Usermode/Applications/axwin3_src/WM/renderers/richtext.c

   1 /*
   2  * Acess2 Window Manager v3
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * render/richtext.c
   6  * - Formatted Line Editor
   7  */
   8 #include <common.h>
   9 #include <wm_renderer.h>
  10 #include <richtext_messages.h>
  11 #include <stdio.h>      // sscanf
  12
  13 #define LINES_PER_BLOCK 30
  14
  15 // === TYPES ===
  16 typedef struct sRichText_LineBlock
  17 {
  18         struct sRichText_LineBlock      *Next;
  19          int    FirstLine;
  20         char    *Lines[LINES_PER_BLOCK];
  21 } tRichText_LineBlock;
  22 typedef struct sRichText_Window
  23 {
  24          int    DispLines, DispCols;
  25          int    FirstVisRow, FirstVisCol;
  26          int    nLines, nCols;
  27          int    CursorRow, CursorCol;
  28         tRichText_LineBlock     FirstBlock;
  29         tColour DefaultFG;
  30         tColour DefaultBG;
  31         tFont   *Font;
  32
  33         short   LineHeight;
  34 } tRichText_Window;
  35
  36 // === PROTOTYPES ===
  37  int    Renderer_RichText_Init(void);
  38 tWindow *Renderer_RichText_Create(int Flags);
  39 void    Renderer_RichText_Redraw(tWindow *Window);
  40  int    Renderer_RichText_HandleMessage(tWindow *Target, int Msg, int Len, const void *Data);
  41
  42 // === GLOBALS ===
  43 tWMRenderer     gRenderer_RichText = {
  44         .Name = "RichText",
  45         .CreateWindow   = Renderer_RichText_Create,
  46         .Redraw         = Renderer_RichText_Redraw,
  47         .HandleMessage  = Renderer_RichText_HandleMessage
  48 };
  49
  50 // === CODE ===
  51 int Renderer_RichText_Init(void)
  52 {
  53         WM_RegisterRenderer(&gRenderer_RichText);
  54         return 0;
  55 }
  56
  57 tWindow *Renderer_RichText_Create(int Flags)
  58 {
  59         tRichText_Window        *info;
  60         tWindow *ret = WM_CreateWindowStruct( sizeof(*info) );
  61         if(!ret)        return NULL;
  62         info = ret->RendererInfo;
  63         // Everything starts at zero?
  64         return ret;
  65 }
  66
  67 static inline int Renderer_RichText_RenderText_Act(tWindow *Window, tRichText_Window *info, int X, int Row, const char *Text, int Bytes, tColour FG, tColour BG)
  68 {
  69          int    rwidth;
  70         // TODO: Fill only what is needed
  71         WM_Render_DrawRect(Window, X, Row*info->LineHeight,
  72                 Window->W - X, info->LineHeight,
  73                 BG
  74                 );
  75         rwidth = WM_Render_DrawText(Window,
  76                 X, Row*info->LineHeight,
  77                 Window->W - X, info->LineHeight,
  78                 info->Font, FG,
  79                 Text, Bytes
  80                 );
  81         return rwidth;
  82 }
  83
  84 void Renderer_RichText_RenderText(tWindow *Window, int Line, const char *Text)
  85 {
  86         tRichText_Window        *info = Window->RendererInfo;
  87         tColour fg = info->DefaultFG;
  88         tColour bg = info->DefaultBG;
  89          int    bBold = 0;
  90          int    bULine = 0;
  91          int    bItalic = 0;
  92          int    bRender = 0;
  93          int    curx = 0;
  94         const char      *oldtext = Text;
  95
  96         for( int i = 0; i < info->FirstVisCol + info->DispCols; i ++ )
  97         {
  98                 char    ch, flags;
  99                  int    len;
 100
 101                 if( i == info->FirstVisCol )
 102                         bRender = 1;
 103
 104                 ch = *Text++;
 105                 if( ch == 0 )   break;
 106                 if( ch <=3 && bRender ) {
 107                         // Render previous characters
 108                         curx += Renderer_RichText_RenderText_Act(Window, info, curx, Line,
 109                                 oldtext, Text - oldtext, fg, bg);
 110                         oldtext = Text;
 111                 }
 112                 switch(ch)
 113                 {
 114                 case 1: // FG Select (\1 RRGGBB)
 115                         len = sscanf(Text, "%6x", &fg);
 116                         if( len != 6 ) {
 117                                 // Bad client
 118                         }
 119                         Text += len;
 120                         break ;
 121                 case 2: // BG Select (\2 RRGGBB)
 122                         len = sscanf(Text, "%6x", &bg);
 123                         if( len != 6 ) {
 124                                 // Bad client
 125                         }
 126                         Text += len;
 127                         break ;
 128                 case 3: // Flagset (0,it,uline,bold)
 129                         len = sscanf(Text, "%1x", &flags);
 130                         if( len != 1 ) {
 131                                 // Bad client
 132                         }
 133                         Text += len;
 134                         bItalic = !!(flags & (1 << 2));
 135                         bULine = !!(flags & (1 << 1));
 136                         bBold = !!(flags & (1 << 0));
 137                         break ;
 138                 default: // Any char, nop
 139                         break;
 140                 }
 141         }
 142         curx += Renderer_RichText_RenderText_Act(Window, info, curx, Line, oldtext, Text - oldtext, fg, bg);
 143         WM_Render_DrawRect(Window, curx, Line * info->LineHeight, Window->W - curx, info->LineHeight, info->DefaultBG);
 144 }
 145
 146 void Renderer_RichText_Redraw(tWindow *Window)
 147 {
 148         tRichText_Window        *info = Window->RendererInfo;
 149          int    i;
 150         tRichText_LineBlock     *lines = &info->FirstBlock;
 151
 152         // Locate the first line block
 153         for( i = info->FirstVisRow; i > LINES_PER_BLOCK && lines; i -= LINES_PER_BLOCK )
 154                 lines = lines->Next;
 155
 156         for( i = 0; i < info->DispLines && lines; i ++ )
 157         {
 158                 if( i >= info->nLines - info->FirstVisRow )
 159                         break;
 160                 // TODO: Dirty rectangles?
 161                 WM_Render_DrawRect(Window,
 162                         0, i*info->LineHeight,
 163                         Window->W, info->LineHeight,
 164                         info->DefaultBG
 165                         );
 166                 // TODO: Horizontal scrolling?
 167                 // TODO: Formatting
 168                 //Renderer_RichText_RenderText(Window, i, lines->Lines[i % LINES_PER_BLOCK]);
 169                 WM_Render_DrawText(Window,
 170                         0, i*info->LineHeight,
 171                         Window->W, info->LineHeight,
 172                         info->Font, info->DefaultFG,
 173                         lines->Lines[i % LINES_PER_BLOCK],
 174                         -1);
 175
 176                 if( (i + 1) % LINES_PER_BLOCK == 0 )
 177                         lines = lines->Next;
 178         }
 179         // Clear out i -- info->DispLines
 180         WM_Render_DrawRect(Window,
 181                 0, i*info->LineHeight,
 182                 Window->W, (info->DispLines-i)*info->LineHeight,
 183                 info->DefaultBG
 184                 );
 185 }
 186
 187 int Renderer_RichText_HandleMessage(tWindow *Target, int Msg, int Len, const void *Data)
 188 {
 189         switch(Msg)
 190         {
 191         case MSG_RICHTEXT_SETATTR:
 192                 break;
 193         }
 194         return 0;
 195 }