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mirror of https://github.com/pdf2htmlEX/pdf2htmlEX.git synced 2024-12-22 13:00:08 +00:00
This commit is contained in:
Lu Wang 2013-02-05 20:45:56 +08:00
parent 820f06d940
commit 225aa23dca

View File

@ -43,317 +43,314 @@ public:
class HTMLRenderer : public OutputDev
{
public:
HTMLRenderer(const Param * param);
virtual ~HTMLRenderer();
public:
HTMLRenderer(const Param * param);
virtual ~HTMLRenderer();
void process(PDFDoc * doc);
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; }
////////////////////////////////////////////////////
// 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 drawChar() or drawString()?
virtual GBool useDrawChar() { return gFalse; }
// Does this device use functionShadedFill(), axialShadedFill(), and
// radialShadedFill()? If this returns false, these shaded fills
// will be reduced to a series of other drawing operations.
virtual GBool useShadedFills(int type) { return (type == 2) ? gTrue: gFalse; }
// Does this device use functionShadedFill(), axialShadedFill(), and
// radialShadedFill()? If this returns false, these shaded fills
// will be reduced to a series of other drawing operations.
virtual GBool useShadedFills(int type) { return (type == 2) ? gTrue: 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 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 (param->process_nontext) ? gTrue: gFalse; }
// Does this device need non-text content?
virtual GBool needNonText() { return (param->process_nontext) ? gTrue: gFalse; }
virtual void setDefaultCTM(double *ctm);
virtual void setDefaultCTM(double *ctm);
// Start a page.
// UGLY: These 2 versions are for different versions of poppler
virtual void startPage(int pageNum, GfxState *state);
virtual void startPage(int pageNum, GfxState *state, XRef * xref);
// Start a page.
// UGLY: These 2 versions are for different versions of poppler
virtual void startPage(int pageNum, GfxState *state);
virtual void startPage(int pageNum, GfxState *state, XRef * xref);
// End a page.
virtual void endPage();
// End a page.
virtual void endPage();
/*
* To optimize false alarms
* We just mark as changed, and recheck if they have been changed when we are about to output a new string
*/
/*
* To optimize false alarms
* We just mark as changed, and recheck if they have been changed when we are about to output a new string
*/
/*
* Ugly implementation of save/restore
*/
virtual void saveState(GfxState * state) { updateAll(state); }
virtual void restoreState(GfxState * state) { updateAll(state); }
/*
* Ugly implementation of save/restore
*/
virtual void saveState(GfxState * state) { updateAll(state); }
virtual void restoreState(GfxState * state) { updateAll(state); }
virtual void updateAll(GfxState * state);
virtual void updateAll(GfxState * state);
virtual void updateRise(GfxState * state);
virtual void updateTextPos(GfxState * state);
virtual void updateTextShift(GfxState * state, double shift);
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 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 updateCharSpace(GfxState * state);
virtual void updateWordSpace(GfxState * state);
virtual void updateRender(GfxState * state);
virtual void updateRender(GfxState * state);
virtual void updateFillColorSpace(GfxState * state);
virtual void updateStrokeColorSpace(GfxState * state);
virtual void updateFillColor(GfxState * state);
virtual void updateStrokeColor(GfxState * state);
virtual void updateFillColorSpace(GfxState * state);
virtual void updateStrokeColorSpace(GfxState * state);
virtual void updateFillColor(GfxState * state);
virtual void updateStrokeColor(GfxState * state);
/*
* Rendering
*/
virtual void drawString(GfxState * state, GooString * s);
/*
* 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 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_do_path(state, false); }
virtual void fill(GfxState *state) { css_do_path(state, true); }
virtual GBool axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax);
virtual void stroke(GfxState *state) { css_do_path(state, false); }
virtual void fill(GfxState *state) { css_do_path(state, true); }
virtual GBool axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax);
virtual void processLink(AnnotLink * al);
virtual void processLink(AnnotLink * al);
/* capacity test */
bool can_stroke(GfxState *state) { return css_do_path(state, false, true); }
bool can_fill(GfxState *state) { return css_do_path(state, true, true); }
