# HG changeset patch
# Parent bf4e87c3f8724e5c6b4f184557dfd2840d23cc13

diff --git a/src/fios.cpp b/src/fios.cpp
--- a/src/fios.cpp
+++ b/src/fios.cpp
@@ -648,7 +648,6 @@
 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)) {
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
+{
+	if (this->state == INVALID) return NULL;
+	char filepath[MAX_PATH];
+	const char *tmp;
+	switch (this->type) {
+		default: NOT_REACHED();
+		case CONTENT_TYPE_AI:
+			tmp = AI::GetScannerInfo()->FindMainScript(this, (this->md5sum != NULL));
+			break;
+		case CONTENT_TYPE_AI_LIBRARY:
+			tmp = AI::GetScannerLibrary()->FindMainScript(this, (this->md5sum != NULL));
+			break;
+		case CONTENT_TYPE_GAME:
+			tmp = Game::GetScannerInfo()->FindMainScript(this, (this->md5sum != NULL));
+			break;
+		case CONTENT_TYPE_GAME_LIBRARY:
+			tmp = Game::GetScannerLibrary()->FindMainScript(this, (this->md5sum != NULL));
+			break;
+		case CONTENT_TYPE_NEWGRF:
+			tmp = FindGRFConfig(BSWAP32(this->unique_id), this->md5sum != NULL ? FGCM_EXACT : FGCM_ANY, this->md5sum != NULL ? this->md5sum : NULL)->filename;
+			break;
+		case CONTENT_TYPE_BASE_GRAPHICS:
+			tmp = TryGetBaseSetFile(this, (this->md5sum != NULL), BaseGraphics::GetAvailableSets());
+			break;
+		case CONTENT_TYPE_BASE_SOUNDS:
+			tmp = TryGetBaseSetFile(this, (this->md5sum != NULL), BaseSounds::GetAvailableSets());
+			break;
+		case CONTENT_TYPE_BASE_MUSIC:
+			tmp = TryGetBaseSetFile(this, (this->md5sum != NULL), BaseMusic::GetAvailableSets());
+			break;
+		case CONTENT_TYPE_SCENARIO:
+		case CONTENT_TYPE_HEIGHTMAP:
+			tmp = FindScenario(this, (this->md5sum != NULL));
+			break;
+	}
+	if (tmp == NULL) return NULL;
+	strecpy(filepath, tmp, lastof(filepath));
+	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
@@ -22,12 +22,55 @@
 #include "../stringfilter_type.h"
 #include "../querystring_gui.h"
 #include "../core/geometry_func.hpp"
+#include "../textfile_gui.h"
 #include "network_content_gui.h"
 
 
 #include "table/strings.h"
 #include "../table/sprites.h"
 
+/** Window for displaying the textfile of an item in the content list. */
+struct ContentTextfileWindow : public TextfileWindow {
+	const ContentInfo *ci; ///< View the textfile of this ContentInfo.
+
+	ContentTextfileWindow(TextfileType file_type, const ContentInfo *ci) : TextfileWindow(file_type), ci(ci)
+	{
+		const char *textfile = this->ci->GetTextfile(file_type);
+		this->LoadTextfile(textfile, GetContentInfoSubDir(this->ci->type));
+	}
+
+	StringID GetTypeString() const
+	{
+		switch (this->ci->type) {
+			case CONTENT_TYPE_NEWGRF:        return STR_CONTENT_TYPE_NEWGRF;
+			case CONTENT_TYPE_BASE_GRAPHICS: return STR_CONTENT_TYPE_BASE_GRAPHICS;
+			case CONTENT_TYPE_BASE_SOUNDS:   return STR_CONTENT_TYPE_BASE_SOUNDS;
+			case CONTENT_TYPE_BASE_MUSIC:    return STR_CONTENT_TYPE_BASE_MUSIC;
+			case CONTENT_TYPE_AI:            return STR_CONTENT_TYPE_AI;
+			case CONTENT_TYPE_AI_LIBRARY:    return STR_CONTENT_TYPE_AI_LIBRARY;
+			case CONTENT_TYPE_GAME:          return STR_CONTENT_TYPE_GAME_SCRIPT;
+			case CONTENT_TYPE_GAME_LIBRARY:  return STR_CONTENT_TYPE_GS_LIBRARY;
+			case CONTENT_TYPE_SCENARIO:      return STR_CONTENT_TYPE_SCENARIO;
+			case CONTENT_TYPE_HEIGHTMAP:     return STR_CONTENT_TYPE_HEIGHTMAP;
+			default: NOT_REACHED();
+		}
+	}
+
+	/* virtual */ void SetStringParameters(int widget) const
+	{
+		if (widget == WID_TF_CAPTION) {
+			SetDParam(0, this->GetTypeString());
+			SetDParamStr(1, this->ci->name);
+		}
+	}
+};
+
+void ShowContentTextfileWindow(TextfileType file_type, const ContentInfo *ci)
+{
+	DeleteWindowByClass(WC_TEXTFILE);
+	new ContentTextfileWindow(file_type, ci);
+}
+
 /** Nested widgets for the download window. */
 static const NWidgetPart _nested_network_content_download_status_window_widgets[] = {
 	NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_CONTENT_DOWNLOAD_TITLE, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
@@ -611,6 +654,13 @@
 
 	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 +870,9 @@
 		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 +926,11 @@
 			/* 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),
diff --git a/src/script/api/script_window.hpp b/src/script/api/script_window.hpp
--- a/src/script/api/script_window.hpp
+++ b/src/script/api/script_window.hpp
@@ -1523,6 +1523,7 @@
 		WID_NCL_SELECT_ALL                   = ::WID_NCL_SELECT_ALL,                   ///< 'Select all' button.
 		WID_NCL_SELECT_UPDATE                = ::WID_NCL_SELECT_UPDATE,                ///< 'Select updates' button.
 		WID_NCL_UNSELECT                     = ::WID_NCL_UNSELECT,                     ///< 'Unselect all' button.
+		WID_NCL_TEXTFILE                     = ::WID_NCL_TEXTFILE,                     ///< Open textfile (readme, changelog (+1) or license (+2)) of some content.
 		WID_NCL_OPEN_URL                     = ::WID_NCL_OPEN_URL,                     ///< 'Open url' button.
 		WID_NCL_CANCEL                       = ::WID_NCL_CANCEL,                       ///< 'Cancel' button.
 		WID_NCL_DOWNLOAD                     = ::WID_NCL_DOWNLOAD,                     ///< 'Download' button.
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.