qstyle.h File Reference

Quoted style. More...

#include <stdbool.h>
#include <stddef.h>

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Data Structures
struct	QuoteStyle
	Style of quoted text. More...

Functions
struct QuoteStyle *	qstyle_classify (struct QuoteStyle **quote_list, const char *qptr, size_t length, bool *force_redraw, int *q_level)
	Find a style for a string.
void	qstyle_free_tree (struct QuoteStyle **quote_list)
	Free an entire tree of QuoteStyle.
void	qstyle_recolor (struct QuoteStyle *quote_list)
	Recolour quotes after colour changes.

Detailed Description

Quoted style.

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 qstyle.h.

Function Documentation

qstyle_classify()

struct QuoteStyle * qstyle_classify	(	struct QuoteStyle **	quote_list,
		const char *	qptr,
		size_t	length,
		bool *	force_redraw,
		int *	q_level )

Find a style for a string.

Parameters

[out]	quote_list	List of quote colours
[in]	qptr	String to classify
[in]	length	Length of string
[out]	force_redraw	Set to true if a screen redraw is needed
[out]	q_level	Quoting level

Return values

ptr	Quoting style

Definition at line 136 of file qstyle.c.

{
  struct QuoteStyle *q_list = *quote_list;
  struct QuoteStyle *qc = NULL;
  struct QuoteStyle *tmp = NULL;
  struct QuoteStyle *ptr = NULL;
  struct QuoteStyle *save = NULL;
  const char *tail_qptr = NULL;
  size_t offset;
  size_t tail_lng;
  int index = -1;
 
  /* classify quoting prefix */
  while (q_list)
  {
    if (length <= q_list->prefix_len)
    {
      /* case 1: check the top level nodes */
 
      if (mutt_strn_equal(qptr, q_list->prefix, length))
      {
        if (length == q_list->prefix_len)
          return q_list; /* same prefix: return the current class */
 
        /* found shorter prefix */
        if (tmp)
        {
          /* found another branch for which tmp is a shorter prefix */
 
          /* save the next sibling for later */
          save = q_list->next;
 
          /* unlink q_list from the top level list */
          if (q_list->next)
            q_list->next->prev = q_list->prev;
          if (q_list->prev)
            q_list->prev->next = q_list->next;
 
          /* at this point, we have a tmp->down; link q_list to it */
          ptr = tmp->down;
          /* sibling order is important here, q_list should be linked last */
          while (ptr->next)
            ptr = ptr->next;
          ptr->next = q_list;
          q_list->next = NULL;
          q_list->prev = ptr;
          q_list->up = tmp;
 
          index = q_list->quote_n;
 
          /* next class to test; as above, we shouldn't go down */
          q_list = save;
        }
        else
        {
          /* add a node above q_list */
          tmp = qstyle_new();
          tmp->prefix = mutt_strn_dup(qptr, length);
          tmp->prefix_len = length;
 
          /* replace q_list by tmp in the top level list */
          if (q_list->next)
          {
            tmp->next = q_list->next;
            q_list->next->prev = tmp;
          }
          if (q_list->prev)
          {
            tmp->prev = q_list->prev;
            q_list->prev->next = tmp;
          }
 
          /* make q_list a child of tmp */
          tmp->down = q_list;
          q_list->up = tmp;
 
          /* q_list has no siblings for now */
          q_list->next = NULL;
          q_list->prev = NULL;
 
          /* update the root if necessary */
          if (q_list == *quote_list)
            *quote_list = tmp;
 
          index = q_list->quote_n;
 
          /* tmp should be the return class too */
          qc = tmp;
 
          /* next class to test; if tmp is a shorter prefix for another
           * node, that node can only be in the top level list, so don't
           * go down after this point */
          q_list = tmp->next;
        }
 
        /* we found a shorter prefix, so certain quotes have changed classes */
        *force_redraw = true;
        continue;
      }
      else
      {
        /* shorter, but not a substring of the current class: try next */
        q_list = q_list->next;
        continue;
      }
    }
    else
    {
      /* case 2: try subclassing the current top level node */
 
      /* tmp != NULL means we already found a shorter prefix at case 1 */
      if (!tmp && mutt_strn_equal(qptr, q_list->prefix, q_list->prefix_len))
      {
        /* ok, it's a subclass somewhere on this branch */
 
        ptr = q_list;
        offset = q_list->prefix_len;
 
        q_list = q_list->down;
        tail_lng = length - offset;
        tail_qptr = qptr + offset;
 
        while (q_list)
        {
          if (length <= q_list->prefix_len)
          {
            if (mutt_strn_equal(tail_qptr, (q_list->prefix) + offset, tail_lng))
            {
              /* same prefix: return the current class */
              if (length == q_list->prefix_len)
                return q_list;
 