/* capacity test */
bool can_stroke(GfxState *state) { return css_do_path(state, false, true); }
bool can_fill(GfxState *state) { return css_do_path(state, true, true); }
protected:
////////////////////////////////////////////////////
// misc
////////////////////////////////////////////////////
void pre_process(PDFDoc * doc);
void post_process();
protected:
////////////////////////////////////////////////////
// misc
////////////////////////////////////////////////////
void pre_process(PDFDoc * doc);
void post_process();
void process_outline();
void process_outline_items(GooList * items);
void process_outline();
void process_outline_items(GooList * items);
void set_stream_flags (std::ostream & out);
void set_stream_flags (std::ostream & out);
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);
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);
// convert a LinkAction to a string that our Javascript code can understand
std::string get_linkaction_str(LinkAction *, std::string & detail);
// convert a LinkAction to a string that our Javascript code can understand
std::string get_linkaction_str(LinkAction *, std::string & detail);
////////////////////////////////////////////////////
// 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);
////////////////////////////////////////////////////
// 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_fill_color(const GfxRGB * rgb);
long long install_stroke_color(const GfxRGB * rgb);
long long install_fill_color(const GfxRGB * rgb);
long long install_stroke_color(const GfxRGB * rgb);
////////////////////////////////////////////////////
// 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, 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);
////////////////////////////////////////////////////
// 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, 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_fill_color(long long color_id, const GfxRGB * rgb);
void export_stroke_color(long long color_id, const GfxRGB * rgb);
void export_fill_color(long long color_id, const GfxRGB * rgb);
void export_stroke_color(long long color_id, const GfxRGB * rgb);
// 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);
// 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
////////////////////////////////////////////////////
// reset all states
void reset_state();
// reset all ***_changed flags
void reset_state_change();
// 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);
// 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();
////////////////////////////////////////////////////
// state tracking
////////////////////////////////////////////////////
// reset all states
void reset_state();
// reset all ***_changed flags
void reset_state_change();
// 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);
// 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
////////////////////////////////////////////////////
/*
* test_only is for capacity check
*/
bool css_do_path(GfxState *state, bool fill, bool test_only = false);
/*
* 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
* style_function & style_function_data may be provided to provide more styles
*/
void css_draw_rectangle(double x, double y, double w, double h, const double * tm,
double * line_width_array, int line_width_count,
const GfxRGB * line_color, const GfxRGB * fill_color,
void (*style_function)(void *, std::ostream &) = nullptr, void * style_function_data = nullptr );
////////////////////////////////////////////////////
// CSS drawing
////////////////////////////////////////////////////
/*
* test_only is for capacity check
*/
bool css_do_path(GfxState *state, bool fill, bool test_only = false);
/*
* 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
* style_function & style_function_data may be provided to provide more styles
*/
void css_draw_rectangle(double x, double y, double w, double h, const double * tm,
double * line_width_array, int line_width_count,
const GfxRGB * line_color, const GfxRGB * fill_color,
void (*style_function)(void *, std::ostream &) = nullptr, void * style_function_data = nullptr );
////////////////////////////////////////////////////
// PDF stuffs
////////////////////////////////////////////////////
XRef * xref;
PDFDoc * cur_doc;
Catalog * cur_catalog;
////////////////////////////////////////////////////
// PDF stuffs
////////////////////////////////////////////////////
XRef * xref;
PDFDoc * cur_doc;
Catalog * cur_catalog;
double default_ctm[6];
