- Added link color change as visual feedback for a clicked link.

1 files changed, 53 insertions, 0 deletions

diff --git a/dw/textblock.cc b/dw/textblock.cc
index 0ada8027..59080d35 100644
--- a/dw/textblock.cc
+++ b/dw/textblock.cc
@@ -1906,11 +1906,64 @@ void Textblock::flush ()
 
 void Textblock::changeLinkColor (int link, int newColor)
 {
+   int from = -1, to;
+   core::style::StyleAttrs style_attrs;
+   core::style::Style *visited_style;
+
+   //printf("Textblock::changeLinkColor link=%d\n", link);
+
+   /* Find the first and last word of this link (binary search) */
+   int min = 0, max = words->size() - 1, i, d;
+   while (min <= max) {
+      i = (min + max) / 2;
+      for (d = i; d > min && words->getRef(d)->style->x_link == -1; --d);
+      //printf(" changeLinkColor:  min=%d max=%d i=%d d=%d s=%d\n",
+      //       min,max,i,d,i-d);
+      if (words->getRef(d)->style->x_link == -1) {
+         min = i + 1;
+         continue;
+      }
+      /* found a link */
+      if (words->getRef(d)->style->x_link < link) {
+         min = d + 1;
+      } else if (words->getRef(d)->style->x_link > link) {
+         max = d - 1;
+      } else {
+         for (; d > 0 && words->getRef(d-1)->style->x_link == link; --d);
+         from = d;
+         for (; d < max && words->getRef(d+1)->style->x_link == link; ++d);
+         to = d;
+         break;
+      }
+   }
+
+   if (from != -1) {
+      style_attrs = *words->getRef(from)->style;
+      style_attrs.color =
+         core::style::Color::createSimple (layout, newColor);
+      visited_style = core::style::Style::create (layout, &style_attrs);
+      changeWordStyle (from, to, visited_style, false, false);
+      visited_style->unref();
+   }
 }
 
 void Textblock::changeWordStyle (int from, int to, core::style::Style *style,
                                  bool includeFirstSpace, bool includeLastSpace)
 {
+   Word *word;
+   int wordIndex;
+
+   /** \todo handle: includeFirstSpace and includeLastSpace */
+
+   if (from < 0 || to < from || to >= words->size())
+      return;
+   for (wordIndex = from; wordIndex <= to; wordIndex++) {
+      word = words->getRef (wordIndex);
+      word->style->unref();
+      style->ref();
+      word->style = style;
+   }
+   queueDraw();
 }
 
 // ----------------------------------------------------------------------