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