Campaign selection: Add search functionality

data/gui/window/campaign_dialog.cfg

@@ -195,6 +195,23 @@
 
 								[grid]
 
+									[row]
+										grow_factor = 0
+
+										[column]
+											grow_factor = 1
+											border = "all"
+											border_size = 5
+											horizontal_alignment = "left"
+
+											[text_box]
+												id = "filter_box"
+												definition = "default"
+												{FILTER_TEXT_BOX_HINT}
+											[/text_box]
+										[/column]
+									[/row]
+
 									[row]
 										grow_factor = 1
 

src/gettext.hpp

@@ -83,6 +83,8 @@ namespace translation
 	int icompare(const std::string& s1,const std::string& s2);
 
 	std::string strftime(const std::string& format, const std::tm* time);
+
+	bool ci_search(const std::string& s1, const std::string& s2);
 }
 
 //#define _(String) translation::dsgettext(GETTEXT_DOMAIN,String)

src/gettext_boost.cpp

@@ -229,7 +229,7 @@ namespace
 			}
 
 			generator_.use_ansi_encoding(false);
-			generator_.categories(bl::message_facet | bl::information_facet | bl::collation_facet | bl::formatting_facet);
+			generator_.categories(bl::message_facet | bl::information_facet | bl::collation_facet | bl::formatting_facet | bl::convert_facet);
 			generator_.characters(bl::char_facet);
 			// We cannot have current_locale_ be a non boost-generated locale since it might not supply
 			// the bl::info facet. As soon as we add message paths, update_locale_internal might fail,
@@ -526,4 +526,17 @@ std::string strftime(const std::string& format, const std::tm* time)
 	return dummy.str();
 }
 
+bool ci_search(const std::string& s1, const std::string& s2)
+{
+	std::lock_guard<std::mutex> lock(get_mutex());
+
+	const std::locale& locale = get_manager().get_locale();
+
+	std::string ls1 = bl::to_lower(s1, locale);
+	std::string ls2 = bl::to_lower(s2, locale);
+
+	return std::search(ls1.begin(), ls1.end(),
+					   ls2.begin(), ls2.end()) != ls1.end();
+}
+
 }

src/gui/dialogs/campaign_selection.cpp

@@ -24,6 +24,7 @@
 #include "gui/widgets/multimenu_button.hpp"
 #include "gui/widgets/scroll_label.hpp"
 #include "gui/widgets/settings.hpp"
+#include "gui/widgets/text_box.hpp"
 #include "gui/widgets/toggle_button.hpp"
 #include "gui/widgets/tree_view.hpp"
 #include "gui/widgets/tree_view_node.hpp"
@@ -149,17 +150,28 @@ void campaign_selection::sort_campaigns(window& window, campaign_selection::CAMP
 	tree_view& tree = find_widget<tree_view>(&window, "campaign_tree", false);
 
 	// Remember which campaign was selected...
-	std::string was_selected = tree.selected_item()->id();
-
-	tree.clear();
-
-	for(const auto& level : levels) {
-		add_campaign_to_tree(window, level->data());
+	std::string was_selected;
+	if (!tree.empty()) {
+		was_selected = tree.selected_item()->id();
+		tree.clear();
 	}
 
-	if(!was_selected.empty()) {
+	bool exists_in_filtered_result = false;
+	for(const auto& level : levels) {
+		if (translation::ci_search(level->name(), last_search_text_)) {
+			add_campaign_to_tree(window, level->data());
+
+			if (!exists_in_filtered_result) {
+				exists_in_filtered_result = level->id() == was_selected;
+			}
+		}
+	}
+
+	if(!was_selected.empty() && exists_in_filtered_result) {
 		find_widget<tree_view_node>(&window, was_selected, false).select_node();
 	}
+
+	campaign_selected(window);
 }
 
 void campaign_selection::toggle_sorting_selection(window& window, CAMPAIGN_ORDER order)
@@ -197,8 +209,23 @@ void campaign_selection::toggle_sorting_selection(window& window, CAMPAIGN_ORDER
 	sort_campaigns(window, current_sorting_, currently_sorted_asc_);
 }
 
+void campaign_selection::filter_text_changed(text_box_base* textbox, const std::string& text)
+{
+	if (text == last_search_text_) {
+		return;
+	}
+
+	last_search_text_ = text;
+	window& window = *textbox->get_window();
+	sort_campaigns(window, current_sorting_, currently_sorted_asc_);
+}
+
 void campaign_selection::pre_show(window& window)
 {
+	text_box* filter = find_widget<text_box>(&window, "filter_box", false, true);
+	filter->set_text_changed_callback(
+			std::bind(&campaign_selection::filter_text_changed, this, _1, _2));
+
 	/***** Setup campaign tree. *****/
 	tree_view& tree = find_widget<tree_view>(&window, "campaign_tree", false);
 

src/gui/dialogs/campaign_selection.hpp

@@ -15,6 +15,7 @@
 #pragma once
 
 #include "gui/dialogs/modal_dialog.hpp"
+#include "gui/widgets/text_box_base.hpp"
 
 #include "game_initialization/create_engine.hpp"
 
@@ -74,6 +75,8 @@ private:
 
 	void mod_toggled(window& window);
 
+	void filter_text_changed(text_box_base* textbox, const std::string &text);
+
 	ng::create_engine& engine_;
 
 	/** The chosen campaign. */
@@ -89,6 +92,8 @@ private:
 	CAMPAIGN_ORDER current_sorting_;
 
 	bool currently_sorted_asc_;
+
+	std::string last_search_text_;
 };
 
 } // namespace dialogs