# HG changeset patch
# Parent 395e4c36f097c4cfa2cbe366c77566fdc3faeda1

diff --git a/src/ai/ai.hpp b/src/ai/ai.hpp
--- a/src/ai/ai.hpp
+++ b/src/ai/ai.hpp
@@ -14,6 +14,7 @@
 
 #include "../script/api/script_event_types.hpp"
 #include "../core/string_compare_type.hpp"
+#include "ai_scanner.hpp"
 #include <map>
 
 /** A list that maps AI names to their AIInfo object. */
@@ -140,6 +141,12 @@
 	 * found it is removed from the config.
 	 */
 	static void Rescan();
+
+	/** Gets the ScriptScanner instance that is used to find AIs */
+	static AIScannerInfo *GetScannerInfo();
+	/** Gets the ScriptScanner instance that is used to find AI Libraries */
+	static AIScannerLibrary *GetScannerLibrary();
+
 #if defined(ENABLE_NETWORK)
 	/** Wrapper function for AIScanner::HasAI */
 	static bool HasAI(const struct ContentInfo *ci, bool md5sum);
diff --git a/src/ai/ai_core.cpp b/src/ai/ai_core.cpp
--- a/src/ai/ai_core.cpp
+++ b/src/ai/ai_core.cpp
@@ -352,3 +352,13 @@
 }
 
 #endif /* defined(ENABLE_NETWORK) */
+
+/* static */ AIScannerInfo *AI::GetScannerInfo()
+{
+	return AI::scanner_info;
+}
+/* static */ AIScannerLibrary *AI::GetScannerLibrary()
+{
+	return AI::scanner_library;
+}
+
diff --git a/src/base_media_base.h b/src/base_media_base.h
--- a/src/base_media_base.h
+++ b/src/base_media_base.h
@@ -201,6 +201,8 @@
 		return num + fs.Scan(GetExtension(), BASESET_DIR, Tbase_set::SEARCH_IN_TARS);
 	}
 
+	static Tbase_set *GetAvailableSets();
+
 	static bool SetSet(const char *name);
 	static char *GetSetsList(char *p, const char *last);
 	static int GetNumSets();
@@ -218,6 +220,17 @@
 };
 
 
+/**
+ * Check whether there's a base set matching some information.
+ * @param ci The content info to compare it to.
+ * @param md5sum Should the MD5 checksum be tested as well?
+ * @param s The list with sets.
+ * @return The filename of the first file of the base set, or \c NULL if there is no match.
+ */
+template <class Tbase_set>
+const char *HasBaseSet(const ContentInfo *ci, bool md5sum, const Tbase_set *s);
+
+
 /** Types of graphics in the base graphics set */
 enum GraphicsFileType {
 	GFT_BASE,     ///< Base sprites for all climates
diff --git a/src/base_media_func.h b/src/base_media_func.h
--- a/src/base_media_func.h
+++ b/src/base_media_func.h
@@ -7,7 +7,10 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** @file base_media_func.h Generic function implementations for base data (graphics, sounds). */
+/**
+ * @file base_media_func.h Generic function implementations for base data (graphics, sounds).
+ * @note You should _never_ include this file due to the SET_TYPE define.
+ */
 
 #include "base_media_base.h"
 #include "debug.h"
@@ -274,19 +277,13 @@
 #if defined(ENABLE_NETWORK)
 #include "network/network_content.h"
 
-/**
- * Check whether there's a base set matching some information.
- * @param ci The content info to compare it to.
- * @param md5sum Should the MD5 checksum be tested as well?
- * @param s The list with sets.
- */
-template <class Tbase_set> bool HasBaseSet(const ContentInfo *ci, bool md5sum, const Tbase_set *s)
+template <class Tbase_set> const char *HasBaseSet(const ContentInfo *ci, bool md5sum, const Tbase_set *s)
 {
 	for (; s != NULL; s = s->next) {
 		if (s->GetNumMissing() != 0) continue;
 
 		if (s->shortname != ci->unique_id) continue;
-		if (!md5sum) return true;
+		if (!md5sum) return  s->files[0].filename;
 
