enriched.c File Reference

Rich text handler. More...

#include "config.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
#include "mutt/lib.h"
#include "email/lib.h"
#include "enriched.h"

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Data Structures
struct	Etags
	Enriched text tags. More...
struct	EnrichedState
	State of enriched-text parser. More...

Macros
#define	INDENT_SIZE   4
	A (not so) minimal implementation of RFC1563.

Enumerations
enum	RichAttribs {   RICH_PARAM = 0 , RICH_BOLD , RICH_UNDERLINE , RICH_ITALIC ,   RICH_NOFILL , RICH_INDENT , RICH_INDENT_RIGHT , RICH_EXCERPT ,   RICH_CENTER , RICH_FLUSHLEFT , RICH_FLUSHRIGHT , RICH_COLOR ,   RICH_MAX }
	Rich text attributes. More...

Functions
static void	enriched_wrap (struct EnrichedState *enriched)
	Wrap enriched text.
static void	enriched_flush (struct EnrichedState *enriched, bool wrap)
	Write enriched text to the State.
static void	enriched_putwc (wchar_t c, struct EnrichedState *enriched)
	Write one wide character to the state.
static void	enriched_puts (const char *s, struct EnrichedState *enriched)
	Write an enriched text string to the State.
static void	enriched_set_flags (const wchar_t *tag, struct EnrichedState *enriched)
	Set flags on the enriched text state.
int	text_enriched_handler (struct Body *b_email, struct State *state)
	Handler for enriched text - Implements handler_t -.

Variables
static const struct Etags	EnrichedTags []
	EnrichedTags - Lookup table of tags allowed in enriched text.

Detailed Description

Rich text handler.

Authors

• Richard Russon

Copyright

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file enriched.c.

Macro Definition Documentation

INDENT_SIZE

#define INDENT_SIZE   4

A (not so) minimal implementation of RFC1563.

Definition at line 43 of file enriched.c.

Enumeration Type Documentation

RichAttribs

enum RichAttribs

Rich text attributes.

Enumerator
RICH_PARAM	Parameter label.
RICH_BOLD	Bold text.
RICH_UNDERLINE	Underlined text.
RICH_ITALIC	Italic text.
RICH_NOFILL	Text will not be reformatted.
RICH_INDENT	Indented text.
RICH_INDENT_RIGHT	Right-indented text.
RICH_EXCERPT	Excerpt text.
RICH_CENTER	Centred text.
RICH_FLUSHLEFT	Left-justified text.
RICH_FLUSHRIGHT	Right-justified text.
RICH_COLOR	Coloured text.
RICH_MAX

Definition at line 48 of file enriched.c.

{
  RICH_PARAM = 0,    
  RICH_BOLD,         
  RICH_UNDERLINE,    
  RICH_ITALIC,       
  RICH_NOFILL,       
  RICH_INDENT,       
  RICH_INDENT_RIGHT, 
  RICH_EXCERPT,      
  RICH_CENTER,       
  RICH_FLUSHLEFT,    
  RICH_FLUSHRIGHT,   
  RICH_COLOR,        
  RICH_MAX,
};

Function Documentation

enriched_wrap()

static void enriched_wrap ( struct EnrichedState *  enriched )

static

Wrap enriched text.

Parameters

enriched

State of enriched text

Definition at line 121 of file enriched.c.

{
  if (!enriched)
    return;
 
  int x;
 
  if (enriched->line_len)
  {
    if (enriched->tag_level[RICH_CENTER] || enriched->tag_level[RICH_FLUSHRIGHT])
    {
      /* Strip trailing white space */
      size_t y = enriched->line_used - 1;
 
      while (y && iswspace(enriched->line[y]))
      {
        enriched->line[y] = (wchar_t) '\0';
        y--;
        enriched->line_used--;
        enriched->line_len--;
      }
      if (enriched->tag_level[RICH_CENTER])
      {
        /* Strip leading whitespace */
        y = 0;
 
        while (enriched->line[y] && iswspace(enriched->line[y]))
          y++;
        if (y)
        {
          for (size_t z = y; z <= enriched->line_used; z++)
          {
            enriched->line[z - y] = enriched->line[z];
          }
 
          enriched->line_len -= y;
          enriched->line_used -= y;
        }
      }
    }
 
    const int extra = enriched->wrap_margin - enriched->line_len - enriched->indent_len -
                      (enriched->tag_level[RICH_INDENT_RIGHT] * INDENT_SIZE);
    if (extra > 0)
    {
      if (enriched->tag_level[RICH_CENTER])
      {
        x = extra / 2;
        while (x)
        {
          state_putc(enriched->state, ' ');
          x--;
        }
      }
      else if (enriched->tag_level[RICH_FLUSHRIGHT])
      {
        x = extra - 1;
        while (x)
        {
          state_putc(enriched->state, ' ');
          x--;
        }
      }
    }
    state_putws(enriched->state, (const wchar_t *) enriched->line);
  }
 
