complete.c

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#include "config.h"
#include <stddef.h>
#include "mutt/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "lib.h"
#include "complete/lib.h"
#include "editor/lib.h"

static bool is_pattern_prefix(wchar_t c)
{
  return (c == '~') || (c == '%') || (c == '=');
}

static enum FunctionRetval complete_pattern(struct EnterWindowData *wdata, int op)
{
  if (!wdata || ((op != OP_EDITOR_COMPLETE) && (op != OP_EDITOR_COMPLETE_QUERY)))
    return FR_NO_ACTION;
 
  size_t i = wdata->state->curpos;
 
  // Check if cursor is right after a pattern prefix (~, %, or =)
  if (i && is_pattern_prefix(wdata->state->wbuf[i - 1]))
  {
    if (dlg_pattern(wdata->buffer))
      replace_part(wdata->state, i - 1, wdata->buffer->data);
    buf_fix_dptr(wdata->buffer);
    return FR_CONTINUE;
  }
 
  // Search backwards for a pattern prefix
  for (; (i > 0) && !is_pattern_prefix(wdata->state->wbuf[i - 1]); i--)
    ; // do nothing
 
  if ((i > 0) && (i < wdata->state->curpos) &&
      (wdata->state->wbuf[i - 1] == '~') && (wdata->state->wbuf[i] == 'y'))
  {
    // Label completion for ~y pattern
    i++;
    buf_mb_wcstombs(wdata->buffer, wdata->state->wbuf + i, wdata->state->curpos - i);
    int rc = mutt_label_complete(wdata->cd, wdata->buffer, wdata->tabs);
    replace_part(wdata->state, i, wdata->buffer->data);
    buf_fix_dptr(wdata->buffer);
    if (rc != 1)
    {
      return FR_CONTINUE;
    }
  }
  else
  {
    return FR_NO_ACTION;
  }
 
  return FR_SUCCESS;
}

const struct CompleteOps CompletePatternOps = {
  .complete = complete_pattern,
};