >> 8) & 0xff;
 160         }
 161
 162         unsigned int GetBlue() {
 163                 return (co >> 16) & 0xff;
 164         }
 165 };
 166
 167 /**
 168  * Holds an allocated RGB colour which may be an approximation to the desired colour.
 169  */
 170 class ColourAllocated {
 171         long coAllocated;
 172
 173 public:
 174
 175         ColourAllocated(long lcol=0) {
 176                 coAllocated = lcol;
 177         }
 178
 179         void Set(long lcol) {
 180                 coAllocated = lcol;
 181         }
 182
 183         long AsLong() const {
 184                 return coAllocated;
 185         }
 186 };
 187
 188 /**
 189  * Colour pairs hold a desired colour and an allocated colour.
 190  */
 191 struct ColourPair {
 192         ColourDesired desired;
 193         ColourAllocated allocated;
 194
 195         ColourPair(ColourDesired desired_=ColourDesired(0,0,0)) {
 196                 desired = desired_;
 197                 allocated.Set(desired.AsLong());
 198         }
 199 };
 200
 201 class Window;   // Forward declaration for Palette
 202
 203 /**
 204  * Colour palette management.
 205  */
 206 class Palette {
 207         int used;
 208         enum {numEntries = 100};
 209         ColourPair entries[numEntries];
 210 #if PLAT_GTK
 211         void *allocatedPalette; // GdkColor *
 212         int allocatedLen;
 213 #endif
 214 public:
 215 #if PLAT_WIN
 216         void *hpal;
 217 #endif
 218         bool allowRealization;
 219
 220         Palette();
 221         ~Palette();
 222
 223         void Release();
 224
 225         /**
 226          * This method either adds a colour to the list of wanted colours (want==true)
 227          * or retrieves the allocated colour back to the ColourPair.
 228          * This is one method to make it easier to keep the code for wanting and retrieving in sync.
 229          */
 230         void WantFind(ColourPair &cp, bool want);
 231
 232         void Allocate(Window &w);
 233 };
 234
 235 /**
 236  * Font management.
 237  */
 238 class Font {
 239 protected:
 240         FontID id;
 241 #if PLAT_WX
 242         int ascent;
 243 #endif
 244         // Private so Font objects can not be copied
 245         Font(const Font &) {}
 246         Font &operator=(const Font &) { id=0; return *this; }
 247 public:
 248         Font();
 249         virtual ~Font();
 250
 251         virtual void Create(const char *faceName, int characterSet, int size, bool bold, bool italic);
 252         virtual void Release();
 253
 254         FontID GetID() { return id; }
 255         // Alias another font - caller guarantees not to Release
 256         void SetID(FontID id_) { id = id_; }
 257         friend class Surface;
 258         friend class SurfaceImpl;
 259 };
 260
 261 /**
 262  * A surface abstracts a place to draw.
 263  */
 264 class Surface {
 265 private:
 266         // Private so Surface objects can not be copied
 267         Surface(const Surface &) {}
 268         Surface &operator=(const Surface &) { return *this; }
 269 public:
 270         Surface() {};
 271         virtual ~Surface() {};
 272         static Surface *Allocate();
 273
 274         virtual void Init()=0;
 275         virtual void Init(SurfaceID sid)=0;
 276         virtual void InitPixMap(int width, int height, Surface *surface_)=0;
 277
 278         virtual void Release()=0;
 279         virtual bool Initialised()=0;
 280         virtual void PenColour(ColourAllocated fore)=0;
 281         virtual int LogPixelsY()=0;
 282         virtual int DeviceHeightFont(int points)=0;
 283         virtual void MoveTo(int x_, int y_)=0;
 284         virtual void LineTo(int x_, int y_)=0;
 285         virtual void Polygon(Point *pts, int npts, ColourAllocated fore, ColourAllocated back)=0;
 286         virtual void RectangleDraw(PRectangle rc, ColourAllocated fore, ColourAllocated back)=0;
 287         virtual void FillRectangle(PRectangle rc, ColourAllocated back)=0;
 288         virtual void FillRectangle(PRectangle rc, Surface &surfacePattern)=0;
 289         virtual void RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back)=0;
 290         virtual void Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back)=0;
 291         virtual void Copy(PRectangle rc, Point from, Surface &surfaceSource)=0;
 292
 293         virtual void DrawTextNoClip(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back)=0;
 294         virtual void DrawTextClipped(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back)=0;
 295         virtual void MeasureWidths(Font &font_, const char *s, int len, int *positions)=0;
 296         virtual int WidthText(Font &font_, const char *s, int len)=0;
 297         virtual int WidthChar(Font &font_, char ch)=0;
 298         virtual int Ascent(Font &font_)=0;
 299         virtual int Descent(Font &font_)=0;
 300         virtual int InternalLeading(Font &font_)=0;
 301         virtual int ExternalLeading(Font &font_)=0;
 302         virtual int Height(Font &font_)=0;
 303         virtual int AverageCharWidth(Font &font_)=0;
 304
 305         virtual int SetPalette(Palette *pal, bool inBackGround)=0;
 306         virtual void SetClip(PRectangle rc)=0;
 307         virtual void FlushCachedState()=0;
 308
 309         virtual void SetUnicodeMode(bool unicodeMode_)=0;
 310 };
 311
 312 /**
 313  * A simple callback action passing one piece of untyped user data.
 314  */
 315 typedef void (*CallBackAction)(void*);
 316
 317 /**
 318  * Class to hide the details of window manipulation.