 		byte md5[16];
 		memset(md5, 0, sizeof(md5));
@@ -295,22 +292,27 @@
 				md5[j] ^= s->files[i].hash[j];
 			}
 		}
-		if (memcmp(md5, ci->md5sum, sizeof(md5)) == 0) return true;
+		if (memcmp(md5, ci->md5sum, sizeof(md5)) == 0) return s->files[0].filename;
 	}
-
-	return false;
+	return NULL;
 }
 
 template <class Tbase_set>
 /* static */ bool BaseMedia<Tbase_set>::HasSet(const ContentInfo *ci, bool md5sum)
 {
-	return HasBaseSet(ci, md5sum, BaseMedia<Tbase_set>::available_sets) ||
-			HasBaseSet(ci, md5sum, BaseMedia<Tbase_set>::duplicate_sets);
+	return (HasBaseSet(ci, md5sum, BaseMedia<Tbase_set>::available_sets) != NULL) ||
+			(HasBaseSet(ci, md5sum, BaseMedia<Tbase_set>::duplicate_sets) != NULL);
 }
 
 #else
 
 template <class Tbase_set>
+const char *HasBaseSet(const ContentInfo *ci, bool md5sum, const Tbase_set *s)
+{
+	return NULL;
+}
+
+template <class Tbase_set>
 /* static */ bool BaseMedia<Tbase_set>::HasSet(const ContentInfo *ci, bool md5sum)
 {
 	return false;
@@ -375,6 +377,16 @@
 }
 
 /**
+ * Return the available sets.
+ * @return The available sets.
+ */
+template <class Tbase_set>
+/* static */ Tbase_set *BaseMedia<Tbase_set>::GetAvailableSets()
+{
+	return BaseMedia<Tbase_set>::available_sets;
+}
+
+/**
  * Force instantiation of methods so we don't get linker errors.
  * @param repl_type the type of the BaseMedia to instantiate
  * @param set_type  the type of the BaseSet to instantiate
@@ -390,5 +402,6 @@
 	template int repl_type::GetIndexOfUsedSet(); \
 	template const set_type *repl_type::GetSet(int index); \
 	template const set_type *repl_type::GetUsedSet(); \
-	template bool repl_type::DetermineBestSet();
+	template bool repl_type::DetermineBestSet(); \
+	template set_type *repl_type::GetAvailableSets();
 
diff --git a/src/fios.cpp b/src/fios.cpp
--- a/src/fios.cpp
+++ b/src/fios.cpp
@@ -561,8 +561,9 @@
 
 /** Basic data to distinguish a scenario. Used in the server list window */
 struct ScenarioIdentifier {
-	uint32 scenid;    ///< ID for the scenario (generated by content)
-	uint8 md5sum[16]; ///< MD5 checksum of file
+	uint32 scenid;           ///< ID for the scenario (generated by content).
+	uint8 md5sum[16];        ///< MD5 checksum of file.
+	char filename[MAX_PATH]; ///< filename of the file.
 
 	bool operator == (const ScenarioIdentifier &other) const
 	{
@@ -606,6 +607,7 @@
 		int fret = fscanf(f, "%i", &id.scenid);
 		FioFCloseFile(f);
 		if (fret != 1) return false;
+		strecpy(id.filename, filename, lastof(id.filename));
 
 		Md5 checksum;
 		uint8 buffer[1024];
@@ -638,24 +640,34 @@
 static ScenarioScanner _scanner;
 
 /**
- * Check whether we've got a given scenario based on its unique ID.
- * @param ci the content info to compare it to
- * @param md5sum whether to look at the md5sum or the id
- * @return true if we've got the scenario
+ * Find a given scenario based on its unique ID.
+ * @param ci The content info to compare it to.
+ * @param md5sum Whether to look at the md5sum or the id.
+ * @return The filename of the file, else \c NULL.
  */
-bool HasScenario(const ContentInfo *ci, bool md5sum)
+const char *FindScenario(const ContentInfo *ci, bool md5sum)
 {
 	_scanner.Scan(false);
 
 	for (ScenarioIdentifier *id = _scanner.Begin(); id != _scanner.End(); id++) {
-		if (md5sum ?
-				(memcmp(id->md5sum, ci->md5sum, sizeof(id->md5sum)) == 0) :
-				(id->scenid == ci->unique_id)) {
-			return true;
+		if (md5sum ? (memcmp(id->md5sum, ci->md5sum, sizeof(id->md5sum)) == 0)
+		           : (id->scenid == ci->unique_id)) {
+			return id->filename;
 		}
 	}
 
