mirror of
https://github.com/pdf2htmlEX/pdf2htmlEX.git
synced 2024-09-19 21:50:08 +00:00
420 lines
14 KiB
C++
420 lines
14 KiB
C++
/*
|
|
* HTMLRenderer.h
|
|
*
|
|
* by WangLu
|
|
*/
|
|
|
|
#ifndef HTMLRENDERER_H_
|
|
#define HTMLRENDERER_H_
|
|
|
|
#include <unordered_map>
|
|
#include <map>
|
|
#include <vector>
|
|
#include <set>
|
|
#include <sstream>
|
|
#include <cstdint>
|
|
#include <fstream>
|
|
|
|
#include <OutputDev.h>
|
|
#include <GfxState.h>
|
|
#include <Stream.h>
|
|
#include <PDFDoc.h>
|
|
#include <goo/gtypes.h>
|
|
#include <Object.h>
|
|
#include <GfxFont.h>
|
|
#include <Annot.h>
|
|
|
|
#include "Param.h"
|
|
#include "util.h"
|
|
#include "Preprocessor.h"
|
|
|
|
/*
|
|
* Naming Convention
|
|
*
|
|
* CSS classes
|
|
*
|
|
* _ - white space
|
|
* a - Annot link
|
|
* b - page Box
|
|
* d - page Decoration
|
|
* l - Line
|
|
* i - Image
|
|
* j - Js data
|
|
* p - Page
|
|
*
|
|
* Cd - CSS Draw
|
|
*
|
|
* Reusable CSS classes
|
|
*
|
|
* t<hex> - Transform matrix
|
|
* f<hex> - Font (also for font names)
|
|
* s<hex> - font Size
|
|
* l<hex> - Letter spacing
|
|
* w<hex> - Word spacing
|
|
* c<hex> - Color
|
|
* _<hex> - white space
|
|
* r<hex> - Rise
|
|
* h<hex> - Height
|
|
*
|
|
*/
|
|
|
|
namespace pdf2htmlEX {
|
|
|
|
class HTMLRenderer : public OutputDev
|
|
{
|
|
public:
|
|
HTMLRenderer(const Param * param);
|
|
virtual ~HTMLRenderer();
|
|
|
|
void process(PDFDoc * doc);
|
|
|
|
////////////////////////////////////////////////////
|
|
// OutputDev interface
|
|
////////////////////////////////////////////////////
|
|
|
|
// Does this device use upside-down coordinates?
|
|
// (Upside-down means (0,0) is the top left corner of the page.)
|
|
virtual GBool upsideDown() { return gFalse; }
|
|
|
|
// Does this device use drawChar() or drawString()?
|
|
virtual GBool useDrawChar() { return gFalse; }
|
|
|
|
// Does this device use beginType3Char/endType3Char? Otherwise,
|
|
// text in Type 3 fonts will be drawn with drawChar/drawString.
|
|
virtual GBool interpretType3Chars() { return gFalse; }
|
|
|
|
// Does this device need non-text content?
|
|
virtual GBool needNonText() { return gTrue; }
|
|
|
|
virtual void setDefaultCTM(double *ctm);
|
|
|
|
// Start a page.
|
|
virtual void startPage(int pageNum, GfxState *state);
|
|
|
|
// End a page.