  state_putc(enriched->state, '\n');
  enriched->line[0] = (wchar_t) '\0';
  enriched->line_len = 0;
  enriched->line_used = 0;
  enriched->indent_len = 0;
  if (enriched->state->prefix)
  {
    state_puts(enriched->state, enriched->state->prefix);
    enriched->indent_len += mutt_str_len(enriched->state->prefix);
  }
 
  if (enriched->tag_level[RICH_EXCERPT])
  {
    x = enriched->tag_level[RICH_EXCERPT];
    while (x)
    {
      if (enriched->state->prefix)
      {
        state_puts(enriched->state, enriched->state->prefix);
        enriched->indent_len += mutt_str_len(enriched->state->prefix);
      }
      else
      {
        state_puts(enriched->state, "> ");
        enriched->indent_len += mutt_str_len("> ");
      }
      x--;
    }
  }
  else
  {
    enriched->indent_len = 0;
  }
  if (enriched->tag_level[RICH_INDENT])
  {
    x = enriched->tag_level[RICH_INDENT] * INDENT_SIZE;
    enriched->indent_len += x;
    while (x)
    {
      state_putc(enriched->state, ' ');
      x--;
    }
  }
}

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enriched_flush()

static void enriched_flush ( struct EnrichedState *  enriched, bool  wrap  )

static

Write enriched text to the State.

Parameters

enriched	State of Enriched text
wrap	true if the text should be wrapped

Definition at line 238 of file enriched.c.

{
  if (!enriched || !enriched->buffer)
    return;
 
  if (!enriched->tag_level[RICH_NOFILL] &&
      ((enriched->line_len + enriched->word_len) >
       (enriched->wrap_margin - (enriched->tag_level[RICH_INDENT_RIGHT] * INDENT_SIZE) -
        enriched->indent_len)))
  {
    enriched_wrap(enriched);
  }
 
  if (enriched->buf_used)
  {
    enriched->buffer[enriched->buf_used] = (wchar_t) '\0';
    enriched->line_used += enriched->buf_used;
    if (enriched->line_used > enriched->line_max)
    {
      enriched->line_max = enriched->line_used;
      MUTT_MEM_REALLOC(&enriched->line, enriched->line_max + 1, wchar_t);
    }
    wcscat(enriched->line, enriched->buffer);
    enriched->line_len += enriched->word_len;
    enriched->word_len = 0;
    enriched->buf_used = 0;
  }
  if (wrap)
    enriched_wrap(enriched);
  fflush(enriched->state->fp_out);
}

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enriched_putwc()

static void enriched_putwc ( wchar_t  c, struct EnrichedState *  enriched  )

static

Write one wide character to the state.

Parameters

c	Character to write
enriched	State of Enriched text

Definition at line 275 of file enriched.c.

{
  if (!enriched)
    return;
 
  if (enriched->tag_level[RICH_PARAM])
  {
    if (enriched->tag_level[RICH_COLOR])
    {
      if ((enriched->param_used + 1) >= enriched->param_len)
      {
        enriched->param_len += 256;
        MUTT_MEM_REALLOC(&enriched->param, enriched->param_len, wchar_t);
      }
 
      enriched->param[enriched->param_used++] = c;
    }
    return; /* nothing to do */
  }
 
  /* see if more space is needed (plus extra for possible rich characters) */
  if ((enriched->buf_len < (enriched->buf_used + 3)) || !enriched->buffer)
  {
    enriched->buf_len += 1024;
    MUTT_MEM_REALLOC(&enriched->buffer, enriched->buf_len + 1, wchar_t);
  }
 
  if ((!enriched->tag_level[RICH_NOFILL] && iswspace(c)) || (c == (wchar_t) '\0'))
  {
    if (c == (wchar_t) '\t')
      enriched->word_len += 8 - (enriched->line_len + enriched->word_len) % 8;
    else
      enriched->word_len++;
 
    enriched->buffer[enriched->buf_used++] = c;
    enriched_flush(enriched, false);
  }
  else
  {
    if (enriched->state->flags & STATE_DISPLAY)
    {
      if (enriched->tag_level[RICH_BOLD])
      {
        enriched->buffer[enriched->buf_used++] = c;
        enriched->buffer[enriched->buf_used++] = (wchar_t) '\010'; // Ctrl-H (backspace)
        enriched->buffer[enriched->buf_used++] = c;
      }
      else if (enriched->tag_level[RICH_UNDERLINE])
      {
        enriched->buffer[enriched->buf_used++] = '_';
        enriched->buffer[enriched->buf_used++] = (wchar_t) '\010'; // Ctrl-H (backspace)
        enriched->buffer[enriched->buf_used++] = c;
      }
      else if (enriched->tag_level[RICH_ITALIC])
      {
        enriched->buffer[enriched->buf_used++] = c;
        enriched->buffer[enriched->buf_used++] = (wchar_t) '\010'; // Ctrl-H (backspace)
        enriched->buffer[enriched->buf_used++] = '_';
      }
      else
      {
        enriched->buffer[enriched->buf_used++] = c;
      }
    }
    else
    {
      enriched->buffer[enriched->buf_used++] = c;
    }
    enriched->word_len++;
  }
}

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enriched_puts()

static void enriched_puts ( const char *  s, struct EnrichedState *  enriched  )

static

Write an enriched text string to the State.

