src/frontends/gtk/GPainter.C

   1 /**
   2  * \file GPainter.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Huang Ying
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12 #include <gtkmm.h>
  13
  14 #include "GPainter.h"
  15 #include "support/std_string.h"
  16 #include "debug.h"
  17 #include "GWorkArea.h"
  18 #include "lyxrc.h"
  19 #include "encoding.h"
  20 #include "language.h"
  21 #include "xftFontLoader.h"
  22 #include "xformsImage.h"
  23 #include "frontends/font_metrics.h"
  24 #include "codeConvert.h"
  25
  26 #include "support/LAssert.h"
  27 #include "support/lstrings.h"
  28
  29 #include <boost/scoped_array.hpp>
  30 #include <X11/Xft/Xft.h>
  31 #include <cmath>
  32
  33
  34 GPainter::GPainter(GWorkArea & xwa)
  35         : Painter(), owner_(xwa)
  36 {
  37 }
  38
  39
  40 int GPainter::paperWidth() const
  41 {
  42         return owner_.workWidth();
  43 }
  44
  45
  46 int GPainter::paperHeight() const
  47 {
  48         return owner_.workHeight();
  49 }
  50
  51
  52 void GPainter::setForeground(Glib::RefPtr<Gdk::GC> gc, LColor::color clr)
  53 {
  54         Gdk::Color * gclr = owner_.getColorHandler().getGdkColor(clr);
  55         gc->set_foreground(*gclr);
  56 }
  57
  58
  59 void GPainter::setLineParam(Glib::RefPtr<Gdk::GC> gc,
  60                             line_style ls, line_width lw)
  61 {
  62         int width;
  63         Gdk::LineStyle style;
  64         switch (lw) {
  65         case Painter::line_thin:
  66                 width = 0;
  67                 break;
  68         case Painter::line_thick:
  69                 width = 2;
  70                 break;
  71         }
  72
  73         switch (ls) {
  74         case Painter::line_solid:
  75                 style = Gdk::LINE_SOLID;
  76                 break;
  77         case Painter::line_onoffdash:
  78                 style = Gdk::LINE_ON_OFF_DASH;
  79                 break;
  80         }
  81         gc->set_line_attributes(width, style,
  82                                 Gdk::CAP_NOT_LAST, Gdk::JOIN_MITER);
  83 }
  84
  85
  86 Painter & GPainter::point(int x, int y, LColor::color c)
  87 {
  88         setForeground(owner_.getGC(), c);
  89         owner_.getPixmap()->draw_point(owner_.getGC(), x, y);
  90         return *this;
  91 }
  92
  93
  94 Painter & GPainter::line(int x1, int y1,
  95         int x2, int y2,
  96         LColor::color col,
  97         line_style ls,
  98         line_width lw)
  99 {
 100         setForeground(owner_.getGC(), col);
 101         setLineParam(owner_.getGC(), ls, lw);
 102         owner_.getPixmap()->draw_line(owner_.getGC(), x1, y1, x2, y2);
 103         return *this;
 104 }
 105
 106
 107 Painter & GPainter::lines(int const * xp, int const * yp,
 108         int np,
 109         LColor::color col,
 110         line_style ls,
 111         line_width lw)
 112 {
 113         setForeground(owner_.getGC(), col);
 114         setLineParam(owner_.getGC(), ls, lw);
 115         std::vector<Gdk::Point> points(np);
 116
 117         for (int i = 0; i < np; ++i) {
 118                 points[i].set_x(xp[i]);
 119                 points[i].set_y(yp[i]);
 120         }
 121         owner_.getPixmap()->draw_lines(owner_.getGC(), points);
 122         return *this;
 123 }
 124
 125
 126 Painter & GPainter::rectangle(int x, int y,
 127         int w, int h,
 128         LColor::color col,
 129         line_style ls,
 130         line_width lw)
 131 {
 132         setForeground(owner_.getGC(), col);
 133         setLineParam(owner_.getGC(), ls, lw);
 134         owner_.getPixmap()->draw_rectangle(owner_.getGC(), false, x, y, w, h);
 135         return *this;
 136 }
 137
 138
 139 Painter & GPainter::fillRectangle(int x, int y,
 140         int w, int h,
 141         LColor::color col)
 142 {
 143         setForeground(owner_.getGC(), col);
 144         owner_.getPixmap()->draw_rectangle(owner_.getGC(), true, x, y, w, h);
 145         return *this;
 146 }
 147
 148
 149 Painter & GPainter::fillPolygon(int const * xp, int const * yp,
 150         int np, LColor::color col)
 151 {
 152         setForeground(owner_.getGC(), col);
 153         std::vector<Gdk::Point> points(np);
 154
 155         for (int i = 0; i < np; ++i) {
 156                 points[i].set_x(xp[i]);