              /* found shorter common prefix */
              if (!tmp)
              {
                /* add a node above q_list */
                tmp = qstyle_new();
                tmp->prefix = mutt_strn_dup(qptr, length);
                tmp->prefix_len = length;
 
                /* replace q_list by tmp */
                if (q_list->next)
                {
                  tmp->next = q_list->next;
                  q_list->next->prev = tmp;
                }
                if (q_list->prev)
                {
                  tmp->prev = q_list->prev;
                  q_list->prev->next = tmp;
                }
 
                /* make q_list a child of tmp */
                tmp->down = q_list;
                tmp->up = q_list->up;
                q_list->up = tmp;
                if (tmp->up->down == q_list)
                  tmp->up->down = tmp;
 
                /* q_list has no siblings */
                q_list->next = NULL;
                q_list->prev = NULL;
 
                index = q_list->quote_n;
 
                /* tmp should be the return class too */
                qc = tmp;
 
                /* next class to test */
                q_list = tmp->next;
              }
              else
              {
                /* found another branch for which tmp is a shorter prefix */
 
                /* save the next sibling for later */
                save = q_list->next;
 
                /* unlink q_list from the top level list */
                if (q_list->next)
                  q_list->next->prev = q_list->prev;
                if (q_list->prev)
                  q_list->prev->next = q_list->next;
 
                /* at this point, we have a tmp->down; link q_list to it */
                ptr = tmp->down;
                while (ptr->next)
                  ptr = ptr->next;
                ptr->next = q_list;
                q_list->next = NULL;
                q_list->prev = ptr;
                q_list->up = tmp;
 
                index = q_list->quote_n;
 
                /* next class to test */
                q_list = save;
              }
 
              /* we found a shorter prefix, so we need a redraw */
              *force_redraw = true;
              continue;
            }
            else
            {
              q_list = q_list->next;
              continue;
            }
          }
          else
          {
            /* longer than the current prefix: try subclassing it */
            if (!tmp && mutt_strn_equal(tail_qptr, (q_list->prefix) + offset,
                                        q_list->prefix_len - offset))
            {
              /* still a subclass: go down one level */
              ptr = q_list;
              offset = q_list->prefix_len;
 
              q_list = q_list->down;
              tail_lng = length - offset;
              tail_qptr = qptr + offset;
 
              continue;
            }
            else
            {
              /* nope, try the next prefix */
              q_list = q_list->next;
              continue;
            }
          }
        }
 
        /* still not found so far: add it as a sibling to the current node */
        if (!qc)
        {
          tmp = qstyle_new();
          tmp->prefix = mutt_strn_dup(qptr, length);
          tmp->prefix_len = length;
 
          if (ptr->down)
          {
            tmp->next = ptr->down;
            ptr->down->prev = tmp;
          }
          ptr->down = tmp;
          tmp->up = ptr;
 
          tmp->quote_n = (*q_level)++;
          tmp->attr_color = quoted_colors_get(tmp->quote_n);
 
          return tmp;
        }
        else
        {
          if (index != -1)
            qstyle_insert(*quote_list, tmp, index, q_level);
 
          return qc;
        }
      }
      else
      {
        /* nope, try the next prefix */
        q_list = q_list->next;
        continue;
      }
    }
  }
 
  if (!qc)
  {
    /* not found so far: add it as a top level class */
    qc = qstyle_new();
    qc->prefix = mutt_strn_dup(qptr, length);
    qc->prefix_len = length;
    qc->quote_n = (*q_level)++;
    qc->attr_color = quoted_colors_get(qc->quote_n);
 
    if (*quote_list)
    {
      if ((*quote_list)->next)
      {
        qc->next = (*quote_list)->next;
        qc->next->prev = qc;
      }
      (*quote_list)->next = qc;
      qc->prev = *quote_list;
    }
    else
    {
      *quote_list = qc;
    }
  }
 
  if (index != -1)
    qstyle_insert(*quote_list, tmp, index, q_level);
 
  return qc;
}

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qstyle_free_tree()

void qstyle_free_tree

(

struct QuoteStyle **

quote_list

)

Free an entire tree of QuoteStyle.

Parameters

[out]

quote_list

Quote list to free

Note

Use qstyle_free() to free a single object

Definition at line 58 of file qstyle.c.

{
  struct QuoteStyle *next = NULL;
 
  while (*quote_list)
  {
    if ((*quote_list)->down)
      qstyle_free_tree(&((*quote_list)->down));
    next = (*quote_list)->next;
    qstyle_free(quote_list);
    *quote_list = next;
  }
}

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qstyle_recolor()

void qstyle_recolor

(

struct QuoteStyle *

quote_list

)

Recolour quotes after colour changes.

Parameters

quote_list

List of quote colours

Definition at line 468 of file qstyle.c.

{
  if (!quote_list)
    return;
 
  int num = quoted_colors_num_used();
  int cur = 0;
 
  qstyle_recurse(quote_list, num, &cur);
}

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