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 "debug.h"
  16 #include "GWorkArea.h"
  17 #include "lyxrc.h"
  18 #include "encoding.h"
  19 #include "language.h"
  20 #include "LColor.h"
  21 #include "xftFontLoader.h"
  22 #include "xformsImage.h"
  23 #include "frontends/font_metrics.h"
  24 #include "codeConvert.h"
  25
  26 #include "support/lstrings.h"
  27
  28 #include <boost/scoped_array.hpp>
  29
  30 #include <X11/Xft/Xft.h>
  31
  32 #include <cmath>
  33
  34 using std::string;
  35
  36
  37 GPainter::GPainter(GWorkArea & xwa)
  38         : Painter(), owner_(xwa)
  39 {
  40 }
  41
  42
  43 int GPainter::paperWidth() const
  44 {
  45         return owner_.workWidth();
  46 }
  47
  48
  49 int GPainter::paperHeight() const
  50 {
  51         return owner_.workHeight();
  52 }
  53
  54
  55 void GPainter::setForeground(Glib::RefPtr<Gdk::GC> gc, LColor_color clr)
  56 {
  57         Gdk::Color * gclr = owner_.getColorHandler().getGdkColor(clr);
  58         gc->set_foreground(*gclr);
  59 }
  60
  61
  62 void GPainter::setLineParam(Glib::RefPtr<Gdk::GC> gc,
  63                             line_style ls, line_width lw)
  64 {
  65         int width;
  66         Gdk::LineStyle style;
  67         switch (lw) {
  68         case Painter::line_thin:
  69                 width = 0;
  70                 break;
  71         case Painter::line_thick:
  72                 width = 2;
  73                 break;
  74         }
  75
  76         switch (ls) {
  77         case Painter::line_solid:
  78                 style = Gdk::LINE_SOLID;
  79                 break;
  80         case Painter::line_onoffdash:
  81                 style = Gdk::LINE_ON_OFF_DASH;
  82                 break;
  83         }
  84         gc->set_line_attributes(width, style,
  85                                 Gdk::CAP_NOT_LAST, Gdk::JOIN_MITER);
  86 }
  87
  88
  89 Painter & GPainter::point(int x, int y, LColor_color c)
  90 {
  91         setForeground(owner_.getGC(), c);
  92         owner_.getPixmap()->draw_point(owner_.getGC(), x, y);
  93         return *this;
  94 }
  95
  96
  97 Painter & GPainter::line(int x1, int y1,
  98         int x2, int y2,
  99         LColor_color col,
 100         line_style ls,
 101         line_width lw)
 102 {
 103         setForeground(owner_.getGC(), col);
 104         setLineParam(owner_.getGC(), ls, lw);
 105         owner_.getPixmap()->draw_line(owner_.getGC(), x1, y1, x2, y2);
 106         return *this;
 107 }
 108
 109
 110 Painter & GPainter::lines(int const * xp, int const * yp,
 111         int np,
 112         LColor_color col,
 113         line_style ls,
 114         line_width lw)
 115 {
 116         setForeground(owner_.getGC(), col);
 117         setLineParam(owner_.getGC(), ls, lw);
 118         std::vector<Gdk::Point> points(np);
 119
 120         for (int i = 0; i < np; ++i) {
 121                 points[i].set_x(xp[i]);
 122                 points[i].set_y(yp[i]);
 123         }
 124         owner_.getPixmap()->draw_lines(owner_.getGC(), points);
 125         return *this;
 126 }
 127
 128
 129 Painter & GPainter::rectangle(int x, int y,
 130         int w, int h,
 131         LColor_color col,
 132         line_style ls,
 133         line_width lw)
 134 {
 135         setForeground(owner_.getGC(), col);
 136         setLineParam(owner_.getGC(), ls, lw);
 137         owner_.getPixmap()->draw_rectangle(owner_.getGC(), false, x, y, w, h);
 138         return *this;
 139 }
 140
 141
 142 Painter & GPainter::fillRectangle(int x, int y,
 143         int w, int h,
 144         LColor_color col)
 145 {
 146         setForeground(owner_.getGC(), col);
 147         owner_.getPixmap()->draw_rectangle(owner_.getGC(), true, x, y, w, h);
 148         return *this;
 149 }
 150
 151
 152 Painter & GPainter::fillPolygon(int const * xp, int const * yp,
 153         int np, LColor_color col)
 154 {
 155         setForeground(owner_.getGC(), col);
 156         std::vector<Gdk::Point> points(np);
 157
 158         for (int i = 0; i < np; ++i) {
 159                 points[i].set_x(xp[i]);
 160                 points[i].set_y(yp[i]);
 161         }
