skincurses.c

These files contain the source code of the "Video Disk Recorder", which is based on the DVB driver

/*
 * skincurses.c: A plugin for the Video Disk Recorder
 *
 * See the README file for copyright information and how to reach the author.
 *
 * $Id: skincurses.c 1.11 2006/09/10 14:23:55 kls Exp $
 */

#include <ncurses.h>
#include <vdr/osd.h>
#include <vdr/plugin.h>
#include <vdr/skins.h>

static const char *VERSION        = "0.0.8";
static const char *DESCRIPTION    = "A text only skin";
static const char *MAINMENUENTRY  = NULL;

// --- cCursesFont -----------------------------------------------------------

class cCursesFont : public cFont {
public:
  cCursesFont(void): cFont(NULL) {}
  virtual int Width(unsigned char c) const { return 1; }
  virtual int Width(const char *s) const { return s ? strlen(s) : 0; }
  virtual int Height(unsigned char c) const { return 1; }
  virtual int Height(const char *s) const { return 1; }
  virtual int Height(void) const { return 1; }
  };

static const cCursesFont Font;

// --- cCursesOsd ------------------------------------------------------------

#define clrBackground   COLOR_BLACK
#define clrTransparent  clrBackground
#define clrBlack        clrBackground
#define clrRed          COLOR_RED
#define clrGreen        COLOR_GREEN
#define clrYellow       COLOR_YELLOW
#define clrBlue         COLOR_BLUE
#define clrMagenta      COLOR_MAGENTA
#define clrCyan         COLOR_CYAN
#define clrWhite        COLOR_WHITE

static int clrMessage[] = {
  clrBlack,
  clrCyan,
  clrBlack,
  clrGreen,
  clrBlack,
  clrYellow,
  clrWhite,
  clrRed
  };

static int OsdWidth = 50;
static int OsdHeight = 20;

class cCursesOsd : public cOsd {
private:
  WINDOW *savedRegion;
  WINDOW *window;
  enum { MaxColorPairs = 16 };
  int colorPairs[MaxColorPairs];
  void SetColor(int colorFg, int colorBg = clrBackground);
public:
  cCursesOsd(int Left, int Top);
  virtual ~cCursesOsd();
  virtual void SaveRegion(int x1, int y1, int x2, int y2);
  virtual void RestoreRegion(void);
  virtual void DrawText(int x, int y, const char *s, tColor ColorFg, tColor ColorBg, const cFont *Font, int Width = 0, int Height = 0, int Alignment = taDefault);
  virtual void DrawRectangle(int x1, int y1, int x2, int y2, tColor Color);
  virtual void Flush(void);
  };

cCursesOsd::cCursesOsd(int Left, int Top)
:cOsd(Left, Top)
{
  savedRegion = NULL;

  memset(colorPairs, 0x00, sizeof(colorPairs));
  start_color();
  leaveok(stdscr, true);

  window = subwin(stdscr, OsdHeight, OsdWidth, 0, 0);
  syncok(window, true);
}

cCursesOsd::~cCursesOsd()
{
  if (window) {
     werase(window);
     Flush();
     delwin(window);
     window = NULL;
     }
}

void cCursesOsd::SetColor(int colorFg, int colorBg)
{
  int color = (colorBg << 16) | colorFg | 0x80000000;
  for (int i = 0; i < MaxColorPairs; i++) {
      if (!colorPairs[i]) {
         colorPairs[i] = color;
         init_pair(i + 1, colorFg, colorBg);
         //XXX??? attron(COLOR_PAIR(WHITE_ON_BLUE));
         wattrset(window, COLOR_PAIR(i + 1));
         break;
         }
      else if (color == colorPairs[i]) {
         wattrset(window, COLOR_PAIR(i + 1));
         break;
         }
      }
}

void cCursesOsd::SaveRegion(int x1, int y1, int x2, int y2)
{
  if (savedRegion) {
     delwin(savedRegion);
     savedRegion = NULL;
     }
  savedRegion = newwin(y2 - y1 + 1, x2 - x1 + 1, y1, x1);
  copywin(window, savedRegion, y1, x1, 0, 0, y2 - y1, x2 - x1, false);
}

