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/*
* 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