|
|
virtual void endPage();
|
|
|
|
/*
|
|
* To optmize false alarms
|
|
* We just mark as changed, and recheck if they have been changed when we are about to output a new string
|
|
*/
|
|
virtual void updateAll(GfxState * state);
|
|
|
|
virtual void updateRise(GfxState * state);
|
|
virtual void updateTextPos(GfxState * state);
|
|
virtual void updateTextShift(GfxState * state, double shift);
|
|
|
|
virtual void updateFont(GfxState * state);
|
|
virtual void updateCTM(GfxState * state, double m11, double m12, double m21, double m22, double m31, double m32);
|
|
virtual void updateTextMat(GfxState * state);
|
|
virtual void updateHorizScaling(GfxState * state);
|
|
|
|
virtual void updateCharSpace(GfxState * state);
|
|
virtual void updateWordSpace(GfxState * state);
|
|
|
|
virtual void updateFillColor(GfxState * state);
|
|
|
|
|
|
/*
|
|
* Rendering
|
|
*/
|
|
|
|
virtual void drawString(GfxState * state, GooString * s);
|
|
|
|
virtual void drawImage(GfxState * state, Object * ref, Stream * str, int width, int height, GfxImageColorMap * colorMap, GBool interpolate, int *maskColors, GBool inlineImg);
|
|
|
|
virtual void stroke(GfxState *state) { css_draw(state, false); }
|
|
virtual void fill(GfxState *state) { css_draw(state, true); }
|
|
|
|
virtual void processLink(AnnotLink * al);
|
|
|
|
protected:
|
|
////////////////////////////////////////////////////
|
|
// misc
|
|
////////////////////////////////////////////////////
|
|
void pre_process();
|
|
void post_process();
|
|
|
|
// set flags
|
|
void fix_stream (std::ostream & out);
|
|
|
|
void add_tmp_file (const std::string & fn);
|
|
void clean_tmp_files ();
|
|
std::string dump_embedded_font (GfxFont * font, long long fn_id);
|
|
void embed_font(const std::string & filepath, GfxFont * font, FontInfo & info, bool get_metric_only = false);
|
|
|
|
////////////////////////////////////////////////////
|
|
// manage styles
|
|
////////////////////////////////////////////////////
|
|
const FontInfo * install_font(GfxFont * font);
|
|
void install_embedded_font(GfxFont * font, FontInfo & info);
|
|
void install_base_font(GfxFont * font, GfxFontLoc * font_loc, FontInfo & info);
|
|
void install_external_font (GfxFont * font, FontInfo & info);
|
|
|
|
long long install_font_size(double font_size);
|
|
long long install_transform_matrix(const double * tm);
|
|
long long install_letter_space(double letter_space);
|
|
long long install_word_space(double word_space);
|
|
long long install_color(const GfxRGB * rgb);
|
|
long long install_whitespace(double ws_width, double & actual_width);
|
|
long long install_rise(double rise);
|
|
long long install_height(double height);
|
|
|
|
////////////////////////////////////////////////////
|
|
// export css styles
|
|
////////////////////////////////////////////////////
|
|
/*
|
|
* remote font: to be retrieved from the web server
|
|
* local font: to be substituted with a local (client side) font
|
|
*/
|
|
void export_remote_font(const FontInfo & info, const std::string & suffix, const std::string & fontfileformat, GfxFont * font);
|
|
void export_remote_default_font(long long fn_id);
|
|
void export_local_font(const FontInfo & info, GfxFont * font, const std::string & original_font_name, const std::string & cssfont);
|
|
|
|
void export_font_size(long long fs_id, double font_size);
|
|
void export_transform_matrix(long long tm_id, const double * tm);
|
|
void export_letter_space(long long ls_id, double letter_space);
|
|
void export_word_space(long long ws_id, double word_space);
|
|
void export_color(long long color_id, const GfxRGB * rgb);
|
|
void export_whitespace(long long ws_id, double ws_width);
