DenysMedvid/pdf2htmlEX
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working

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This commit is contained in:
Lu Wang 2013-04-03 14:17:27 +08:00
parent 78fe4b99e8
commit 65fa519f2c
1 changed files with 14 additions and 6 deletions
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20
src/HTMLRenderer/TextLineBuffer.cc
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@ -255,10 +255,9 @@ void HTMLRenderer::TextLineBuffer::optimize()
double old_ws_eps = ws_manager.get_eps();
ws_manager.set_eps(EPS);
auto offset_iter = offsets.begin();
auto offset_iter1 = offsets.begin();
std::map<double, int> width_map;
// optimize word space
// set proper hash_umask
long long word_space_umask = State::umask_by_id(State::WORD_SPACE_ID);
for(auto state_iter2 = states.begin(), state_iter1 = state_iter2++;
@ -272,6 +271,14 @@ void HTMLRenderer::TextLineBuffer::optimize()
auto text_iter1 = text.begin() + text_idx1;
auto text_iter2 = text.begin() + text_idx2;
while((offset_iter1 != offsets.end()) && (offset_iter1->start_idx <= text_idx1))
++ offset_iter1;
auto offset_iter2 = offset_iter1;
for(; (offset_iter2 != offsets.end()) && (offset_iter2->start_idx <= text_idx2); ++offset_iter2) { }
// In some PDF files all letter spaces are implemented as position shifts between each letter
// try to simplify it with a proper letter space
// In some PDF files all spaces are converted into positionig shift
// We may try to change (some of) them to ' ' and adjust word_space accordingly
// This can also be applied when param->space_as_offset is set
@ -283,13 +290,11 @@ void HTMLRenderer::TextLineBuffer::optimize()
// collect widths
width_map.clear();
while((offset_iter != offsets.end()) && (offset_iter->start_idx <= text_idx1))
++ offset_iter;
double threshold = (state_iter1->em_size()) * (renderer->param->space_threshold);
for(; (offset_iter != offsets.end()) && (offset_iter->start_idx <= text_idx2); ++offset_iter)
for(auto off_iter = offset_iter1; off_iter != offset_iter2; ++off_iter)
{
double target = offset_iter->width;
double target = off_iter->width;
// we don't want to add spaces for tiny gaps, or even negative shifts
if(target < threshold - EPS)
continue;
@ -330,6 +335,9 @@ void HTMLRenderer::TextLineBuffer::optimize()
state_iter1->ids[State::WORD_SPACE_ID] = ws_manager.install(new_word_space, &(state_iter1->word_space));
// mark that the word_space is not free
state_iter1->hash_umask &= (~word_space_umask);
offset_iter1 = offset_iter2;
}
// restore old eps