Partially working text editor

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@99 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/action/value.cpp

@@ -14,6 +14,7 @@
 #include <data/field/color.hpp>
 #include <data/field/image.hpp>
 #include <data/field/symbol.hpp>
+#include <util/tagged_string.hpp>
 
 // ----------------------------------------------------------------------------- : ValueAction
 
@@ -35,16 +36,14 @@ class SimpleValueAction : public ValueAction {
 		swap(static_cast<T&>(*valueP).*member, new_value);
 	}
 	
-	virtual bool merge(const Action* action) {
+	virtual bool merge(const Action& action) {
 		if (!ALLOW_MERGE) return false;
-		if (const SimpleValueAction* sva = dynamic_cast<const SimpleValueAction*>(action)) {
-			if (sva->valueP == valueP) {
+		TYPE_CASE(action, SimpleValueAction) {
+			if (action.valueP == valueP) {
 				// adjacent actions on the same value, discard the other one,
 				// because it only keeps an intermediate value
 				return true;
 			}
-		} else {
-			return false;
 		}
 		return false;
 	}
@@ -60,3 +59,85 @@ ValueAction* value_action(const SymbolValueP& value, const FileName&
 
 
 // ----------------------------------------------------------------------------- : Text
+
+TextValueAction::TextValueAction(const TextValueP& value, size_t start, size_t end, size_t new_end, const Defaultable<String>& new_value, const String& name)
+	: ValueAction(value), new_value(new_value), name(name)
+	, selection_start(start), selection_end(end), new_selection_end(new_end)
+{}
+
+String TextValueAction::getName(bool to_undo) const { return name; }
+
+void TextValueAction::perform(bool to_undo) {
+	swap(value().value, new_value);
+//	if (value().value.age < new_value.age) value().value.age = Age();
+	swap(selection_end, new_selection_end);
+}
+
+bool TextValueAction::merge(const Action& action) {
+	TYPE_CASE(action, TextValueAction) {
+		if (&action.value() == &value() && action.name == name && action.selection_start == selection_end) {
+			// adjacent edits, keep old value of this, it is older
+			selection_end  = action.selection_end;
+			return true;
+		}
+	}
+	return false;
+}
+
+TextValue& TextValueAction::value() const {
+	return static_cast<TextValue&>(*valueP);
+}
+
+
+TextValueAction* toggle_format_action(const TextValueP& value, const String& tag, size_t start, size_t end, const String& action_name) {
+	if (start > end) swap(start, end);
+	String new_value;
+	const String& str = value->value();
+	// Are we inside the tag we are toggling?
+	size_t tagpos = in_tag(str, _("<") + tag, start, end);
+	if (tagpos == String::npos) {
+		// we are not inside this tag, add it
+		new_value =  str.substr(0, start);
+		new_value += _("<") + tag + _(">");
+		new_value += str.substr(start, end - start);
+		new_value += _("</") + tag + _(">");
+		new_value += str.substr(end);
+	} else {
+		// we are inside this tag, _('remove') it
+		new_value =  str.substr(0, start);
+		new_value += _("</") + tag + _(">");
+		new_value += str.substr(start, end - start);
+		new_value += _("<") + tag + _(">");
+		new_value += str.substr(end);
+	}
+	// Build action
+	if (start != end) {
+		// don't simplify if start == end, this way we insert <b></b>, allowing the
+		// user to press Ctrl+B and start typing bold text
+		new_value = simplify_tagged(new_value);
+	}
+	if (value->value() == new_value) {
+		return nullptr; // no changes
+	} else {
+		return new TextValueAction(value, start, end, end, new_value, action_name);
+	}
+}
+
+TextValueAction* typing_action(const TextValueP& value, size_t start, size_t end, const String& replacement, const String& action_name)  {
+	bool reverse = start > end;
+	if (reverse) swap(start, end);
+	String new_value = tagged_substr_replace(value->value(), start, end, replacement);
+	if (value->value() == new_value) {
+		// no change
+		return nullptr;
+	} else {
+//		if (name == _("Backspace")) {
+//			// HACK: put start after end
+		if (reverse) {
+			return new TextValueAction(value, end, start, start+replacement.size(), new_value, action_name);
+		} else {
+			return new TextValueAction(value, start, end, start+replacement.size(), new_value, action_name);
+		}
+	}
+}
+