-	return false;
+	return NULL;
+}
+
+/**
+ * Check whether we've got a given scenario based on its unique ID.
+ * @param ci The content info to compare it to.
+ * @param md5sum Whether to look at the md5sum or the id.
+ * @return True iff we've got the scenario.
+ */
+bool HasScenario(const ContentInfo *ci, bool md5sum)
+{
+	return (FindScenario(ci, md5sum) != NULL);
 }
 
 /**
diff --git a/src/fios.h b/src/fios.h
--- a/src/fios.h
+++ b/src/fios.h
@@ -15,6 +15,7 @@
 #include "gfx_type.h"
 #include "company_base.h"
 #include "newgrf_config.h"
+#include "network/core/tcp_content.h"
 
 
 typedef SmallMap<uint, CompanyProperties *> CompanyPropertiesMap;
@@ -180,4 +181,6 @@
 void BuildFileList();
 void SetFiosType(const byte fiostype);
 
+const char *FindScenario(const ContentInfo *ci, bool md5sum);
+
 #endif /* FIOS_H */
diff --git a/src/game/game.hpp b/src/game/game.hpp
--- a/src/game/game.hpp
+++ b/src/game/game.hpp
@@ -13,6 +13,7 @@
 #define GAME_HPP
 
 #include "../core/string_compare_type.hpp"
+#include "game_scanner.hpp"
 #include <map>
 
 /** A list that maps AI names to their AIInfo object. */
@@ -101,6 +102,10 @@
 	static bool HasGame(const struct ContentInfo *ci, bool md5sum);
 	static bool HasGameLibrary(const ContentInfo *ci, bool md5sum);
 #endif
+	/** Gets the ScriptScanner instance that is used to find Game scripts */
+	static GameScannerInfo *GetScannerInfo();
+	/** Gets the ScriptScanner instance that is used to find Game Libraries */
+	static GameScannerLibrary *GetScannerLibrary();
 
 private:
 	static uint frame_counter;                        ///< Tick counter for the Game code.
diff --git a/src/game/game_core.cpp b/src/game/game_core.cpp
--- a/src/game/game_core.cpp
+++ b/src/game/game_core.cpp
@@ -253,3 +253,12 @@
 }
 
 #endif /* defined(ENABLE_NETWORK) */
+
+/* static */ GameScannerInfo *Game::GetScannerInfo()
+{
+	return Game::scanner_info;
+}
+/* static */ GameScannerLibrary *Game::GetScannerLibrary()
+{
+	return Game::scanner_library;
+}
diff --git a/src/network/core/tcp_content.cpp b/src/network/core/tcp_content.cpp
--- a/src/network/core/tcp_content.cpp
+++ b/src/network/core/tcp_content.cpp
@@ -14,6 +14,13 @@
 #ifdef ENABLE_NETWORK
 
 #include "../../stdafx.h"
+#include "../../textfile_gui.h"
+#include "../../fileio_func.h"
+#include "../../newgrf_config.h"
+#include "../../base_media_base.h"
+#include "../../ai/ai.hpp"
+#include "../../game/game.hpp"
+#include "../../fios.h"
 #include "tcp_content.h"
 
 /** Clear everything in the struct */
@@ -86,6 +93,52 @@
 	return this->state < ContentInfo::INVALID && this->type >= CONTENT_TYPE_BEGIN && this->type < CONTENT_TYPE_END;
 }
 