void cCursesOsd::RestoreRegion(void)
{
  if (savedRegion) {
     copywin(savedRegion, window, 0, 0, savedRegion->_begy, savedRegion->_begx, savedRegion->_maxy - savedRegion->_begy, savedRegion->_maxx - savedRegion->_begx, false);
     delwin(savedRegion);
     savedRegion = NULL;
     }
}

void cCursesOsd::DrawText(int x, int y, const char *s, tColor ColorFg, tColor ColorBg, const cFont *Font, int Width, int Height, int Alignment)
{
  int w = Font->Width(s);
  int h = Font->Height();
  if (Width || Height) {
     int cw = Width ? Width : w;
     int ch = Height ? Height : h;
     DrawRectangle(x, y, x + cw - 1, y + ch - 1, ColorBg);
     if (Width) {
        if ((Alignment & taLeft) != 0)
           ;
        else if ((Alignment & taRight) != 0) {
           if (w < Width)
              x += Width - w;
           }
        else { // taCentered
           if (w < Width)
              x += (Width - w) / 2;
           }
        }
     if (Height) {
        if ((Alignment & taTop) != 0)
           ;
        else if ((Alignment & taBottom) != 0) {
           if (h < Height)
              y += Height - h;
           }
        else { // taCentered
           if (h < Height)
              y += (Height - h) / 2;
           }
        }
     }
  SetColor(ColorFg, ColorBg);
  wmove(window, y, x); // ncurses wants 'y' before 'x'!
  waddnstr(window, s, OsdWidth - x);
}

void cCursesOsd::DrawRectangle(int x1, int y1, int x2, int y2, tColor Color)
{
  SetColor(Color, Color);
  for (int y = y1; y <= y2; y++) {
      wmove(window, y, x1); // ncurses wants 'y' before 'x'!
      whline(window, ' ', x2 - x1 + 1);
      }
  wsyncup(window); // shouldn't be necessary because of 'syncok()', but w/o it doesn't work
}

void cCursesOsd::Flush(void)
{
  refresh();
}

// --- cSkinCursesDisplayChannel ---------------------------------------------

class cSkinCursesDisplayChannel : public cSkinDisplayChannel {
private:
  cOsd *osd;
  int timeWidth;
  bool message;
public:
  cSkinCursesDisplayChannel(bool WithInfo);
  virtual ~cSkinCursesDisplayChannel();
  virtual void SetChannel(const cChannel *Channel, int Number);
  virtual void SetEvents(const cEvent *Present, const cEvent *Following);
  virtual void SetMessage(eMessageType Type, const char *Text);
  virtual void Flush(void);
  };

cSkinCursesDisplayChannel::cSkinCursesDisplayChannel(bool WithInfo)
{
  int Lines = WithInfo ? 5 : 1;
  message = false;
  osd = new cCursesOsd(0, Setup.ChannelInfoPos ? 0 : OsdHeight - Lines);
  timeWidth = strlen("00:00");
  osd->DrawRectangle(0, 0, OsdWidth - 1, Lines - 1, clrBackground);
}

cSkinCursesDisplayChannel::~cSkinCursesDisplayChannel()
{
  delete osd;
}

void cSkinCursesDisplayChannel::SetChannel(const cChannel *Channel, int Number)
{
  osd->DrawRectangle(0, 0, OsdWidth - 1, 0, clrBackground);
  osd->DrawText(0, 0, ChannelString(Channel, Number), clrWhite, clrBackground, &Font);
}

