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