LibraryPage: move PLAY handler code to LibraryTagListPage::HandleEnter()

This completes mouse support for the library page, because now
TagListPage::OnMouse() can call LibraryTagListPage::HandleEnter().

NEWS

@@ -1,6 +1,7 @@
 ncmpc 0.42 - not yet released
 * file page: repaint after moving cursor with mouse
 * file page: handle mouse click on directory
+* library page: mouse support
 * suppor the mouse wheel
 * fix assertion failure on exit
 

src/LibraryPage.cxx

@@ -107,13 +107,23 @@ SongListPage::Update(struct mpdclient &c, unsigned events) noexcept
 	}
 }
 
+class ArtistBrowserPage;
+
 class LibraryTagListPage final : public TagListPage {
+	ArtistBrowserPage &library_page;
+
 public:
-	LibraryTagListPage(ScreenManager &_screen, Page *_parent,
+	LibraryTagListPage(ScreenManager &_screen,
+			   ArtistBrowserPage &_library_page,
+			   Page *_parent,
 			   const enum mpd_tag_type _tag,
 			   const char *_all_text,
 			   WINDOW *_w, Size size) noexcept
-		:TagListPage(_screen, _parent, _tag, _all_text, _w, size) {}
+		:TagListPage(_screen, _parent, _tag, _all_text, _w, size),
+		 library_page(_library_page) {}
+
+protected:
+	bool HandleEnter(struct mpdclient &c) override;
 };
 
 class ArtistBrowserPage final : public ProxyPage {
@@ -131,7 +141,7 @@ class ArtistBrowserPage final : public ProxyPage {
 
 		bool first = true;
 		for (const auto &tag : options.library_page_tags) {
-			tag_list_pages.emplace_back(_screen,
+			tag_list_pages.emplace_back(_screen, *this,
 						    first ? nullptr : this,
 						    tag,
 						    first ? nullptr : _("All"),
@@ -140,6 +150,8 @@ class ArtistBrowserPage final : public ProxyPage {
 		}
 	}
 
+	void EnterTag(struct mpdclient &c, TagFilter &&filter);
+
 private:
 	void OpenTagPage(struct mpdclient &c,
 			 TagFilter &&filter) noexcept;
@@ -260,43 +272,50 @@ ArtistBrowserPage::Update(struct mpdclient &c, unsigned events) noexcept
 	ProxyPage::Update(c, events);
 }
 
-bool
-ArtistBrowserPage::OnCommand(struct mpdclient &c, Command cmd)
+inline void
+ArtistBrowserPage::EnterTag(struct mpdclient &c, TagFilter &&filter)
 {
-	if (ProxyPage::OnCommand(c, cmd))
-		return true;
+	assert(current_tag_list_page != tag_list_pages.end());
 
-	switch (cmd) {
-	case Command::PLAY:
-		if (current_tag_list_page != tag_list_pages.end()) {
-			auto filter = current_tag_list_page->MakeCursorFilter();
-			if (filter.empty())
+	++current_tag_list_page;
+
+	if (current_tag_list_page != tag_list_pages.end()) {
+		while (true) {
+			OpenTagPage(c,  std::move(filter));
+			if (current_tag_list_page->HasMultipleValues())
 				break;
 
+			/* skip tags which have just
+			   one value */
+			filter = current_tag_list_page->GetFilter();
 			++current_tag_list_page;
-
-			if (current_tag_list_page != tag_list_pages.end()) {
-				while (true) {
-					OpenTagPage(c,  std::move(filter));
-					if (current_tag_list_page->HasMultipleValues())
-						break;
-
-					/* skip tags which have just
-					   one value */
-					filter = current_tag_list_page->GetFilter();
-					++current_tag_list_page;
-					if (current_tag_list_page == tag_list_pages.end()) {
-						OpenSongList(c, std::move(filter));
-						break;
-					}
-				}
-			} else
+			if (current_tag_list_page == tag_list_pages.end()) {
 				OpenSongList(c, std::move(filter));
-			return true;
+				break;
+			}
 		}
+	} else
+		OpenSongList(c, std::move(filter));
+}
 
-		break;
+bool
+LibraryTagListPage::HandleEnter(struct mpdclient &c)
+{
+	auto new_filter = MakeCursorFilter();
+	if (new_filter.empty())
+		return TagListPage::HandleEnter(c);
+
+	library_page.EnterTag(c, std::move(new_filter));
+	return true;
+}
 
+bool
+ArtistBrowserPage::OnCommand(struct mpdclient &c, Command cmd)
+{
+	if (ProxyPage::OnCommand(c, cmd))
+		return true;
+
+	switch (cmd) {
 	case Command::GO_ROOT_DIRECTORY:
 		if (GetCurrentPage() != &tag_list_pages.front()) {
 			current_tag_list_page = tag_list_pages.begin();

src/TagListPage.hxx

@@ -95,8 +95,10 @@ public:
 			: nullptr;
 	}
 
+protected:
+	virtual bool HandleEnter(struct mpdclient &c);
+
 private:
-	bool HandleEnter(struct mpdclient &c);
 	bool HandleSelect(struct mpdclient &c);
 
 	void LoadValues(struct mpdclient &c) noexcept;