+/**
+ * Search a textfile file next to this file in the content list.
+ * @param type The type of the textfile to search for.
+ * @return The filename for the textfile, \c NULL otherwise.
+ */
+const char *ContentInfo::GetTextfile(TextfileType type) const
+{
+	char filepath[MAX_PATH];
+	switch (this->type) {
+		default: NOT_REACHED();
+		case CONTENT_TYPE_AI:
+			strecpy(filepath, AI::GetScannerInfo()->FindScript(this, (this->md5sum != NULL)), lastof(filepath));
+			debug("misc", "ai filepath: %s", filepath);
+			break;
+		case CONTENT_TYPE_AI_LIBRARY:
+			strecpy(filepath, AI::GetScannerLibrary()->FindScript(this, (this->md5sum != NULL)), lastof(filepath));
+			break;
+		case CONTENT_TYPE_GAME:
+			strecpy(filepath, Game::GetScannerInfo()->FindScript(this, (this->md5sum != NULL)), lastof(filepath));
+			break;
+		case CONTENT_TYPE_GAME_LIBRARY:
+			strecpy(filepath, Game::GetScannerLibrary()->FindScript(this, (this->md5sum != NULL)), lastof(filepath));
+			break;
+		case CONTENT_TYPE_NEWGRF:
+			strecpy(filepath, FindGRFConfig(BSWAP32(this->unique_id), this->md5sum != NULL ? FGCM_EXACT : FGCM_ANY, this->md5sum != NULL ? this->md5sum : NULL)->filename, lastof(filepath));
+			debug("misc", "newgrf filepath: %s", filepath);
+			break;
+		case CONTENT_TYPE_BASE_GRAPHICS:
+			strecpy(filepath, HasBaseSet(this, (this->md5sum != NULL), BaseGraphics::GetAvailableSets()), lastof(filepath));
+			debug("misc", "graphics filepath: %s", filepath);
+			break;
+		case CONTENT_TYPE_BASE_SOUNDS:
+			strecpy(filepath, HasBaseSet(this, (this->md5sum != NULL), BaseSounds::GetAvailableSets()), lastof(filepath));
+			break;
+		case CONTENT_TYPE_BASE_MUSIC:
+			strecpy(filepath, HasBaseSet(this, (this->md5sum != NULL), BaseMusic::GetAvailableSets()), lastof(filepath));
+			break;
+		case CONTENT_TYPE_SCENARIO:
+		case CONTENT_TYPE_HEIGHTMAP:
+			strecpy(filepath, FindScenario(this, (this->md5sum != NULL)), lastof(filepath));
+			debug("misc", "scen filepath: %s", filepath);
+			break;
+	}
+	return ::GetTextfile(type, GetContentInfoSubDir(this->type), filepath);
+}
+
 void NetworkContentSocketHandler::Close()
 {
 	CloseConnection();
diff --git a/src/network/core/tcp_content.h b/src/network/core/tcp_content.h
--- a/src/network/core/tcp_content.h
+++ b/src/network/core/tcp_content.h
@@ -91,6 +91,7 @@
 	size_t Size() const;
 	bool IsSelected() const;
 	bool IsValid() const;
+	const char *GetTextfile(TextfileType type) const;
 };
 
 /** Base socket handler for all Content TCP sockets */
diff --git a/src/network/network_content_gui.cpp b/src/network/network_content_gui.cpp
--- a/src/network/network_content_gui.cpp
+++ b/src/network/network_content_gui.cpp
@@ -22,6 +22,7 @@
 #include "../stringfilter_type.h"
 #include "../querystring_gui.h"
 #include "../core/geometry_func.hpp"
+#include "../textfile_gui.h"
 #include "network_content_gui.h"
 
 
@@ -611,6 +612,13 @@
 
 	virtual void OnClick(Point pt, int widget, int click_count)
 	{
+		if (widget >= WID_NCL_TEXTFILE && widget < WID_NCL_TEXTFILE + TFT_END) {
+			if (this->selected == NULL || this->selected->state != ContentInfo::ALREADY_HERE) return;
+
+			ShowContentTextfileWindow((TextfileType)(widget - WID_NCL_TEXTFILE), this->selected);
+			return;
+		}
+
 		switch (widget) {
 			case WID_NCL_MATRIX: {
 				uint id_v = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_NCL_MATRIX);
@@ -820,6 +828,9 @@
 		this->SetWidgetDisabledState(WID_NCL_SELECT_ALL, !show_select_all);
 		this->SetWidgetDisabledState(WID_NCL_SELECT_UPDATE, !show_select_upgrade);
 		this->SetWidgetDisabledState(WID_NCL_OPEN_URL, this->selected == NULL || StrEmpty(this->selected->url));
+		for (TextfileType tft = TFT_BEGIN; tft < TFT_END; tft++) {
+			this->SetWidgetDisabledState(WID_NCL_TEXTFILE + tft, this->selected == NULL || this->selected->state != ContentInfo::ALREADY_HERE || this->selected->GetTextfile(tft) == NULL);
+		}
 