 162         owner_.getPixmap()->draw_polygon(owner_.getGC(), true, points);
 163         return *this;
 164 }
 165
 166
 167 Painter & GPainter::arc(int x, int y,
 168         unsigned int w, unsigned int h,
 169         int a1, int a2, LColor_color col)
 170 {
 171         setForeground(owner_.getGC(), col);
 172         owner_.getPixmap()->draw_arc(owner_.getGC(),
 173                                      false, x, y, w, h, a1, a2);
 174         return *this;
 175 }
 176
 177
 178 Painter & GPainter::image(int x, int y,
 179         int w, int h,
 180         lyx::graphics::Image const & i)
 181 {
 182         lyx::graphics::xformsImage const & image =
 183                 static_cast<lyx::graphics::xformsImage const &>(i);
 184         Pixmap pixmap = GDK_PIXMAP_XID(owner_.getPixmap()->gobj());
 185         GC gc = GDK_GC_XGC(owner_.getGC()->gobj());
 186         XCopyArea(owner_.getDisplay(), image.getPixmap(), pixmap,
 187                   gc, 0, 0, w, h, x, y);
 188         return *this;
 189 }
 190
 191
 192 Painter & GPainter::text(int x, int y,
 193         std::string const & s, LyXFont const & f)
 194 {
 195         size_t size = s.length() + 1;
 196         wchar_t * wcs = (wchar_t *) alloca(size * sizeof(wchar_t));
 197         size = mbstowcs(wcs, s.c_str(), size);
 198         return text(x, y, wcs, size, f);
 199 }
 200
 201
 202 Painter & GPainter::text(int x, int y,
 203         char c, LyXFont const & f)
 204 {
 205         char s[2] = { c, '\0' };
 206         return text(x, y, s, 1, f);
 207 }
 208
 209
 210 inline XftFont * getXftFont(LyXFont const & f)
 211 {
 212         return fontLoader.load(f.family(), f.series(),
 213                                f.realShape(), f.size());
 214 }
 215
 216
 217 namespace font_metrics
 218 {
 219
 220 int width(wchar_t const *s, size_t n, LyXFont const & f);
 221
 222 }
 223
 224
 225 Painter & GPainter::text(int x, int y, wchar_t const * s, int ls,
 226                       LyXFont const & f)
 227 {
 228         XftFont * font = getXftFont(f);
 229         XftColor * xftClr = owner_.getColorHandler().
 230                 getXftColor(f.realColor());
 231 //      getXftColor(f.realColor());
 232         XftDraw * draw = owner_.getXftDraw();
 233         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 234                 XftDrawString32(draw, xftClr, font, x, y,
 235                                 wcsToXftChar32StrFast(s), ls);
 236         } else {
 237                 LyXFont smallfont(f);
 238                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 239                 XftFont * fontS = getXftFont(smallfont);
 240                 wchar_t c;
 241                 int tmpx = x;
 242                 for(int i = 0; i < ls; ++i) {
 243                         c = lyx::support::uppercase(s[i]);
 244                         if(c != s[i]) {
 245                                 XftDrawString32(draw, xftClr, fontS, tmpx, y,
 246                                                 wcsToXftChar32StrFast(&c), 1);
 247                                 tmpx += font_metrics::width(c, smallfont);
 248                         } else {
 249                                 XftDrawString32(draw, xftClr, font, tmpx, y,
 250                                                 wcsToXftChar32StrFast(&c), 1);
 251                                 tmpx += font_metrics::width(c, f);
 252                         }
 253                 }
 254         }
 255         if (f.underbar() == LyXFont::ON)
 256                 underline(f, x, y, font_metrics::width(s, ls, f));
 257         return *this;
 258 }
 259
 260
 261 Painter & GPainter::text(int x, int y,
 262         char const * s, size_t ls,
 263         LyXFont const & f)
 264 {
 265         boost::scoped_array<wchar_t> wcs(new wchar_t[ls + 1]);
 266         size_t len;
 267         if (fontLoader.isSpecial(f)) {
 268                 unsigned char const * us =
 269                         reinterpret_cast<unsigned char const *>(s);
 270                 len = ls;
 271                 std::copy(us, us + ls, wcs.get());
 272         } else
 273                 len = mbstowcs(wcs.get(), s, ls + 1);
 274         return text(x, y, wcs.get(), len, f);
 275 }