Vector*
PolyCompiler_Highlight_Spans_IMP(PolyCompiler *self, Searcher *searcher,
DocVector *doc_vec, String *field) {
PolyCompilerIVARS *const ivars = PolyCompiler_IVARS(self);
Vector *spans = Vec_new(0);
for (size_t i = 0, max = Vec_Get_Size(ivars->children); i < max; i++) {
Compiler *child = (Compiler*)Vec_Fetch(ivars->children, i);
Vector *child_spans = Compiler_Highlight_Spans(child, searcher,
doc_vec, field);
if (child_spans) {
Vec_Push_All(spans, child_spans);
DECREF(child_spans);
}
}
return spans;
}
String*
Highlighter_Create_Excerpt_IMP(Highlighter *self, HitDoc *hit_doc) {
HighlighterIVARS *const ivars = Highlighter_IVARS(self);
String *field_val = (String*)HitDoc_Extract(hit_doc, ivars->field);
String *retval;
if (!field_val || !Obj_Is_A((Obj*)field_val, STRING)) {
retval = NULL;
}
else if (!Str_Get_Size(field_val)) {
// Empty string yields empty string.
retval = Str_new_from_trusted_utf8("", 0);
}
else {
DocVector *doc_vec
= Searcher_Fetch_Doc_Vec(ivars->searcher,
HitDoc_Get_Doc_ID(hit_doc));
VArray *maybe_spans
= Compiler_Highlight_Spans(ivars->compiler, ivars->searcher,
doc_vec, ivars->field);
VArray *score_spans = maybe_spans ? maybe_spans : VA_new(0);
VA_Sort(score_spans, NULL, NULL);
HeatMap *heat_map
= HeatMap_new(score_spans, (ivars->excerpt_length * 2) / 3);
int32_t top;
String *raw_excerpt
= Highlighter_Raw_Excerpt(self, field_val, &top, heat_map);
String *highlighted
= Highlighter_Highlight_Excerpt(self, score_spans, raw_excerpt,
top);
DECREF(raw_excerpt);
DECREF(heat_map);
DECREF(score_spans);
DECREF(doc_vec);
retval = highlighted;
}
DECREF(field_val);
return retval;
}