 		this->GetWidget<NWidgetCore>(WID_NCL_CANCEL)->widget_data = this->filesize_sum == 0 ? STR_AI_SETTINGS_CLOSE : STR_AI_LIST_CANCEL;
 	}
@@ -873,6 +884,11 @@
 			/* Right side. */
 			NWidget(NWID_VERTICAL),
 				NWidget(WWT_PANEL, COLOUR_LIGHT_BLUE, WID_NCL_DETAILS), SetResize(1, 1), SetFill(1, 1), EndContainer(),
+				NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(7, 0, 7),
+					NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NCL_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_README, STR_NULL),
+					NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NCL_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_NULL),
+					NWidget(WWT_PUSHTXTBTN, COLOUR_WHITE, WID_NCL_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_LICENCE, STR_NULL),
+				EndContainer(),
 			EndContainer(),
 		EndContainer(),
 		NWidget(NWID_SPACER), SetMinimalSize(0, 7), SetResize(1, 0),
@@ -940,4 +956,78 @@
 #endif /* WITH_ZLIB */
 }
 
+/** Window for displaying the textfile of an item in the content list. */
+struct ContentTextfileWindow : public TextfileWindow {
+	const ContentInfo *contentinfo; ///< View the textfile of this ContentType.
+	StringID typestring;            ///< The type of the content, as a StringID.
+
+	ContentTextfileWindow(TextfileType file_type, const ContentInfo *c) : TextfileWindow(file_type), contentinfo(c)
+	{
+		this->GetWidget<NWidgetCore>(WID_TF_CAPTION)->SetDataTip(STR_TEXTFILE_README_CAPTION + file_type, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS);
+
+		Subdirectory dir;
+		switch (this->contentinfo->type) {
+			case CONTENT_TYPE_NEWGRF:
+				dir = NEWGRF_DIR;
+				this->typestring = STR_CONTENT_TYPE_NEWGRF;
+				break;
+			case CONTENT_TYPE_BASE_GRAPHICS:
+				this->typestring = STR_CONTENT_TYPE_BASE_GRAPHICS;
+				dir = BASESET_DIR;
+				break;
+			case CONTENT_TYPE_BASE_SOUNDS:
+				this->typestring = STR_CONTENT_TYPE_BASE_SOUNDS;
+				dir = BASESET_DIR;
+				break;
+			case CONTENT_TYPE_BASE_MUSIC:
+				this->typestring = STR_CONTENT_TYPE_BASE_MUSIC;
+				dir = BASESET_DIR;
+				break;
+			case CONTENT_TYPE_AI:
+				this->typestring = STR_CONTENT_TYPE_AI;
+				dir = AI_DIR;
+				break;
+			case CONTENT_TYPE_AI_LIBRARY:
+				this->typestring = STR_CONTENT_TYPE_AI_LIBRARY;
+				dir = AI_LIBRARY_DIR;
+				break;
+			case CONTENT_TYPE_GAME:
+				this->typestring = STR_CONTENT_TYPE_GAME_SCRIPT;
+				dir = GAME_DIR;
+				break;
+			case CONTENT_TYPE_GAME_LIBRARY:
+				this->typestring = STR_CONTENT_TYPE_GS_LIBRARY;
+				dir = GAME_LIBRARY_DIR;
+				break;
+			case CONTENT_TYPE_SCENARIO:
+				this->typestring = STR_CONTENT_TYPE_SCENARIO;
+				dir = SCENARIO_DIR;
+				break;
+			case CONTENT_TYPE_HEIGHTMAP:
+				this->typestring = STR_CONTENT_TYPE_HEIGHTMAP;
+				dir = HEIGHTMAP_DIR;
+				break;
+			default:
+				NOT_REACHED();
+			}
+
+		const char *textfile = this->contentinfo->GetTextfile(file_type);
+		this->LoadTextfile(textfile, dir);
+	}
+
+	/* virtual */ void SetStringParameters(int widget) const
+	{
+		if (widget == WID_TF_CAPTION) {
+			SetDParam(0, this->typestring);
+			SetDParamStr(1, this->contentinfo->name);
+		}
+	}
+};
+
+void ShowContentTextfileWindow(TextfileType file_type, const ContentInfo *c)
+{
+	DeleteWindowByClass(WC_TEXTFILE);
+	new ContentTextfileWindow(file_type, c);
+}
+
 #endif /* ENABLE_NETWORK */
diff --git a/src/network/network_content_gui.h b/src/network/network_content_gui.h
--- a/src/network/network_content_gui.h
+++ b/src/network/network_content_gui.h
@@ -43,4 +43,6 @@
 	virtual void OnDownloadProgress(const ContentInfo *ci, int bytes);
 };
 
