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symmetric selection handling

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git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@240 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2007-03-25 01:38:09 +00:00
parent 3d98bbb870
commit 0f48513684
1 changed files with 12 additions and 4 deletions
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src/gui/value/text.cpp
+12 -4
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@@ -563,6 +563,13 @@ void TextValueEditor::moveSelectionNoRedraw(IndexType t, size_t new_end, bool al
fixSelection(t, dir);
}
// direction of a with respect to b
Movement direction_of(size_t a, size_t b) {
if (a < b) return MOVE_LEFT_OPT;
if (a > b) return MOVE_RIGHT_OPT;
else return MOVE_MID;
}
void TextValueEditor::fixSelection(IndexType t, Movement dir) {
const String& val = value().value();
// Which type takes precedent?
@@ -571,8 +578,9 @@ void TextValueEditor::fixSelection(IndexType t, Movement dir) {
selection_end = index_to_cursor(value().value(), selection_end_i, dir);
}
// make sure the selection is at a valid position inside the text
selection_start_i = cursor_to_index(val, selection_start, selection_start == selection_end ? MOVE_MID : MOVE_RIGHT_OPT);
selection_end_i = cursor_to_index(val, selection_end, selection_start == selection_end ? MOVE_MID : MOVE_LEFT_OPT);
// prepare to move 'inward' (i.e. from start in the direction of end and vice versa)
selection_start_i = cursor_to_index(val, selection_start, direction_of(selection_end, selection_start));
selection_end_i = cursor_to_index(val, selection_end, direction_of(selection_start, selection_end));
// start and end must be on the same side of separators
size_t seppos = val.find(_("<sep"));
while (seppos != String::npos) {
@@ -580,11 +588,11 @@ void TextValueEditor::fixSelection(IndexType t, Movement dir) {
if (selection_start_i <= seppos && selection_end_i > seppos) {
// not on same side, move selection end before sep
selection_end = index_to_cursor(val, seppos, dir);
selection_end_i = cursor_to_index(val, selection_end, selection_start == selection_end ? MOVE_MID : MOVE_LEFT_OPT);
selection_end_i = cursor_to_index(val, selection_end, direction_of(selection_start, selection_end));
} else if (selection_start_i >= sepend && selection_end_i < sepend) {
// not on same side, move selection end after sep
selection_end = index_to_cursor(val, sepend, dir);
selection_end_i = cursor_to_index(val, selection_end, selection_start == selection_end ? MOVE_MID : MOVE_LEFT_OPT);
selection_end_i = cursor_to_index(val, selection_end, direction_of(selection_start, selection_end));
}
// find next separator
seppos = val.find(_("<sep"), seppos + 1);