DenysMedvid/pdf2htmlEX
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fix word space

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This commit is contained in:
Lu Wang 2013-04-05 18:07:37 +08:00
parent 6a8d111db6
commit cf636fd41f
3 changed files with 47 additions and 33 deletions
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54
src/HTMLRenderer/state.cc
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@ -181,22 +181,34 @@ void HTMLRenderer::check_state_change(GfxState * state)
double old_tm[6];
memcpy(old_tm, cur_text_tm, sizeof(old_tm));
// ctm & text ctm & hori scale
if(all_changed || ctm_changed || text_mat_changed || hori_scale_changed)
// rise
// depends draw_text_scale
if(all_changed || rise_changed || draw_text_scale_changed)
{
double new_rise = state->getRise() * draw_text_scale;
if(!equal(new_rise, cur_html_state.rise))
{
cur_html_state.rise = new_rise;
new_line_state = max<NewLineState>(new_line_state, NLS_SPAN);
}
}
// ctm & text ctm & hori scale & rise
if(all_changed || ctm_changed || text_mat_changed || hori_scale_changed || rise_changed)
{
double new_text_tm[6];
const double * m1 = state->getCTM();
const double * m2 = state->getTextMat();
double hori_scale = state->getHorizScaling();
double m1[6];
double m2[6];
new_text_tm[0] = (m1[0] * m2[0] + m1[2] * m2[1]) * hori_scale;
new_text_tm[1] = (m1[1] * m2[0] + m1[3] * m2[1]) * hori_scale;
new_text_tm[2] = m1[0] * m2[2] + m1[2] * m2[3];
new_text_tm[3] = m1[1] * m2[2] + m1[3] * m2[3];
new_text_tm[4] = m1[0] * m2[4] + m1[2] * m2[5] + m1[4];
new_text_tm[5] = m1[1] * m2[4] + m1[3] * m2[5] + m1[5];
//new_text_tm[4] = new_text_tm[5] = 0;
//the matrix with horizontal_scale and rise
m1[0] = state->getHorizScaling();
m1[3] = 1;
m1[5] = state->getRise();
m1[1] = m1[2] = m1[4] = 0;
tm_multiply(m2, state->getCTM(), state->getTextMat());
tm_multiply(new_text_tm, m2, m1);
if(!tm_equal(new_text_tm, cur_text_tm))
{
@ -265,7 +277,7 @@ void HTMLRenderer::check_state_change(GfxState * state)
// see if the new line is compatible with the current line with proper position shift
// don't bother doing the heavy job when (new_line_state == NLS_DIV)
// depends: rise & text position & transformation
// depends: text position & transformation
if(need_recheck_position && (new_line_state < NLS_DIV))
{
// try to transform the old origin under the new TM
@ -278,10 +290,6 @@ void HTMLRenderer::check_state_change(GfxState * state)
* CurTM[4] - OldTM[4] = OldTM[0] * (draw_tx + dx - cur_tx) + OldTM[2] * (draw_ty + dy - cur_ty)
* CurTM[5] - OldTM[5] = OldTM[1] * (draw_tx + dx - cur_tx) + OldTM[3] * (draw_ty + dy - cur_ty)
*
* For horizontal text, set dy = 0, and try to solve dx
* If dx can be solved, we can simply append a x-offset without creating a new line
*
* TODO, writing mode, set dx = 0 and solve dy
* TODO, try to merge when cur_tm and old_tm are proportional
*/
@ -406,18 +414,6 @@ void HTMLRenderer::check_state_change(GfxState * state)
}
}
// rise
// depends draw_text_scale
if(all_changed || rise_changed || draw_text_scale_changed)
{
double new_rise = state->getRise() * draw_text_scale;
if(!equal(new_rise, cur_html_state.rise))
{
cur_html_state.rise = new_rise;
new_line_state = max<NewLineState>(new_line_state, NLS_SPAN);
}
}
reset_state_change();
}

16
src/HTMLRenderer/text.cc
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@ -97,19 +97,27 @@ void HTMLRenderer::drawString(GfxState * state, GooString * s)
if((param->decompose_ligature) && (uLen > 1) && all_of(u, u+uLen, isLegalUnicode))
{
text_line_buf->append_unicodes(u, uLen);
// TODO: decomposed characters may be not with the same width as the original ligature, need to fix it.
}
else
{
Unicode uu;
if(cur_html_state.font_info->use_tounicode)
{
Unicode uu = check_unicode(u, uLen, code, font);
text_line_buf->append_unicodes(&uu, 1);
uu = check_unicode(u, uLen, code, font);
}
else
{
Unicode uu = unicode_from_font(code, font);
text_line_buf->append_unicodes(&uu, 1);
uu = unicode_from_font(code, font);
}
text_line_buf->append_unicodes(&uu, 1);
/*
* In PDF, word_space is appended if (n == 1 and *p = ' ')
* but in HTML, word_space is appended if (uu == ' ')
*/
int space_count = (is_space ? 1 : 0) - (uu == ' ' ? 1 : 0);
if(space_count != 0)
text_line_buf->append_offset(cur_word_space * draw_text_scale * space_count);
}
}

10
src/util/math.h
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@ -24,6 +24,16 @@ static inline bool tm_equal(const double * tm1, const double * tm2, int size = 6
return false;
return true;
}
static inline void tm_multiply(double * result, const double * m1, const double * m2)
{
result[0] = m1[0] * m2[0] + m1[2] * m2[1];
result[1] = m1[1] * m2[0] + m1[3] * m2[1];
result[2] = m1[0] * m2[2] + m1[2] * m2[3];
result[3] = m1[1] * m2[2] + m1[3] * m2[3];
result[4] = m1[0] * m2[4] + m1[2] * m2[5] + m1[4];
result[5] = m1[1] * m2[4] + m1[3] * m2[5] + m1[5];
}
static inline double hypot(double x, double y) { return std::sqrt(x*x+y*y); }
void tm_transform(const double * tm, double & x, double & y, bool is_delta = false);