+void ShowContentTextfileWindow(TextfileType file_type, const ContentInfo *c);
+
 #endif /* NETWORK_CONTENT_GUI_H */
diff --git a/src/script/script_scanner.cpp b/src/script/script_scanner.cpp
--- a/src/script/script_scanner.cpp
+++ b/src/script/script_scanner.cpp
@@ -271,4 +271,12 @@
 	return false;
 }
 
+const char *ScriptScanner::FindScript(const ContentInfo *ci, bool md5sum)
+{
+	for (ScriptInfoList::iterator it = this->info_list.begin(); it != this->info_list.end(); it++) {
+		if (IsSameScript(ci, md5sum, (*it).second, this->GetDirectory())) return (*it).second->GetMainScript();
+	}
+	return NULL;
+}
+
 #endif /* ENABLE_NETWORK */
diff --git a/src/script/script_scanner.hpp b/src/script/script_scanner.hpp
--- a/src/script/script_scanner.hpp
+++ b/src/script/script_scanner.hpp
@@ -69,6 +69,14 @@
 	 */
 	bool HasScript(const struct ContentInfo *ci, bool md5sum);
 
+	/**
+	 * Find a script of a #ContentInfo
+	 * @param ci The information to compare to.
+	 * @param md5sum Whether to check the MD5 checksum.
+	 * @return A filename of a file of the content, else \c NULL.
+	 */
+	const char *FindScript(const ContentInfo *ci, bool md5sum);
+
 	/* virtual */ bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename);
 
 	/**
diff --git a/src/widgets/network_content_widget.h b/src/widgets/network_content_widget.h
--- a/src/widgets/network_content_widget.h
+++ b/src/widgets/network_content_widget.h
@@ -12,6 +12,8 @@
 #ifndef WIDGETS_NETWORK_CONTENT_WIDGET_H
 #define WIDGETS_NETWORK_CONTENT_WIDGET_H
 
+#include "../textfile_type.h"
+
 /** Widgets of the #NetworkContentDownloadStatusWindow class. */
 enum NetworkContentDownloadStatusWidgets {
 	WID_NCDS_BACKGROUND, ///< Background of the window.
@@ -33,8 +35,9 @@
 	WID_NCL_SCROLLBAR,      ///< Scrollbar of matrix.
 
 	WID_NCL_DETAILS,        ///< Panel with content details.
+	WID_NCL_TEXTFILE,       ///< Open readme, changelog (+1) or license (+2) of a file in the content window.
 
-	WID_NCL_SELECT_ALL,     ///< 'Select all' button.
+	WID_NCL_SELECT_ALL = WID_NCL_TEXTFILE + TFT_END, ///< 'Select all' button.
 	WID_NCL_SELECT_UPDATE,  ///< 'Select updates' button.
 	WID_NCL_UNSELECT,       ///< 'Unselect all' button.
 	WID_NCL_OPEN_URL,       ///< 'Open url' button.