double default_ctm[6];
// page info
int pageNum;
double pageWidth ;
double pageHeight ;
// 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;
/*
* 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;
////////////////////////////////////////////////////
// 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
// font & size
const FontInfo * cur_font_info;
bool font_changed;
// cur_font_size is as in GfxState,
// font_size_manager saves the final font size used in HTML
double cur_font_size;
// cur_font_size and cur_text_tm are unscaled (the same as in PDF)
double cur_font_size;
// 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
// transform matrix
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
bool text_pos_changed;
bool font_changed;
bool ctm_changed;
bool text_mat_changed;
bool hori_scale_changed;
bool letter_space_changed;
bool word_space_changed;
bool rise_changed;
// letter spacing
bool letter_space_changed;
bool word_space_changed;
// font & size
const FontInfo * cur_font_info;
// fill color
long long cur_fill_color_id;
GfxRGB cur_fill_color;
bool cur_has_fill;
bool fill_color_changed;
// fill color
long long cur_fill_color_id;
GfxRGB cur_fill_color;
bool cur_has_fill;
bool fill_color_changed;
// stroke color
long long cur_stroke_color_id;
GfxRGB cur_stroke_color;
bool cur_has_stroke;
bool stroke_color_changed;
bool rise_changed;
// stroke color
long long cur_stroke_color_id;
GfxRGB cur_stroke_color;
bool cur_has_stroke;
bool stroke_color_changed;
// managers store values actually used in HTML (i.e. scaled)
FontSizeManager font_size_manager;
LetterSpaceManager letter_space_manager;
WordSpaceManager word_space_manager;
RiseManager rise_manager;
WhitespaceManager whitespace_manager;
HeightManager height_manager;
LeftManager left_manager;
TransformMatrixManager transform_matrix_manager;
// optimize for web
// we try to render the final font size directly
// to reduce the effect of ctm as much as possible
// the actual tm used is `real tm in PDF` scaled by 1/draw_text_scale,
// so everything redenered should be multiplied by draw_text_scale
double draw_text_scale;
// managers store values actually used in HTML (i.e. scaled)
FontSizeManager font_size_manager;
LetterSpaceManager letter_space_manager;
WordSpaceManager word_space_manager;
RiseManager rise_manager;
WhitespaceManager whitespace_manager;
HeightManager height_manager;
LeftManager left_manager;
TransformMatrixManager transform_matrix_manager;
// 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;
// optimize for web
// we try to render the final font size directly
// to reduce the effect of ctm as much as possible
// the actual tm used is `real tm in PDF` scaled by 1/draw_text_scale,
// so everything redenered should be multiplied by draw_text_scale
double draw_text_scale;
// some metrics have to be determined after all elements in the lines have been seen
// see TextLineBuffer.h
class TextLineBuffer;
friend class TextLineBuffer;
TextLineBuffer * text_line_buf;
// 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;
// for font reencoding
int32_t * cur_mapping;
char ** cur_mapping2;
int * width_list;
// some metrics have to be determined after all elements in the lines have been seen
// see TextLineBuffer.h
class TextLineBuffer;
friend class TextLineBuffer;
TextLineBuffer * text_line_buf;
Preprocessor preprocessor;
TmpFiles tmp_files;
// for font reencoding
int32_t * cur_mapping;
char ** cur_mapping2;
int * width_list;
// for string formatting
StringFormatter str_fmt;
Preprocessor preprocessor;
TmpFiles tmp_files;
////////////////////////////////////////////////////
// styles & resources
////////////////////////////////////////////////////
// for string formatting
StringFormatter str_fmt;
std::unordered_map<long long, FontInfo> font_name_map;
std::unordered_map<GfxRGB, long long, GfxRGB_hash, GfxRGB_equal> fill_color_map, stroke_color_map;
////////////////////////////////////////////////////
// styles & resources
////////////////////////////////////////////////////
const Param * param;
std::unordered_map<long long, FontInfo> font_name_map;
std::unordered_map<GfxRGB, long long, GfxRGB_hash, GfxRGB_equal> fill_color_map, stroke_color_map;
struct {
std::ofstream fs;
std::string path;
} f_outline, f_pages, f_css;
const Param * param;
static const std::string MANIFEST_FILENAME;
struct {
std::ofstream fs;
std::string path;
} f_outline, f_pages, f_css;
static const std::string MANIFEST_FILENAME;
};
} //namespace pdf2htmlEX