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 "LColor.h"
  22 #include "xftFontLoader.h"
  23 #include "xformsImage.h"
  24 #include "frontends/font_metrics.h"
  25 #include "codeConvert.h"
  26
  27 #include "support/lstrings.h"
  28
  29 #include <boost/scoped_array.hpp>
  30
  31 #include <X11/Xft/Xft.h>
  32
  33 #include <cmath>
  34
  35
  36 GPainter::GPainter(GWorkArea & xwa)
  37         : Painter(), owner_(xwa)
  38 {
  39 }
  40
  41
  42 int GPainter::paperWidth() const
  43 {
  44         return owner_.workWidth();
  45 }
  46
  47
  48 int GPainter::paperHeight() const
  49 {
  50         return owner_.workHeight();
  51 }
  52
  53
  54 void GPainter::setForeground(Glib::RefPtr<Gdk::GC> gc, EnumLColor clr)
  55 {
  56         Gdk::Color * gclr = owner_.getColorHandler().getGdkColor(clr);
  57         gc->set_foreground(*gclr);
  58 }
  59
  60
  61 void GPainter::setLineParam(Glib::RefPtr<Gdk::GC> gc,
  62                             line_style ls, line_width lw)
  63 {
  64         int width;
  65         Gdk::LineStyle style;
  66         switch (lw) {
  67         case Painter::line_thin:
  68                 width = 0;
  69                 break;
  70         case Painter::line_thick:
  71                 width = 2;
  72                 break;
  73         }
  74
  75         switch (ls) {
  76         case Painter::line_solid:
  77                 style = Gdk::LINE_SOLID;
  78                 break;
  79         case Painter::line_onoffdash:
  80                 style = Gdk::LINE_ON_OFF_DASH;
  81                 break;
  82         }
  83         gc->set_line_attributes(width, style,
  84                                 Gdk::CAP_NOT_LAST, Gdk::JOIN_MITER);
  85 }
  86
  87
  88 Painter & GPainter::point(int x, int y, EnumLColor c)
  89 {
  90         setForeground(owner_.getGC(), c);
  91         owner_.getPixmap()->draw_point(owner_.getGC(), x, y);
  92         return *this;
  93 }
  94
  95
  96 Painter & GPainter::line(int x1, int y1,
  97         int x2, int y2,
  98         EnumLColor col,
  99         line_style ls,
 100         line_width lw)
 101 {
 102         setForeground(owner_.getGC(), col);
 103         setLineParam(owner_.getGC(), ls, lw);
 104         owner_.getPixmap()->draw_line(owner_.getGC(), x1, y1, x2, y2);
 105         return *this;
 106 }
 107
 108
 109 Painter & GPainter::lines(int const * xp, int const * yp,
 110         int np,
 111         EnumLColor col,
 112         line_style ls,
 113         line_width lw)
 114 {
 115         setForeground(owner_.getGC(), col);
 116         setLineParam(owner_.getGC(), ls, lw);
 117         std::vector<Gdk::Point> points(np);
 118
 119         for (int i = 0; i < np; ++i) {
 120                 points[i].set_x(xp[i]);
 121                 points[i].set_y(yp[i]);
 122         }
 123         owner_.getPixmap()->draw_lines(owner_.getGC(), points);
 124         return *this;
 125 }
 126
 127
 128 Painter & GPainter::rectangle(int x, int y,
 129         int w, int h,
 130         EnumLColor col,
 131         line_style ls,
 132         line_width lw)
 133 {
 134         setForeground(owner_.getGC(), col);
 135         setLineParam(owner_.getGC(), ls, lw);
 136         owner_.getPixmap()->draw_rectangle(owner_.getGC(), false, x, y, w, h);
 137         return *this;
 138 }
 139
 140
 141 Painter & GPainter::fillRectangle(int x, int y,
 142         int w, int h,
 143         EnumLColor col)
 144 {
 145         setForeground(owner_.getGC(), col);
 146         owner_.getPixmap()->draw_rectangle(owner_.getGC(), true, x, y, w, h);
 147         return *this;
 148 }
 149
 150
 151 Painter & GPainter::fillPolygon(int const * xp, int const * yp,
 152         int np, EnumLColor col)
 153 {
 154         setForeground(owner_.getGC(), col);
 155         std::vector<Gdk::Point> points(np);
 156
 157         for (int i = 0; i < np; ++i) {
 158                 points[i].set_x(xp[i]);
 159                 points[i].set_y(yp[i]);
 160         }
 161         owner_.getPixmap()->draw_polygon(owner_.getGC(), true, points);
 162         return *this;
 163 }
 164
