/*

 * Copyright © 2021  Behdad Esfahbod.

 *

 *  This is part of HarfBuzz, a text shaping library.

 *

 * Permission is hereby granted, without written agreement and without

 * license or royalty fees, to use, copy, modify, and distribute this

 * software and its documentation for any purpose, provided that the

 * above copyright notice and the following two paragraphs appear in

 * all copies of this software.

 *

 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR

 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES

 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN

 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

 * DAMAGE.

 *

 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,

 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS

 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO

 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

 */

#include "hb.hh"

#ifndef HB_NO_OT_SHAPE

#include "hb-ot-shaper-syllabic.hh"

bool

hb_syllabic_insert_dotted_circles (hb_font_t *font,

           hb_buffer_t *buffer,

           unsigned int broken_syllable_type,

           unsigned int dottedcircle_category,

           int repha_category,

           int dottedcircle_position)

{

  if (unlikely (buffer->flags & HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE))

    return false;

  if (likely (!(buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE)))

  {

    if (buffer->messaging ())

      (void) buffer->message (font, "skipped inserting dotted-circles because there is no broken syllables");

    return false;

  }

  if (buffer->messaging () &&

      !buffer->message (font, "start inserting dotted-circles"))

    return false;

  hb_codepoint_t dottedcircle_glyph;

  if (!font->get_nominal_glyph (0x25CCu, &dottedcircle_glyph))

    return false;

  hb_glyph_info_t dottedcircle = {0};

  dottedcircle.codepoint = 0x25CCu;

  dottedcircle.ot_shaper_var_u8_category() = dottedcircle_category;

  if (dottedcircle_position != -1)

    dottedcircle.ot_shaper_var_u8_auxiliary() = dottedcircle_position;

  dottedcircle.codepoint = dottedcircle_glyph;

  buffer->clear_output ();

  buffer->idx = 0;

  unsigned int last_syllable = 0;

  while (buffer->idx < buffer->len && buffer->successful)

  {

    unsigned int syllable = buffer->cur().syllable();

    if (unlikely (last_syllable != syllable && (syllable & 0x0F) == broken_syllable_type))

    {

      last_syllable = syllable;

      hb_glyph_info_t ginfo = dottedcircle;

      ginfo.cluster = buffer->cur().cluster;

      ginfo.mask = buffer->cur().mask;

      ginfo.syllable() = buffer->cur().syllable();

      /* Insert dottedcircle after possible Repha. */

      if (repha_category != -1)

      {

  while (buffer->idx < buffer->len && buffer->successful &&

         last_syllable == buffer->cur().syllable() &&

         buffer->cur().ot_shaper_var_u8_category() == (unsigned) repha_category)

    (void) buffer->next_glyph ();

      }

      (void) buffer->output_info (ginfo);

    }

    else

      (void) buffer->next_glyph ();

  }

  buffer->sync ();

  if (buffer->messaging ())

    (void) buffer->message (font, "end inserting dotted-circles");

  return true;

}

HB_INTERNAL bool

hb_syllabic_clear_var (const hb_ot_shape_plan_t *plan,

           hb_font_t *font,

           hb_buffer_t *buffer)

{

  HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);

  return false;

}

#endif