void cSkinCursesDisplayChannel::SetEvents(const cEvent *Present, const cEvent *Following)
{
  osd->DrawRectangle(0, 1, timeWidth - 1, 4, clrRed);
  osd->DrawRectangle(timeWidth, 1, OsdWidth - 1, 4, clrBackground);
  for (int i = 0; i < 2; i++) {
      const cEvent *e = !i ? Present : Following;
      if (e) {
         osd->DrawText(            0, 2 * i + 1, e->GetTimeString(), clrWhite, clrRed, &Font);
         osd->DrawText(timeWidth + 1, 2 * i + 1, e->Title(), clrCyan, clrBackground, &Font);
         osd->DrawText(timeWidth + 1, 2 * i + 2, e->ShortText(), clrYellow, clrBackground, &Font);
         }
      }
}

void cSkinCursesDisplayChannel::SetMessage(eMessageType Type, const char *Text)
{
  if (Text) {
     osd->SaveRegion(0, 0, OsdWidth - 1, 0);
     osd->DrawText(0, 0, Text, clrMessage[2 * Type], clrMessage[2 * Type + 1], &Font, OsdWidth, 0, taCenter);
     message = true;
     }
  else {
     osd->RestoreRegion();
     message = false;
     }
}

void cSkinCursesDisplayChannel::Flush(void)
{
  if (!message) {
     cString date = DayDateTime();
     osd->DrawText(OsdWidth - strlen(date), 0, date, clrWhite, clrBackground, &Font);
     }
  osd->Flush();
}

// --- cSkinCursesDisplayMenu ------------------------------------------------

class cSkinCursesDisplayMenu : public cSkinDisplayMenu {
private:
  cOsd *osd;
  void SetScrollbar(void);
public:
  cSkinCursesDisplayMenu(void);
  virtual ~cSkinCursesDisplayMenu();
  virtual void Scroll(bool Up, bool Page);
  virtual int MaxItems(void);
  virtual void Clear(void);
  virtual void SetTitle(const char *Title);
  virtual void SetButtons(const char *Red, const char *Green = NULL, const char *Yellow = NULL, const char *Blue = NULL);
  virtual void SetMessage(eMessageType Type, const char *Text);
  virtual void SetItem(const char *Text, int Index, bool Current, bool Selectable);
  virtual void SetEvent(const cEvent *Event);
  virtual void SetRecording(const cRecording *Recording);
  virtual void SetText(const char *Text, bool FixedFont);
  virtual const cFont *GetTextAreaFont(bool FixedFont) const { return &Font; }
  virtual void Flush(void);
  };

cSkinCursesDisplayMenu::cSkinCursesDisplayMenu(void)
{
  osd = new cCursesOsd(0, 0);
  osd->DrawRectangle(0, 0, OsdWidth - 1, OsdHeight - 1, clrBackground);
}

cSkinCursesDisplayMenu::~cSkinCursesDisplayMenu()
{
  delete osd;
}

void cSkinCursesDisplayMenu::SetScrollbar(void)
{
  if (textScroller.CanScroll()) {
     int yt = textScroller.Top();
     int yb = yt + textScroller.Height() - 1;
     int st = yt;
     int sb = yb;
     int tt = st + (sb - st) * textScroller.Offset() / textScroller.Total();
     int tb = tt + (sb - st) * textScroller.Shown() / textScroller.Total();
     int xl = OsdWidth - 1;
     osd->DrawRectangle(xl, st, xl, sb, clrCyan);
     osd->DrawRectangle(xl, tt, xl, tb, clrWhite);
     }
}

void cSkinCursesDisplayMenu::Scroll(bool Up, bool Page)
{
  cSkinDisplayMenu::Scroll(Up, Page);
  SetScrollbar();
}

int cSkinCursesDisplayMenu::MaxItems(void)
{
  return OsdHeight - 4;
}

void cSkinCursesDisplayMenu::Clear(void)
{
  osd->DrawRectangle(0, 1, OsdWidth - 1, OsdHeight - 2, clrBackground);
  textScroller.Reset();
}

void cSkinCursesDisplayMenu::SetTitle(const char *Title)
{
  osd->DrawText(0, 0, Title, clrBlack, clrCyan, &Font, OsdWidth);
}

