TextblockIterator in own source file.

1 files changed, 219 insertions, 0 deletions

diff --git a/dw/textblock_iterator.cc b/dw/textblock_iterator.cc
new file mode 100644
index 00000000..63720ffb
--- /dev/null
+++ b/dw/textblock_iterator.cc
@@ -0,0 +1,219 @@
+/*
+ * Dillo Widget
+ *
+ * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "textblock.hh"
+#include "../lout/msg.h"
+#include "../lout/misc.hh"
+
+#include <stdio.h>
+#include <math.h>
+
+using namespace lout;
+
+namespace dw {
+
+Textblock::TextblockIterator::TextblockIterator (Textblock *textblock,
+                                                 core::Content::Type mask,
+                                                 bool atEnd):
+   core::Iterator (textblock, mask, atEnd)
+{
+   index = atEnd ? textblock->words->size () : -1;
+   content.type = atEnd ? core::Content::END : core::Content::START;
+}
+
+Textblock::TextblockIterator::TextblockIterator (Textblock *textblock,
+                                                 core::Content::Type mask,
+                                                 int index):
+   core::Iterator (textblock, mask, false)
+{
+   this->index = index;
+
+   if (index < 0)
+      content.type = core::Content::START;
+   else if (index >= textblock->words->size ())
+      content.type = core::Content::END;
+   else
+      content = textblock->words->getRef(index)->content;
+}
+
+object::Object *Textblock::TextblockIterator::clone()
+{
+   return new TextblockIterator ((Textblock*)getWidget(), getMask(), index);
+}
+
+int Textblock::TextblockIterator::compareTo(misc::Comparable *other)
+{
+   return index - ((TextblockIterator*)other)->index;
+}
+
+bool Textblock::TextblockIterator::next ()
+{
+   Textblock *textblock = (Textblock*)getWidget();
+
+   if (content.type == core::Content::END)
+      return false;
+
+   do {
+      index++;
+      if (index >= textblock->words->size ()) {
+         content.type = core::Content::END;
+         return false;
+      }
+   } while ((textblock->words->getRef(index)->content.type & getMask()) == 0);
+
+   content = textblock->words->getRef(index)->content;
+   return true;
+}
+
+bool Textblock::TextblockIterator::prev ()
+{
+   Textblock *textblock = (Textblock*)getWidget();
+
+   if (content.type == core::Content::START)
+      return false;
+
+   do {
+      index--;
+      if (index < 0) {
+         content.type = core::Content::START;
+         return false;
+      }
+   } while ((textblock->words->getRef(index)->content.type & getMask()) == 0);
+
+   content = textblock->words->getRef(index)->content;
+   return true;
+}
+
+void Textblock::TextblockIterator::highlight (int start, int end,
+                                              core::HighlightLayer layer)
+{
+   Textblock *textblock = (Textblock*)getWidget();
+   int index1 = index, index2 = index;
+
+   if (textblock->hlStart[layer].index > textblock->hlEnd[layer].index) {
+      /* nothing is highlighted */
+      textblock->hlStart[layer].index = index;
+      textblock->hlEnd[layer].index = index;
+   }
+
+   if (textblock->hlStart[layer].index >= index) {
+      index2 = textblock->hlStart[layer].index;
+      textblock->hlStart[layer].index = index;
+      textblock->hlStart[layer].nChar = start;
+   }
+
+   if (textblock->hlEnd[layer].index <= index) {
+      index2 = textblock->hlEnd[layer].index;
+      textblock->hlEnd[layer].index = index;
+      textblock->hlEnd[layer].nChar = end;
+   }
+
+   textblock->queueDrawRange (index1, index2);
+}
+
+void Textblock::TextblockIterator::unhighlight (int direction,
+                                                core::HighlightLayer layer)
+{
+   Textblock *textblock = (Textblock*)getWidget();
+   int index1 = index, index2 = index;
+
+   if (textblock->hlStart[layer].index > textblock->hlEnd[layer].index)
+      return;
+
+   if (direction == 0) {
+      index1 = textblock->hlStart[layer].index;
+      index2 = textblock->hlEnd[layer].index;
+      textblock->hlStart[layer].index = 1;
+      textblock->hlEnd[layer].index = 0;
+   } else if (direction > 0 && textblock->hlStart[layer].index <= index) {
+      index1 = textblock->hlStart[layer].index;
+      textblock->hlStart[layer].index = index + 1;
+      textblock->hlStart[layer].nChar = 0;
+   } else if (direction < 0 && textblock->hlEnd[layer].index >= index) {
+      index1 = textblock->hlEnd[layer].index;
+      textblock->hlEnd[layer].index = index - 1;
+      textblock->hlEnd[layer].nChar = INT_MAX;
+   }
+
+   textblock->queueDrawRange (index1, index2);
+}
+
+void Textblock::queueDrawRange (int index1, int index2)
+{
+   int from = misc::min (index1, index2);
+   int to = misc::max (index1, index2);
+
+   from = misc::min (from, words->size () - 1);
+   from = misc::max (from, 0);
+   to = misc::min (to, words->size () - 1);
+   to = misc::max (to, 0);
+
+   int line1idx = findLineOfWord (from);
+   int line2idx = findLineOfWord (to);
+
+   if (line1idx >= 0 && line2idx >= 0) {
+      Line *line1 = lines->getRef (line1idx),
+           *line2 = lines->getRef (line2idx);
+      int y = lineYOffsetWidget (line1) + line1->boxAscent -
+              line1->contentAscent;
+      int h = lineYOffsetWidget (line2) + line2->boxAscent +
+              line2->contentDescent - y;
+
+      queueDrawArea (0, y, allocation.width, h);
+   }
+}
+
+void Textblock::TextblockIterator::getAllocation (int start, int end,
+                                                  core::Allocation *allocation)
+{
+   Textblock *textblock = (Textblock*)getWidget();
+   int lineIndex = textblock->findLineOfWord (index);
+   Line *line = textblock->lines->getRef (lineIndex);
+   Word *word = textblock->words->getRef (index);
+
+   allocation->x =
+      textblock->allocation.x + textblock->lineXOffsetWidget (line);
+
+   for (int i = line->firstWord; i < index; i++) {
+      Word *w = textblock->words->getRef(i);
+      allocation->x += w->size.width + w->effSpace;
+   }
+   if (start > 0 && word->content.type == core::Content::TEXT) {
+      allocation->x += textblock->textWidth (word->content.text, 0, start,
+                                             word->style);
+   }
+   allocation->y = textblock->lineYOffsetCanvas (line) + line->boxAscent -
+                   word->size.ascent;
+
+   allocation->width = word->size.width;
+   if (word->content.type == core::Content::TEXT) {
+      int wordEnd = strlen(word->content.text);
+
+      if (start > 0 || end < wordEnd) {
+         end = misc::min(end, wordEnd); /* end could be INT_MAX */
+         allocation->width =
+            textblock->textWidth (word->content.text, start, end - start,
+                                  word->style);
+      }
+   }
+   allocation->ascent = word->size.ascent;
+   allocation->descent = word->size.descent;
+}
+
+} // namespace dw