Improve File Encoding StatusView cell. (Fixes #9653)

* Encoding cell of the StyledEdit StatusView is visible now only in case
  the currently opened file encoding is not equal to default UTF-8 one;
* The Encodings menu that was opened by click on this cell is removed;
* Cmd-Opt-PgDn/PgUp shortcuts are added for quick iteration through the
  list of encodings.

src/apps/stylededit/StatusView.cpp

@@ -26,7 +26,6 @@
 #include <Window.h>
 
 #include "Constants.h"
-#include "StyledEditWindow.h"
 
 
 const float kHorzSpacing = 5.f;
@@ -159,7 +158,8 @@ StatusView::MouseDown(BPoint where)
 	if (!fReadOnly)
 		return;
 
-	if (where.x < fCellWidth[kPositionCell])
+	float left = fCellWidth[kPositionCell] + fCellWidth[kEncodingCell];
+	if (where.x < left)
 		return;
 
 	int32 clicks = 0;
@@ -169,11 +169,7 @@ StatusView::MouseDown(BPoint where)
 			return;
 
 	BPopUpMenu *menu = new BPopUpMenu(B_EMPTY_STRING, false, false);
-	float left = fCellWidth[kPositionCell] + fCellWidth[kEncodingCell];
-	if (where.x < left)
-		StyledEditWindow::PopulateEncodingMenu(menu, fEncoding);
-	else
-		menu->AddItem(new BMenuItem(B_TRANSLATE("Unlock file"),
+	menu->AddItem(new BMenuItem(B_TRANSLATE("Unlock file"),
 					new BMessage(UNLOCK_FILE)));
 	where.x = left;
 	where.y = Bounds().bottom;
@@ -203,7 +199,8 @@ StatusView::SetStatus(BMessage* message)
 			|| fEncoding.Compare("\xff\xff") == 0
 			|| fEncoding.Compare("UTF-8") == 0)
 		{
-			fCellText[kEncodingCell] = "UTF-8";
+			// do not display default UTF-8 encoding
+			fCellText[kEncodingCell].Truncate(0);
 			fEncoding.Truncate(0);
 		} else {
 			const BCharacterSet* charset
@@ -211,7 +208,6 @@ StatusView::SetStatus(BMessage* message)
 			fCellText[kEncodingCell]
 				= charset != NULL ? charset->GetPrintName() : "";
 		}
-		fCellText[kEncodingCell] << " " UTF8_EXPAND_ARROW;
 	}
 
 	bool modified = false;

src/apps/stylededit/StyledEditWindow.cpp

@@ -47,6 +47,7 @@
 #include <TextView.h>
 #include <TranslationUtils.h>
 #include <UnicodeChar.h>
+#include <UTF8.h>
 
 
 using namespace BPrivate;
@@ -1295,7 +1296,7 @@ StyledEditWindow::_InitWindow(uint32 encoding)
 
 	BMessage *message = new BMessage(MENU_RELOAD);
 	message->AddString("encoding", "auto");
-	menu->AddItem(fEncodingItem = new BMenuItem(PopulateEncodingMenu(
+	menu->AddItem(fEncodingItem = new BMenuItem(_PopulateEncodingMenu(
 		new BMenu(B_TRANSLATE("Text encoding")), "UTF-8"),
 		message));
 	fEncodingItem->SetEnabled(false);
@@ -1501,13 +1502,27 @@ StyledEditWindow::_ReloadDocument(BMessage* message)
 			return;
 	}
 
+	const BCharacterSet* charset
+		= BCharacterSetRoster::GetCharacterSetByFontID(
+			fTextView->GetEncoding());
 	const char* forceEncoding = NULL;
 	if (message->FindString("encoding", &forceEncoding) != B_OK) {
-		const BCharacterSet* charset
-			= BCharacterSetRoster::GetCharacterSetByFontID(
-					fTextView->GetEncoding());
 		if (charset != NULL)
 			forceEncoding = charset->GetName();
+	} else {
+		if (charset != NULL) {
+			// UTF8 id assumed equal to -1
+			const uint32 idUTF8 = -1;
+			uint32 id = charset->GetConversionID();
+			if (strcmp(forceEncoding, "next") == 0)
+				id = id == B_MS_WINDOWS_1250_CONVERSION	? idUTF8 : id + 1;
+			else if (strcmp(forceEncoding, "previous") == 0)
+				id = id == idUTF8 ? B_MS_WINDOWS_1250_CONVERSION : id - 1;
+			const BCharacterSet* newCharset
+				= BCharacterSetRoster::GetCharacterSetByConversionID(id);
+			if (newCharset != NULL)
+				forceEncoding = newCharset->GetName();
+		}
 	}
 
 	BScrollBar* vertBar = fScrollView->ScrollBar(B_VERTICAL);
@@ -1888,7 +1903,7 @@ StyledEditWindow::_ShowAlert(const BString& text, const BString& label,
 
 
 BMenu*
-StyledEditWindow::PopulateEncodingMenu(BMenu* menu, const char* currentEncoding)
+StyledEditWindow::_PopulateEncodingMenu(BMenu* menu, const char* currentEncoding)
 {
 	menu->SetRadioMode(true);
 	BString encoding(currentEncoding);
@@ -1919,6 +1934,13 @@ StyledEditWindow::PopulateEncodingMenu(BMenu* menu, const char* currentEncoding)
 	message->AddString("encoding", "auto");
 	menu->AddItem(new BMenuItem(B_TRANSLATE("Autodetect"), message));
 
+	message = new BMessage(MENU_RELOAD);
+	message->AddString("encoding", "next");
+	AddShortcut(B_PAGE_DOWN, B_OPTION_KEY, message);
+	message = new BMessage(MENU_RELOAD);
+	message->AddString("encoding", "previous");
+	AddShortcut(B_PAGE_UP, B_OPTION_KEY, message);
+
 	return menu;
 }
 

src/apps/stylededit/StyledEditWindow.h

@@ -49,8 +49,6 @@ public:
 									bool caseSensitive);
 			bool				IsDocumentEntryRef(const entry_ref* ref);
 
-	static	BMenu*				PopulateEncodingMenu(BMenu* menu,
-									const char* encoding);
 private:
 			void				_InitWindow(uint32 encoding = 0);
 			void				_LoadAttrs();
@@ -79,6 +77,8 @@ private:
 									const BString& label, const BString& label2,
 									const BString& label3,
 									alert_type type) const;
+			BMenu*				_PopulateEncodingMenu(BMenu* menu,
+									const char* encoding);
 
 				// node monitoring helper
 			class _NodeMonitorSuspender {