|
|
void export_rise(long long rise_id, double rise);
|
|
void export_height(long long height_id, double height);
|
|
|
|
// depending on single-html, to embed the content or add a link to it
|
|
// "type": specify the file type, usually it's the suffix, in which case this parameter could be ""
|
|
// "copy": indicates whether to copy the file into dest_dir, if not embedded
|
|
void embed_file(std::ostream & out, const std::string & path, const std::string & type, bool copy);
|
|
|
|
////////////////////////////////////////////////////
|
|
// state tracking
|
|
////////////////////////////////////////////////////
|
|
// check updated states, and determine new_line_stauts
|
|
// make sure this function can be called several times consecutively without problem
|
|
void check_state_change(GfxState * state);
|
|
// reset all ***_changed flags
|
|
void reset_state_change();
|
|
// prepare the line context, (close old tags, open new tags)
|
|
// make sure the current HTML style consistent with PDF
|
|
void prepare_text_line(GfxState * state);
|
|
void close_text_line();
|
|
|
|
////////////////////////////////////////////////////
|
|
// CSS drawing
|
|
////////////////////////////////////////////////////
|
|
void css_draw(GfxState *state, bool fill);
|
|
/*
|
|
* coordinates are to transformed by state->getCTM()
|
|
* (x,y) should be the bottom-left corner INCLUDING border
|
|
* w,h should be the metrics WITHOUT border
|
|
*
|
|
* line_color & fill_color may be specified as nullptr to indicate none
|
|
*/
|
|
void css_draw_rectangle(double x, double y, double w, double h,
|
|
double * line_width_array, int line_width_count,
|
|
const GfxRGB * line_color, const GfxRGB * fill_color,
|
|
GfxState * state);
|
|
|
|
|
|
////////////////////////////////////////////////////
|
|
// PDF stuffs
|
|
////////////////////////////////////////////////////
|
|
|
|
XRef * xref;
|
|
PDFDoc * cur_doc;
|
|
double default_ctm[6];
|
|
|
|
// page info
|
|
int pageNum;
|
|
double pageWidth ;
|
|
double pageHeight ;
|
|
|
|
/*
|
|
* The content of each page is first scaled with factor1 (>=1), then scale back with factor2(<=1)
|
|
*
|
|
* factor1 is use to multiplied with all metrics (height/width/font-size...), in order to improve accuracy
|
|
* factor2 is applied with css transform, and is exposed to Javascript
|
|
*
|
|
* factor1 & factor 2 are determined according to zoom and font-size-multiplier
|
|
*
|
|
*/
|
|
double text_zoom_factor (void) const { return text_scale_factor1 * text_scale_factor2; }
|
|
double text_scale_factor1;
|
|
double text_scale_factor2;
|
|
|
|
|
|
////////////////////////////////////////////////////
|
|
// states
|
|
////////////////////////////////////////////////////
|
|
bool line_opened;
|
|
enum NewLineState
|
|
{
|
|
NLS_NONE, // stay with the same style
|
|
NLS_SPAN, // open a new <span> if possible, otherwise a new <div>
|
|
NLS_DIV // has to open a new <div>
|
|
} new_line_state;
|
|
|
|
// The order is according to the appearance in check_state_change
|
|
// any state changed
|
|
bool all_changed;
|
|
// current position
|
|
double cur_tx, cur_ty; // real text position, in text coords
|
|
bool text_pos_changed;
|
|
|
|
// font & size
|
|
const FontInfo * cur_font_info;
|
|
double cur_font_size;
|
|
long long cur_fs_id;
|
|
bool font_changed;
|
|
|
|
// transform matrix
|
|
long long cur_ttm_id;
|
|
bool ctm_changed;
|
|
bool text_mat_changed;
|
|
// horizontal scaling
|
|
bool hori_scale_changed;
|
|
// this is CTM * TextMAT in PDF
|
|
// [4] and [5] are ignored,
|
|
// as we'll calculate the position of the origin separately
|
|
double cur_text_tm[6]; // unscaled
|
|
|
|