 165
 166 Painter & GPainter::arc(int x, int y,
 167         unsigned int w, unsigned int h,
 168         int a1, int a2, EnumLColor col)
 169 {
 170         setForeground(owner_.getGC(), col);
 171         owner_.getPixmap()->draw_arc(owner_.getGC(),
 172                                      false, x, y, w, h, a1, a2);
 173         return *this;
 174 }
 175
 176
 177 Painter & GPainter::image(int x, int y,
 178         int w, int h,
 179         lyx::graphics::Image const & i)
 180 {
 181         lyx::graphics::xformsImage const & image =
 182                 static_cast<lyx::graphics::xformsImage const &>(i);
 183         Pixmap pixmap = GDK_PIXMAP_XID(owner_.getPixmap()->gobj());
 184         GC gc = GDK_GC_XGC(owner_.getGC()->gobj());
 185         XCopyArea(owner_.getDisplay(), image.getPixmap(), pixmap,
 186                   gc, 0, 0, w, h, x, y);
 187         return *this;
 188 }
 189
 190
 191 Painter & GPainter::text(int x, int y,
 192         string const & s, LyXFont const & f)
 193 {
 194         size_t size = s.length() + 1;
 195         wchar_t * wcs = (wchar_t *) alloca(size * sizeof(wchar_t));
 196         size = mbstowcs(wcs, s.c_str(), size);
 197         return text(x, y, wcs, size, f);
 198 }
 199
 200
 201 Painter & GPainter::text(int x, int y,
 202         char c, LyXFont const & f)
 203 {
 204         char s[2] = { c, '\0' };
 205         return text(x, y, s, 1, f);
 206 }
 207
 208
 209 inline XftFont * getXftFont(LyXFont const & f)
 210 {
 211         return fontLoader.load(f.family(), f.series(),
 212                                f.realShape(), f.size());
 213 }
 214
 215
 216 namespace font_metrics
 217 {
 218
 219 int width(wchar_t const *s, size_t n, LyXFont const & f);
 220
 221 }
 222
 223
 224 Painter & GPainter::text(int x, int y, wchar_t const * s, int ls,
 225                       LyXFont const & f)
 226 {
 227         XftFont * font = getXftFont(f);
 228         XftColor * xftClr = owner_.getColorHandler().
 229                 getXftColor(f.realColor());
 230 //      getXftColor(f.realColor());
 231         XftDraw * draw = owner_.getXftDraw();
 232         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 233                 XftDrawString32(draw, xftClr, font, x, y,
 234                                 wcsToFcChar32StrFast(s), ls);
 235         } else {
 236                 LyXFont smallfont(f);
 237                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 238                 XftFont * fontS = getXftFont(smallfont);
 239                 wchar_t c;
 240                 int tmpx = x;
 241                 for(int i = 0; i < ls; ++i) {
 242                         c = lyx::support::uppercase(s[i]);
 243                         if(c != s[i]) {
 244                                 XftDrawString32(draw, xftClr, fontS, tmpx, y,
 245                                                 wcsToFcChar32StrFast(&c), 1);
 246                                 tmpx += font_metrics::width(c, smallfont);
 247                         } else {
 248                                 XftDrawString32(draw, xftClr, font, tmpx, y,
 249                                                 wcsToFcChar32StrFast(&c), 1);
 250                                 tmpx += font_metrics::width(c, f);
 251                         }
 252                 }
 253         }
 254         if (f.underbar() == LyXFont::ON)
 255                 underline(f, x, y, font_metrics::width(s, ls, f));
 256         return *this;
 257 }
 258
 259
 260 Painter & GPainter::text(int x, int y,
 261         char const * s, size_t ls,
 262         LyXFont const & f)
 263 {
 264         boost::scoped_array<wchar_t> wcs(new wchar_t[ls + 1]);
 265         size_t len;
 266         if (fontLoader.isSpecial(f)) {
 267                 unsigned char const * us =
 268                         reinterpret_cast<unsigned char const *>(s);
 269                 len = ls;
 270                 std::copy(us, us + ls, wcs.get());
 271         } else
 272                 len = mbstowcs(wcs.get(), s, ls + 1);
 273         return text(x, y, wcs.get(), len, f);
 274 }