 319  * Does not own the window which will normally have a longer life than this object.
 320  */
 321 class Window {
 322 protected:
 323         WindowID id;
 324 public:
 325         Window() : id(0), cursorLast(cursorInvalid) {}
 326         Window(const Window &source) : id(source.id), cursorLast(cursorInvalid) {}
 327         virtual ~Window();
 328         Window &operator=(WindowID id_) {
 329                 id = id_;
 330                 return *this;
 331         }
 332         WindowID GetID() { return id; }
 333         bool Created() { return id != 0; }
 334         void Destroy();
 335         bool HasFocus();
 336         PRectangle GetPosition();
 337         void SetPosition(PRectangle rc);
 338         void SetPositionRelative(PRectangle rc, Window relativeTo);
 339         PRectangle GetClientPosition();
 340         void Show(bool show=true);
 341         void InvalidateAll();
 342         void InvalidateRectangle(PRectangle rc);
 343         virtual void SetFont(Font &font);
 344         enum Cursor { cursorInvalid, cursorText, cursorArrow, cursorUp, cursorWait, cursorHoriz, cursorVert, cursorReverseArrow };
 345         void SetCursor(Cursor curs);
 346         void SetTitle(const char *s);
 347 private:
 348         Cursor cursorLast;
 349 };
 350
 351 /**
 352  * Listbox management.
 353  */
 354
 355 class ListBox : public Window {
 356 private:
 357 #if PLAT_GTK
 358         WindowID list;
 359         WindowID scroller;
 360         int current;
 361 #endif
 362         int desiredVisibleRows;
 363         unsigned int maxItemCharacters;
 364         unsigned int aveCharWidth;
 365 public:
 366         CallBackAction doubleClickAction;
 367         void *doubleClickActionData;
 368 public:
 369         ListBox();
 370         virtual ~ListBox();
 371         void Create(Window &parent, int ctrlID);
 372         virtual void SetFont(Font &font);
 373         void SetAverageCharWidth(int width);
 374         void SetVisibleRows(int rows);
 375         PRectangle GetDesiredRect();
 376         void Clear();
 377         void Append(char *s);
 378         int Length();
 379         void Select(int n);
 380         int GetSelection();
 381         int Find(const char *prefix);
 382         void GetValue(int n, char *value, int len);
 383         void Sort();
 384         void SetDoubleClickAction(CallBackAction action, void *data) {
 385                 doubleClickAction = action;
 386                 doubleClickActionData = data;
 387         }
 388 };
 389
 390 /**
 391  * Menu management.
 392  */
 393 class Menu {
 394         MenuID id;
 395 public:
 396         Menu();
 397         MenuID GetID() { return id; }
 398         void CreatePopUp();
 399         void Destroy();
 400         void Show(Point pt, Window &w);
 401 };
 402
 403 class ElapsedTime {
 404         long bigBit;
 405         long littleBit;
 406 public:
 407         ElapsedTime();
 408         double Duration(bool reset=false);
 409 };
 410
 411 /**
 412  * Platform class used to retrieve system wide parameters such as double click speed
 413  * and chrome colour. Not a creatable object, more of a module with several functions.
 414  */
 415 class Platform {
 416         // Private so Platform objects can not be copied
 417         Platform(const Platform &) {}
 418         Platform &operator=(const Platform &) { return *this; }
 419 public:
 420         // Should be private because no new Platforms are ever created
 421         // but gcc warns about this
 422         Platform() {}
 423         ~Platform() {}
 424         static ColourDesired Chrome();
 425         static ColourDesired ChromeHighlight();
 426         static const char *DefaultFont();
 427         static int DefaultFontSize();
 428         static unsigned int DoubleClickTime();
 429         static void DebugDisplay(const char *s);
 430         static bool IsKeyDown(int key);
 431         static long SendScintilla(
 432                 WindowID w, unsigned int msg, unsigned long wParam=0, long lParam=0);
 433         static long SendScintillaPointer(
 434                 WindowID w, unsigned int msg, unsigned long wParam=0, void *lParam=0);
 435         static bool IsDBCSLeadByte(int codePage, char ch);
 436
 437         // These are utility functions not really tied to a platform
 438         static int Minimum(int a, int b);
 439         static int Maximum(int a, int b);
 440         // Next three assume 16 bit shorts and 32 bit longs
 441         static long LongFromTwoShorts(short a,short b) {
 442                 return (a) | ((b) << 16);
 443         }
 444         static short HighShortFromLong(long x) {
 445                 return static_cast<short>(x >> 16);
 446         }
 447         static short LowShortFromLong(long x) {
 448                 return static_cast<short>(x & 0xffff);
 449         }
 450         static void DebugPrintf(const char *format, ...);
 451         static bool ShowAssertionPopUps(bool assertionPopUps_);
 452         static void Assert(const char *c, const char *file, int line);
 453         static int Clamp(int val, int minVal, int maxVal);
 454 };
 455
 456 #ifdef  NDEBUG
 457 #define PLATFORM_ASSERT(c) ((void)0)
 458 #else
 459 #define PLATFORM_ASSERT(c) ((c) ? (void)(0) : Platform::Assert(#c, __FILE__, __LINE__))
 460 #endif
 461
 462 // Shut up annoying Visual C++ warnings:
 463 #ifdef _MSC_VER
 464 #pragma warning(disable: 4244 4309 4514 4710)
 465 #endif
 466
 467 #endif