 157                 points[i].set_y(yp[i]);
 158         }
 159         owner_.getPixmap()->draw_polygon(owner_.getGC(), true, points);
 160         return *this;
 161 }
 162
 163
 164 Painter & GPainter::arc(int x, int y,
 165         unsigned int w, unsigned int h,
 166         int a1, int a2, LColor::color col)
 167 {
 168         setForeground(owner_.getGC(), col);
 169         owner_.getPixmap()->draw_arc(owner_.getGC(),
 170                                      false, x, y, w, h, a1, a2);
 171         return *this;
 172 }
 173
 174
 175 Painter & GPainter::image(int x, int y,
 176         int w, int h,
 177         lyx::graphics::Image const & i)
 178 {
 179         lyx::graphics::xformsImage const & image =
 180                 static_cast<lyx::graphics::xformsImage const &>(i);
 181         Pixmap pixmap = GDK_PIXMAP_XID(owner_.getPixmap()->gobj());
 182         GC gc = GDK_GC_XGC(owner_.getGC()->gobj());
 183         XCopyArea(owner_.getDisplay(), image.getPixmap(), pixmap,
 184                   gc, 0, 0, w, h, x, y);
 185         return *this;
 186 }
 187
 188
 189 Painter & GPainter::text(int x, int y,
 190         string const & s, LyXFont const & f)
 191 {
 192         size_t size = s.length() + 1;
 193         wchar_t * wcs = (wchar_t *) alloca(size * sizeof(wchar_t));
 194         size = mbstowcs(wcs, s.c_str(), size);
 195         return text(x, y, wcs, size, f);
 196 }
 197
 198
 199 Painter & GPainter::text(int x, int y,
 200         char c, LyXFont const & f)
 201 {
 202         char s[2] = { c, '\0' };
 203         return text(x, y, s, 1, f);
 204 }
 205
 206
 207 inline XftFont * getXftFont(LyXFont const & f)
 208 {
 209         return fontLoader.load(f.family(), f.series(),
 210                                f.realShape(), f.size());
 211 }
 212
 213
 214 namespace font_metrics
 215 {
 216
 217 int width(wchar_t const *s, size_t n, LyXFont const & f);
 218
 219 }
 220
 221
 222 Painter & GPainter::text(int x, int y, wchar_t const * s, int ls,
 223                       LyXFont const & f)
 224 {
 225         XftFont * font = getXftFont(f);
 226         XftColor * xftClr = owner_.getColorHandler().
 227                 getXftColor(f.realColor());
 228 //      getXftColor(f.realColor());
 229         XftDraw * draw = owner_.getXftDraw();
 230         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 231                 XftDrawString32(draw, xftClr, font, x, y,
 232                                 wcsToFcChar32StrFast(s), ls);
 233         } else {
 234                 LyXFont smallfont(f);
 235                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 236                 XftFont * fontS = getXftFont(smallfont);
 237                 wchar_t c;
 238                 int tmpx = x;
 239                 for(int i = 0; i < ls; ++i) {
 240                         c = lyx::support::uppercase(s[i]);
 241                         if(c != s[i]) {
 242                                 XftDrawString32(draw, xftClr, fontS, tmpx, y,
 243                                                 wcsToFcChar32StrFast(&c), 1);
 244                                 tmpx += font_metrics::width(c, smallfont);
 245                         } else {
 246                                 XftDrawString32(draw, xftClr, font, tmpx, y,
 247                                                 wcsToFcChar32StrFast(&c), 1);
 248                                 tmpx += font_metrics::width(c, f);
 249                         }
 250                 }
 251         }
 252         if (f.underbar() == LyXFont::ON)
 253                 underline(f, x, y, font_metrics::width(s, ls, f));
 254         return *this;
 255 }
 256
 257
 258 Painter & GPainter::text(int x, int y,
 259         char const * s, size_t ls,
 260         LyXFont const & f)
 261 {
 262         boost::scoped_array<wchar_t> wcs(new wchar_t[ls + 1]);
 263         size_t len;
 264         if (fontLoader.isSpecial(f)) {
 265                 unsigned char const * us =
 266                         reinterpret_cast<unsigned char const *>(s);
 267                 len = ls;
 268                 std::copy(us, us + ls, wcs.get());
 269         } else
 270                 len = mbstowcs(wcs.get(), s, ls + 1);
 271         return text(x, y, wcs.get(), len, f);
 272 }