src/insets/InsetLine.cpp

   1 /**
   2  * \file InsetLine.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  * \author Uwe Stöhr
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "InsetLine.h"
  15
  16 #include "Buffer.h"
  17 #include "Dimension.h"
  18 #include "DispatchResult.h"
  19 #include "FuncRequest.h"
  20 #include "FuncStatus.h"
  21 #include "LaTeXFeatures.h"
  22 #include "Length.h"
  23 #include "MetricsInfo.h"
  24 #include "OutputParams.h"
  25 #include "output_xhtml.h"
  26 #include "Text.h"
  27
  28 #include "frontends/FontMetrics.h"
  29 #include "frontends/Painter.h"
  30
  31 #include "support/debug.h"
  32 #include "support/docstream.h"
  33 #include "support/gettext.h"
  34 #include "support/lstrings.h"
  35
  36 #include <cstdlib>
  37
  38 using namespace std;
  39
  40 namespace lyx {
  41
  42 using frontend::Painter;
  43
  44
  45 InsetLine::InsetLine(Buffer * buf, InsetCommandParams const & p)
  46         : InsetCommand(buf, p, "line")
  47 {}
  48
  49
  50 ParamInfo const & InsetLine::findInfo(string const & /* cmdName */)
  51 {
  52         static ParamInfo param_info_;
  53         if (param_info_.empty()) {
  54                 param_info_.add("offset", ParamInfo::LYX_INTERNAL);
  55                 param_info_.add("width", ParamInfo::LYX_INTERNAL);
  56                 param_info_.add("height", ParamInfo::LYX_INTERNAL);
  57         }
  58         return param_info_;
  59 }
  60
  61
  62 docstring InsetLine::screenLabel() const
  63 {
  64         return _("Horizontal line");
  65 }
  66
  67
  68 void InsetLine::doDispatch(Cursor & cur, FuncRequest & cmd)
  69 {
  70         switch (cmd.action()) {
  71
  72         case LFUN_INSET_MODIFY: {
  73                 InsetCommandParams p(LINE_CODE);
  74                 // FIXME UNICODE
  75                 InsetCommand::string2params("line",
  76                         to_utf8(cmd.argument()), p);
  77                 if (p.getCmdName().empty()) {
  78                         cur.noScreenUpdate();
  79                         break;
  80                 }
  81                 setParams(p);
  82                 break;
  83         }
  84
  85         default:
  86                 InsetCommand::doDispatch(cur, cmd);
  87                 break;
  88         }
  89 }
  90
  91
  92 bool InsetLine::getStatus(Cursor & cur, FuncRequest const & cmd,
  93         FuncStatus & status) const
  94 {
  95         switch (cmd.action()) {
  96         case LFUN_INSET_DIALOG_UPDATE:
  97         case LFUN_INSET_MODIFY:
  98                 status.setEnabled(true);
  99                 return true;
 100         default:
 101                 return InsetCommand::getStatus(cur, cmd, status);
 102         }
 103 }
 104
 105
 106 void InsetLine::metrics(MetricsInfo & mi, Dimension & dim) const
 107 {
 108         frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
 109         dim.asc = fm.maxAscent();
 110         dim.des = fm.maxDescent();
 111
 112         Length width = Length(to_ascii(getParam("width")));
 113         int w =
 114                 width.inPixels(mi.base.textwidth,
 115                 fm.width(char_type('M')));
 116
 117         // assure that the line inset is not outside of the window
 118         // check that it doesn't exceed the outer boundary
 119         if (w > mi.base.textwidth)
 120                 w = mi.base.textwidth;
 121
 122         // set a minimal width
 123         int const minw = (w < 0) ? 3 * 8 : 4;
 124         dim.wid = max(minw, max(w, -w));
 125
 126         // Cache the inset dimension
 127         setDimCache(mi, dim);
 128 }
 129
 130
 131 void InsetLine::draw(PainterInfo & pi, int x, int y) const
 132 {
 133         Dimension const dim = dimension(*pi.base.bv);
 134
 135         frontend::FontMetrics const & fm = theFontMetrics(pi.base.font);
 136
 137         // get the length of the parameters in pixels
 138         Length offset = Length(to_ascii(getParam("offset")));
 139         int o =
 140                 offset.inPixels(pi.base.textwidth,
 141                 fm.width(char_type('M')));
 142         Length width = Length(to_ascii(getParam("width")));
 143         int w =
 144                 width.inPixels(pi.base.textwidth,
 145                 fm.width(char_type('M')));
 146         Length height = Length(to_ascii(getParam("height")));
 147         int h =
 148                 height.inPixels(pi.base.textwidth,
 149                 fm.width(char_type('M')));
 150
 151         // get the surrounding text color
 152         FontInfo f = pi.base.font;
 153         Color Line_color = f.realColor();
 154
 155         // assure that the drawn line is not outside of the window
 156         // check that it doesn't exceed the outer boundary
 157         if (x + w - h/2 - 2 > pi.base.textwidth)
 158                 w = pi.base.textwidth - x + h/2 + 2;
 159         // check that it doesn't exceed the upper boundary
 160         if (y - o - h/2 < 0)
 161                 o = y - h/2 - 2;
 162
 163         // the offset is a vertical one
 164         pi.pain.line(x + h/2 + 1, y - o - h/2, x + w - h/2 - 2, y - o - h/2,
 165                 Line_color, Painter::line_solid, float(h));
 166 }
 167
 168
 169 int InsetLine::latex(odocstream & os, OutputParams const &) const
 170 {
 171         bool have_offset = true;
 172         Length offset_len = Length(to_ascii(getParam("offset")));
 173         if (offset_len.value() == 0)
 174                 have_offset = false;
 175
 176         string const offset =
 177                 Length(to_ascii(getParam("offset"))).asLatexString();
 178         string const width =
 179                 Length(to_ascii(getParam("width"))).asLatexString();
 180         string const height =
 181                 Length(to_ascii(getParam("height"))).asLatexString();
 182
 183         os << "\\rule";
 184         // only output the optional parameter if the offset is not 0
 185         if (have_offset)
 186                 os      << "[" << from_ascii(offset) << "]";
 187         os << "{" << from_ascii(width) << "}{" << from_ascii(height) << '}';
 188
 189         return 0;
 190 }
 191
 192
 193 int InsetLine::plaintext(odocstream & os, OutputParams const &) const
 194 {
 195         os << "\n-------------------------------------------\n";
 196         return PLAINTEXT_NEWLINE;
 197 }
 198
 199
 200 int InsetLine::docbook(odocstream & os, OutputParams const &) const
 201 {
 202         os << '\n';
 203         return 0;
 204 }
 205
 206
 207 docstring InsetLine::xhtml(XHTMLStream & xs, OutputParams const &) const
 208 {
 209         xs << html::CompTag("hr");
 210         xs.cr();
 211         return docstring();
 212 }
 213
 214
 215 } // namespace lyx