src/frontends/xforms/XPainter.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *          Copyright 1998-2001 The LyX Team
   7  *
   8  *======================================================*/
   9
  10 #include <config.h>
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "frontends/Painter.h"
  17 #include "LString.h"
  18 #include "debug.h"
  19 #include "lyxfont.h"
  20 #include "frontends/xforms/XWorkArea.h"
  21 #include "xfont_metrics.h"
  22 #include "ColorHandler.h"
  23 #include "lyxrc.h"
  24 #include "encoding.h"
  25 #include "language.h"
  26
  27 #include "graphics/GraphicsImage.h"
  28
  29 #include "support/LAssert.h"
  30 #include "support/lstrings.h"
  31
  32 #include <boost/scoped_array.hpp>
  33
  34 #include <cmath>
  35
  36
  37 using std::endl;
  38 using std::max;
  39
  40 namespace {
  41
  42 inline
  43 Display * display()
  44 {
  45         return fl_get_display();
  46 }
  47
  48 }
  49
  50
  51 Painter::Painter(WorkArea & wa)
  52         : PainterBase(wa)
  53 {}
  54
  55
  56 // Basic drawing routines
  57
  58 PainterBase & Painter::point(int x, int y, LColor::color c)
  59 {
  60         XDrawPoint(display(), owner.getPixmap(),
  61                    lyxColorHandler->getGCForeground(c), x, y);
  62         return *this;
  63 }
  64
  65
  66 PainterBase & Painter::line(int x1, int y1, int x2, int y2,
  67                             LColor::color col,
  68                             enum line_style ls,
  69                             enum line_width lw)
  70 {
  71         XDrawLine(display(), owner.getPixmap(),
  72                   lyxColorHandler->getGCLinepars(ls, lw, col),
  73                   x1, y1, x2, y2);
  74         return *this;
  75 }
  76
  77
  78 PainterBase & Painter::lines(int const * xp, int const * yp, int np,
  79                              LColor::color col,
  80                              enum line_style ls,
  81                              enum line_width lw)
  82 {
  83         boost::scoped_array<XPoint> points(new XPoint[np]);
  84
  85         for (int i = 0; i < np; ++i) {
  86                 points[i].x = xp[i];
  87                 points[i].y = yp[i];
  88         }
  89
  90         XDrawLines(display(), owner.getPixmap(),
  91                    lyxColorHandler->getGCLinepars(ls, lw, col),
  92                    points.get(), np, CoordModeOrigin);
  93
  94         return *this;
  95 }
  96
  97
  98 PainterBase & Painter::rectangle(int x, int y, int w, int h,
  99                                  LColor::color col,
 100                                  enum line_style ls,
 101                                  enum line_width lw)
 102 {
 103         XDrawRectangle(display(), owner.getPixmap(),
 104                        lyxColorHandler->getGCLinepars(ls, lw, col),
 105                        x, y, w, h);
 106         return *this;
 107 }
 108
 109
 110 PainterBase & Painter::fillRectangle(int x, int y, int w, int h,
 111                                      LColor::color col)
 112 {
 113         XFillRectangle(display(), owner.getPixmap(),
 114                        lyxColorHandler->getGCForeground(col), x, y, w, h);
 115         return *this;
 116 }
 117
 118
 119 PainterBase & Painter::fillPolygon(int const * xp, int const * yp, int np,
 120                                    LColor::color col)
 121 {
 122         boost::scoped_array<XPoint> points(new XPoint[np]);
 123
 124         for (int i = 0; i < np; ++i) {
 125                 points[i].x = xp[i];
 126                 points[i].y = yp[i];
 127         }
 128
 129         XFillPolygon(display(), owner.getPixmap(),
 130                      lyxColorHandler->getGCForeground(col), points.get(), np,
 131                      Nonconvex, CoordModeOrigin);
 132
 133         return *this;
 134 }
 135
 136
 137 PainterBase & Painter::arc(int x, int y,
 138                            unsigned int w, unsigned int h,
 139                            int a1, int a2, LColor::color col)
 140 {
 141         XDrawArc(display(), owner.getPixmap(),
 142                  lyxColorHandler->getGCForeground(col),
 143                  x, y, w, h, a1, a2);
 144         return *this;
 145 }
 146
 147
 148 /// Draw lines from x1,y1 to x2,y2. They are arrays
 149 PainterBase & Painter::segments(int const * x1, int const * y1,
 150                                 int const * x2, int const * y2, int ns,
 151                                 LColor::color col,
 152                                 enum line_style ls, enum line_width lw)
 153 {
 154         boost::scoped_array<XSegment> s(new XSegment[ns]);
 155
 156         for (int i = 0; i < ns; ++i) {
 157                 s[i].x1 = x1[i];
 158                 s[i].y1 = y1[i];
 159                 s[i].x2 = x2[i];
 160                 s[i].y2 = y2[i];
 161         }
 162         XDrawSegments(display(), owner.getPixmap(),
 163                       lyxColorHandler->getGCLinepars(ls, lw, col),
 164                       s.get(), ns);
 165
 166         return *this;
 167 }
 168
 169
 170 PainterBase & Painter::image(int x, int y, int w, int h,
 171                              grfx::GImage const & image)
 172 {
 173         XGCValues val;
 174         val.function = GXcopy;
 175         GC gc = XCreateGC(display(), owner.getPixmap(),
 176                           GCFunction, &val);
 177         XCopyArea(display(), image.getPixmap(), owner.getPixmap(), gc,
 178                   0, 0, w, h, x, y);
