Dogcows Code - chaz/openbox/blob - otk/label.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "label.hh"
   6 #include "display.hh"
   7 #include "rendercontrol.hh"
   8
   9 #include <string>
  10
  11 namespace otk {
  12
  13 Label::Label(Widget *parent)
  14   : Widget(parent),
  15     _text(""),
  16     _justify_horz(RenderStyle::LeftTopJustify),
  17     _justify_vert(RenderStyle::LeftTopJustify),
  18     _highlight(false)
  19 {
  20   styleChanged(*RenderStyle::style(screen()));
  21 }
  22
  23 Label::~Label()
  24 {
  25 }
  26
  27 void Label::setHorizontalJustify(RenderStyle::Justify j)
  28 {
  29   _justify_horz = j;
  30   refresh();
  31 }
  32
  33 void Label::setVerticalJustify(RenderStyle::Justify j)
  34 {
  35   _justify_vert = j;
  36   refresh();
  37 }
  38
  39 void Label::setHighlighted(bool h)
  40 {
  41   _highlight = h;
  42   styleChanged(*RenderStyle::style(screen()));
  43   refresh();
  44 }
  45
  46 void Label::setText(const ustring &text)
  47 {
  48   bool utf = text.utf8();
  49   std::string s = text.c_str(); // use a normal string, for its functionality
  50
  51   _parsedtext.clear();
  52   _text = text;
  53
  54   // parse it into multiple lines
  55   std::string::size_type p = 0;
  56   while (p != std::string::npos) {
  57     std::string::size_type p2 = s.find('\n', p);
  58     std::string s(s.substr(p, (p2==std::string::npos?p2:p2-p)));
  59
  60     // turn tabs into spaces (multiples of 8)
  61     std::string::size_type t;
  62     while ((t = s.find('\t')) != std::string::npos)
  63       s.replace(t, 1, std::string(8 - t % 8, ' '));
  64
  65     _parsedtext.push_back(s);
  66     _parsedtext.back().setUtf8(utf);
  67     p = (p2==std::string::npos?p2:p2+1);
  68   }
  69   calcDefaultSizes();
  70 }
  71
  72 void Label::setFont(const Font *f)
  73 {
  74   _font = f;
  75   calcDefaultSizes();
  76 }
  77
  78 void Label::calcDefaultSizes()
  79 {
  80   int longest = 0;
  81   // find the longest line
  82   std::vector<ustring>::iterator it, end = _parsedtext.end();
  83   for (it = _parsedtext.begin(); it != end; ++it) {
  84     int length = _font->measureString(*it);
  85     if (length < 0) continue; // lines too long get skipped
  86     if (length > longest) longest = length;
  87   }
  88   setMinSize(Size(longest + borderWidth() * 2 + bevel() * 4,
  89                   _parsedtext.size() * _font->height() + borderWidth() * 2 +
  90                   bevel() * 2));
  91 }
  92
  93 void Label::styleChanged(const RenderStyle &style)
  94 {
  95   if (_highlight) {
  96     _texture = style.labelFocusBackground();
  97     _forecolor = style.textFocusColor();
  98   } else {
  99     _texture = style.labelUnfocusBackground();
 100     _forecolor = style.textUnfocusColor();
 101   }
 102   if (_font != style.labelFont()) {
 103     _font = style.labelFont();
 104     calcDefaultSizes();
 105   }
 106 }
 107
 108 void Label::renderForeground(Surface &surface)
 109 {
 110   const RenderControl *control = display->renderControl(screen());
 111   int sidemargin = bevel() * 2;
 112   int y = bevel();
 113   int w = area().width() - borderWidth() * 2 - sidemargin * 2;
 114   int h = area().height() - borderWidth() * 2 - bevel() * 2;
 115
 116   switch (_justify_vert) {
 117   case RenderStyle::RightBottomJustify:
 118     y += h - (_parsedtext.size() * _font->height());
 119     if (y < bevel()) y = bevel();
 120     break;
 121   case RenderStyle::CenterJustify:
 122     y += (h - (_parsedtext.size() * _font->height())) / 2;
 123     if (y < bevel()) y = bevel();
 124     break;
 125   case RenderStyle::LeftTopJustify:
 126     break;
 127   }
 128
 129   if (w <= 0) return; // can't fit anything
 130
 131   std::vector<ustring>::iterator it, end = _parsedtext.end();
 132   for (it = _parsedtext.begin(); it != end; ++it, y += _font->height()) {
 133     ustring t = *it; // the actual text to draw
 134     int x = sidemargin;    // x coord for the text
 135
 136     // find a string that will fit inside the area for text
 137     ustring::size_type text_len = t.size();
 138     int length;
 139
 140     do {
 141       t.resize(text_len);
 142       length = _font->measureString(t);
 143     } while (length > w && text_len-- > 0);
 144     if (length < 0) continue; // lines too long get skipped
 145
 146     if (text_len <= 0) continue; // won't fit anything
 147
 148     // justify the text
 149     switch (_justify_horz) {
 150     case RenderStyle::RightBottomJustify:
 151       x += w - length;
 152       break;
 153     case RenderStyle::CenterJustify:
 154       x += (w - length) / 2;
 155       break;
 156     case RenderStyle::LeftTopJustify:
 157       break;
 158     }
 159
 160     control->drawString(surface, *_font, x, y, *_forecolor, t);
 161  }
 162 }
 163
 164 }