void cSkinCursesDisplayMenu::SetButtons(const char *Red, const char *Green, const char *Yellow, const char *Blue)
{
  int w = OsdWidth;
  int t0 = 0;
  int t1 = 0 + w / 4;
  int t2 = 0 + w / 2;
  int t3 = w - w / 4;
  int t4 = w;
  int y = OsdHeight - 1;
  osd->DrawText(t0, y, Red,    clrWhite, Red    ? clrRed    : clrBackground, &Font, t1 - t0, 0, taCenter);
  osd->DrawText(t1, y, Green,  clrBlack, Green  ? clrGreen  : clrBackground, &Font, t2 - t1, 0, taCenter);
  osd->DrawText(t2, y, Yellow, clrBlack, Yellow ? clrYellow : clrBackground, &Font, t3 - t2, 0, taCenter);
  osd->DrawText(t3, y, Blue,   clrWhite, Blue   ? clrBlue   : clrBackground, &Font, t4 - t3, 0, taCenter);
}

void cSkinCursesDisplayMenu::SetMessage(eMessageType Type, const char *Text)
{
  if (Text)
     osd->DrawText(0, OsdHeight - 2, Text, clrMessage[2 * Type], clrMessage[2 * Type + 1], &Font, OsdWidth, 0, taCenter);
  else
     osd->DrawRectangle(0, OsdHeight - 2, OsdWidth - 1, OsdHeight - 2, clrBackground);
}

void cSkinCursesDisplayMenu::SetItem(const char *Text, int Index, bool Current, bool Selectable)
{
  int y = 2 + Index;
  int ColorFg, ColorBg;
  if (Current) {
     ColorFg = clrBlack;
     ColorBg = clrCyan;
     }
  else {
     ColorFg = Selectable ? clrWhite : clrCyan;
     ColorBg = clrBackground;
     }
  for (int i = 0; i < MaxTabs; i++) {
      const char *s = GetTabbedText(Text, i);
      if (s) {
         int xt = Tab(i) / 12;// Tab() is in "pixel" - see also skins.c!!!
         osd->DrawText(xt, y, s, ColorFg, ColorBg, &Font, OsdWidth - xt);
         }
      if (!Tab(i + 1))
         break;
      }
  SetEditableWidth(OsdWidth - Tab(1) / 12); // Tab() is in "pixel" - see also skins.c!!!
}

void cSkinCursesDisplayMenu::SetEvent(const cEvent *Event)
{
  if (!Event)
     return;
  int y = 2;
  cTextScroller ts;
  char t[32];
  snprintf(t, sizeof(t), "%s  %s - %s", *Event->GetDateString(), *Event->GetTimeString(), *Event->GetEndTimeString());
  ts.Set(osd, 0, y, OsdWidth, OsdHeight - y - 2, t, &Font, clrYellow, clrBackground);
  if (Event->Vps() && Event->Vps() != Event->StartTime()) {
     char *buffer;
     asprintf(&buffer, " VPS: %s", *Event->GetVpsString());
     osd->DrawText(OsdWidth - strlen(buffer), y, buffer, clrBlack, clrYellow, &Font);
     free(buffer);
     }
  y += ts.Height();
  y += 1;
  ts.Set(osd, 0, y, OsdWidth, OsdHeight - y - 2, Event->Title(), &Font, clrCyan, clrBackground);
  y += ts.Height();
  if (!isempty(Event->ShortText())) {
     ts.Set(osd, 0, y, OsdWidth, OsdHeight - y - 2, Event->ShortText(), &Font, clrYellow, clrBackground);
     y += ts.Height();
     }
  y += 1;
  if (!isempty(Event->Description())) {
     textScroller.Set(osd, 0, y, OsdWidth - 2, OsdHeight - y - 2, Event->Description(), &Font, clrCyan, clrBackground);
     SetScrollbar();
     }
}

void cSkinCursesDisplayMenu::SetRecording(const cRecording *Recording)
{
  if (!Recording)
     return;
  const cRecordingInfo *Info = Recording->Info();