// letter spacing
|
|
long long cur_ls_id;
|
|
double cur_letter_space;
|
|
bool letter_space_changed;
|
|
|
|
// word spacing
|
|
long long cur_ws_id;
|
|
double cur_word_space;
|
|
bool word_space_changed;
|
|
|
|
// color
|
|
long long cur_color_id;
|
|
GfxRGB cur_color;
|
|
bool color_changed;
|
|
|
|
// rise
|
|
long long cur_rise_id;
|
|
double cur_rise;
|
|
bool rise_changed;
|
|
|
|
// optimize for web
|
|
// we try to render the final font size directly
|
|
// to reduce the effect of ctm as much as possible
|
|
|
|
// draw_ctm is cur_ctm scaled by 1/draw_text_scale,
|
|
// so everything redenered should be multiplied by draw_text_scale
|
|
double draw_text_tm[6];
|
|
double draw_font_size;
|
|
double draw_text_scale;
|
|
|
|
// the position of next char, in text coords
|
|
// this is actual position (in HTML), which might be different from cur_tx/ty (in PDF)
|
|
// also keep in mind that they are not the final position, as they will be transform by CTM (also true for cur_tx/ty)
|
|
double draw_tx, draw_ty;
|
|
|
|
// some metrics have to be determined after all elements in the lines have been seen
|
|
class LineBuffer {
|
|
public:
|
|
LineBuffer (HTMLRenderer * renderer) : renderer(renderer) { }
|
|
|
|
class State {
|
|
public:
|
|
void begin(std::ostream & out, const State * prev_state);
|
|
void end(std::ostream & out) const;
|
|
void hash(void);
|
|
int diff(const State & s) const;
|
|
|
|
enum {
|
|
FONT_ID,
|
|
FONT_SIZE_ID,
|
|
COLOR_ID,
|
|
LETTER_SPACE_ID,
|
|
WORD_SPACE_ID,
|
|
RISE_ID,
|
|
|
|
ID_COUNT
|
|
};
|
|
|
|
long long ids[ID_COUNT];
|
|
|
|
double ascent;
|
|
double descent;
|
|
double draw_font_size;
|
|
|
|
size_t start_idx; // index of the first Text using this state
|
|
// for optimzation
|
|
long long hash_value;
|
|
bool need_close;
|
|
|
|
static const char * format_str; // class names for each id
|
|
};
|
|
|
|
|
|
class Offset {
|
|
public:
|
|
size_t start_idx; // should put this idx before text[start_idx];
|
|
double width;
|
|
};
|
|
|
|
void reset(GfxState * state);
|
|
void append_unicodes(const Unicode * u, int l);
|
|
void append_offset(double width);
|
|
void append_state(void);
|
|
void flush(void);
|
|
|
|
private:
|
|
// retrieve state from renderer
|
|
void set_state(State & state);
|
|
|
|
HTMLRenderer * renderer;
|
|
|
|
double x, y;
|
|
long long tm_id;
|
|
|
|
std::vector<State> states;
|
|
std::vector<Offset> offsets;
|
|
std::vector<Unicode> text;
|
|
|
|
// for flush
|
|
std::vector<State*> stack;
|
|
|
|
} line_buf;
|
|
friend class LineBuffer;
|
|
|
|
// for font reencoding
|
|
int32_t * cur_mapping;
|
|
char ** cur_mapping2;
|
|
int * width_list;
|
|
Preprocessor preprocessor;
|
|
|
|
// for string formatting
|
|
string_formatter str_fmt;
|
|
|
|
////////////////////////////////////////////////////
|
|
// styles & resources
|
|
////////////////////////////////////////////////////
|
|
|
|
std::unordered_map<long long, FontInfo> font_name_map;
|
|
std::map<double, long long> font_size_map;
|
|
std::map<TM, long long> transform_matrix_map;
|
|
std::map<double, long long> letter_space_map;
|
|
std::map<double, long long> word_space_map;
|
|
std::unordered_map<GfxRGB, long long, GfxRGB_hash, GfxRGB_equal> color_map;
|
|
std::map<double, long long> whitespace_map;
|
|
std::map<double, long long> rise_map;
|
|
std::map<double, long long> height_map;
|
|
|
|
int image_count;
|
|
|
|
const Param * param;
|
|
std::ofstream html_fout, css_fout;
|
|
std::string html_path, css_path;
|
|
std::set<std::string> tmp_files;
|
|
|
|
static const std::string MANIFEST_FILENAME;
|
|
};
|
|
|
|
} //namespace pdf2htmlEX
|
|
|
|
#endif /* HTMLRENDERER_H_ */
|