 179         XFreeGC(display(), gc);
 180         return *this;
 181 }
 182
 183
 184 PainterBase & Painter::text(int x, int y, string const & s, LyXFont const & f)
 185 {
 186         return text(x, y, s.data(), s.length(), f);
 187 }
 188
 189
 190 PainterBase & Painter::text(int x, int y, char c, LyXFont const & f)
 191 {
 192         char s[2] = { c, '\0' };
 193         return text(x, y, s, 1, f);
 194 }
 195
 196
 197 PainterBase & Painter::text(int x, int y, char const * s, size_t ls,
 198                             LyXFont const & f)
 199 {
 200         if (lyxrc.font_norm_type == LyXRC::ISO_10646_1) {
 201                 boost::scoped_array<XChar2b> xs(new XChar2b[ls]);
 202                 Encoding const * encoding = f.language()->encoding();
 203                 LyXFont font(f);
 204                 if (f.isSymbolFont()) {
 205 #ifdef USE_UNICODE_FOR_SYMBOLS
 206                         font.setFamily(LyXFont::ROMAN_FAMILY);
 207                         font.setShape(LyXFont::UP_SHAPE);
 208 #endif
 209                         encoding = encodings.symbol_encoding();
 210                 }
 211                 for (size_t i = 0; i < ls; ++i) {
 212                         Uchar c = encoding->ucs(s[i]);
 213                         xs[i].byte1 = c >> 8;
 214                         xs[i].byte2 = c & 0xff;
 215                 }
 216                 text(x , y, xs.get(), ls, font);
 217                 return *this;
 218         }
 219
 220         GC gc = lyxColorHandler->getGCForeground(f.realColor());
 221         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 222                 xfont_metrics::XSetFont(display(), gc, f);
 223                 XDrawString(display(), owner.getPixmap(), gc, x, y, s, ls);
 224         } else {
 225                 LyXFont smallfont(f);
 226                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 227                 int tmpx = x;
 228                 for (size_t i = 0; i < ls; ++i) {
 229                         char const c = uppercase(s[i]);
 230                         if (c != s[i]) {
 231                                 xfont_metrics::XSetFont(display(), gc, smallfont);
 232                                 XDrawString(display(), owner.getPixmap(), gc,
 233                                             tmpx, y, &c, 1);
 234                                 tmpx += xfont_metrics::XTextWidth(smallfont, &c, 1);
 235                         } else {
 236                                 xfont_metrics::XSetFont(display(), gc, f);
 237                                 XDrawString(display(), owner.getPixmap(), gc,
 238                                             tmpx, y, &c, 1);
 239                                 tmpx += xfont_metrics::XTextWidth(f, &c, 1);
 240                         }
 241                 }
 242         }
 243
 244         if (f.underbar() == LyXFont::ON) {
 245                 underline(f, x, y, font_metrics::width(s, ls, f));
 246         }
 247
 248         return *this;
 249 }
 250
 251
 252 PainterBase & Painter::text(int x, int y, XChar2b const * s, int ls,
 253                             LyXFont const & f)
 254 {
 255         GC gc = lyxColorHandler->getGCForeground(f.realColor());
 256         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 257                 xfont_metrics::XSetFont(display(), gc, f);
 258                 XDrawString16(display(), owner.getPixmap(), gc, x, y, s, ls);
 259         } else {
 260                 LyXFont smallfont(f);
 261                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 262                 static XChar2b c;
 263                 int tmpx = x;
 264                 for (int i = 0; i < ls; ++i) {
 265                         if (s[i].byte1)
 266                                 c = s[i];
 267                         else {
 268                                 c.byte1 = s[i].byte1;
 269                                 c.byte2 = uppercase(s[i].byte2);
 270                         }
 271                         if (c.byte2 != s[i].byte2) {
 272                                 xfont_metrics::XSetFont(display(), gc, smallfont);
 273                                 XDrawString16(display(), owner.getPixmap(), gc,
 274                                               tmpx, y, &c, 1);
 275                                 tmpx += xfont_metrics::XTextWidth16(smallfont, &c, 1);
 276                         } else {
 277                                 xfont_metrics::XSetFont(display(), gc, f);
 278                                 XDrawString16(display(), owner.getPixmap(), gc,
 279                                               tmpx, y, &c, 1);
 280                                 tmpx += xfont_metrics::XTextWidth16(f, &c, 1);
 281                         }
 282                 }
 283         }
 284
 285         if (f.underbar() == LyXFont::ON) {
 286                 underline(f, x, y, xfont_metrics::width(s, ls, f));
 287         }
 288
 289         return *this;
 290 }
 291
 292
 293 void Painter::underline(LyXFont const & f, int x, int y, int width)
 294 {
 295         int const below = max(font_metrics::maxDescent(f) / 2, 2);
 296         int const height = max((font_metrics::maxDescent(f) / 4) - 1, 1);
 297         if (height < 2)
 298                 line(x, y + below, x + width, y + below, f.color());
 299         else
 300                 fillRectangle(x, y + below, width, below + height,
 301                               f.color());
 302 }