scintilla/Indicator.cxx

   1 // Scintilla source code edit control
   2 /** @file Indicator.cxx
   3  ** Defines the style of indicators which are text decorations such as underlining.
   4  **/
   5 // Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include "Platform.h"
   9
  10 #include "Scintilla.h"
  11 #include "Indicator.h"
  12
  13 #ifdef SCI_NAMESPACE
  14 using namespace Scintilla;
  15 #endif
  16
  17 void Indicator::Draw(Surface *surface, const PRectangle &rc, const PRectangle &rcLine) {
  18         surface->PenColour(fore.allocated);
  19         int ymid = (rc.bottom + rc.top) / 2;
  20         if (style == INDIC_SQUIGGLE) {
  21                 surface->MoveTo(rc.left, rc.top);
  22                 int x = rc.left + 2;
  23                 int y = 2;
  24                 while (x < rc.right) {
  25                         surface->LineTo(x, rc.top + y);
  26                         x += 2;
  27                         y = 2 - y;
  28                 }
  29                 surface->LineTo(rc.right, rc.top + y);  // Finish the line
  30         } else if (style == INDIC_TT) {
  31                 surface->MoveTo(rc.left, ymid);
  32                 int x = rc.left + 5;
  33                 while (x < rc.right) {
  34                         surface->LineTo(x, ymid);
  35                         surface->MoveTo(x-3, ymid);
  36                         surface->LineTo(x-3, ymid+2);
  37                         x++;
  38                         surface->MoveTo(x, ymid);
  39                         x += 5;
  40                 }
  41                 surface->LineTo(rc.right, ymid);        // Finish the line
  42                 if (x - 3 <= rc.right) {
  43                         surface->MoveTo(x-3, ymid);
  44                         surface->LineTo(x-3, ymid+2);
  45                 }
  46         } else if (style == INDIC_DIAGONAL) {
  47                 int x = rc.left;
  48                 while (x < rc.right) {
  49                         surface->MoveTo(x, rc.top+2);
  50                         int endX = x+3;
  51                         int endY = rc.top - 1;
  52                         if (endX > rc.right) {
  53                                 endY += endX - rc.right;
  54                                 endX = rc.right;
  55                         }
  56                         surface->LineTo(endX, endY);
  57                         x += 4;
  58                 }
  59         } else if (style == INDIC_STRIKE) {
  60                 surface->MoveTo(rc.left, rc.top - 4);
  61                 surface->LineTo(rc.right, rc.top - 4);
  62         } else if (style == INDIC_HIDDEN) {
  63                 // Draw nothing
  64         } else if (style == INDIC_BOX) {
  65                 surface->MoveTo(rc.left, ymid+1);
  66                 surface->LineTo(rc.right, ymid+1);
  67                 surface->LineTo(rc.right, rcLine.top+1);
  68                 surface->LineTo(rc.left, rcLine.top+1);
  69                 surface->LineTo(rc.left, ymid+1);
  70         } else if (style == INDIC_ROUNDBOX) {
  71                 PRectangle rcBox = rcLine;
  72                 rcBox.top = rcLine.top + 1;
  73                 rcBox.left = rc.left;
  74                 rcBox.right = rc.right;
  75                 surface->AlphaRectangle(rcBox, 1, fore.allocated, fillAlpha, fore.allocated, 50, 0);
  76         } else {        // Either INDIC_PLAIN or unknown
  77                 surface->MoveTo(rc.left, ymid);
  78                 surface->LineTo(rc.right, ymid);
  79         }
  80 }
  81