Parameters

s	String to write
enriched	State of Enriched text

Definition at line 352 of file enriched.c.

{
  if (!enriched)
    return;
 
  const char *c = NULL;
 
  if ((enriched->buf_len < (enriched->buf_used + mutt_str_len(s))) || !enriched->buffer)
  {
    enriched->buf_len += 1024;
    MUTT_MEM_REALLOC(&enriched->buffer, enriched->buf_len + 1, wchar_t);
  }
  c = s;
  while (*c)
  {
    enriched->buffer[enriched->buf_used++] = (wchar_t) *c;
    c++;
  }
}

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enriched_set_flags()

static void enriched_set_flags ( const wchar_t *  tag, struct EnrichedState *  enriched  )

static

Set flags on the enriched text state.

Parameters

tag	Tag to set
enriched	State of Enriched text

Definition at line 377 of file enriched.c.

{
  if (!enriched)
    return;
 
  const wchar_t *tagptr = tag;
  int i, j;
 
  if (*tagptr == (wchar_t) '/')
    tagptr++;
 
  for (i = 0, j = -1; EnrichedTags[i].tag_name; i++)
  {
    if (wcscasecmp(EnrichedTags[i].tag_name, tagptr) == 0)
    {
      j = EnrichedTags[i].index;
      break;
    }
  }
 
  if (j != -1)
  {
    if ((j == RICH_CENTER) || (j == RICH_FLUSHLEFT) || (j == RICH_FLUSHRIGHT))
      enriched_flush(enriched, true);
 
    if (*tag == (wchar_t) '/')
    {
      if (enriched->tag_level[j]) /* make sure not to go negative */
        enriched->tag_level[j]--;
      if ((enriched->state->flags & STATE_DISPLAY) && (j == RICH_PARAM) &&
          enriched->tag_level[RICH_COLOR])
      {
        enriched->param[enriched->param_used] = (wchar_t) '\0';
        if (wcscasecmp(L"black", enriched->param) == 0)
        {
          enriched_puts("\033[30m", enriched); // Escape
        }
        else if (wcscasecmp(L"red", enriched->param) == 0)
        {
          enriched_puts("\033[31m", enriched); // Escape
        }
        else if (wcscasecmp(L"green", enriched->param) == 0)
        {
          enriched_puts("\033[32m", enriched); // Escape
        }
        else if (wcscasecmp(L"yellow", enriched->param) == 0)
        {
          enriched_puts("\033[33m", enriched); // Escape
        }
        else if (wcscasecmp(L"blue", enriched->param) == 0)
        {
          enriched_puts("\033[34m", enriched); // Escape
        }
        else if (wcscasecmp(L"magenta", enriched->param) == 0)
        {
          enriched_puts("\033[35m", enriched); // Escape
        }
        else if (wcscasecmp(L"cyan", enriched->param) == 0)
        {
          enriched_puts("\033[36m", enriched); // Escape
        }
        else if (wcscasecmp(L"white", enriched->param) == 0)
        {
          enriched_puts("\033[37m", enriched); // Escape
        }
      }
      if ((enriched->state->flags & STATE_DISPLAY) && (j == RICH_COLOR))
      {
        enriched_puts("\033[0m", enriched); // Escape
      }
 
      /* flush parameter buffer when closing the tag */
      if (j == RICH_PARAM)
      {
        enriched->param_used = 0;
        enriched->param[0] = (wchar_t) '\0';
      }
    }
    else
    {
      enriched->tag_level[j]++;
    }
 
    if (j == RICH_EXCERPT)
      enriched_flush(enriched, true);
  }
}

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Variable Documentation

EnrichedTags

const struct Etags EnrichedTags[]

static

Initial value:

= {
  
  { L"param",       RICH_PARAM        },
  { L"bold",        RICH_BOLD         },
  { L"italic",      RICH_ITALIC       },
  { L"underline",   RICH_UNDERLINE    },
  { L"nofill",      RICH_NOFILL       },
  { L"excerpt",     RICH_EXCERPT      },
  { L"indent",      RICH_INDENT       },
  { L"indentright", RICH_INDENT_RIGHT },
  { L"center",      RICH_CENTER       },
  { L"flushleft",   RICH_FLUSHLEFT    },
  { L"flushright",  RICH_FLUSHRIGHT   },
  { L"flushboth",   RICH_FLUSHLEFT    },
  { L"color",       RICH_COLOR        },
  { L"x-color",     RICH_COLOR        },
  { NULL, -1 },
  
}

EnrichedTags - Lookup table of tags allowed in enriched text.

Definition at line 75 of file enriched.c.