include/wx/html/htmprint.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmprint.h
   3 // Purpose:     html printing classes
   4 // Author:      Vaclav Slavik
   5 // Created:     25/09/99
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) Vaclav Slavik
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_HTMPRINT_H_
  12 #define _WX_HTMPRINT_H_
  13
  14 #include "wx/defs.h"
  15
  16 #if wxUSE_HTML & wxUSE_PRINTING_ARCHITECTURE
  17
  18 #include "wx/html/htmlcell.h"
  19 #include "wx/html/winpars.h"
  20 #include "wx/html/htmlfilt.h"
  21
  22 #include "wx/print.h"
  23 #include "wx/printdlg.h"
  24
  25 #include <limits.h> // INT_MAX
  26
  27 //--------------------------------------------------------------------------------
  28 // wxHtmlDCRenderer
  29 //                  This class is capable of rendering HTML into specified
  30 //                  portion of DC
  31 //--------------------------------------------------------------------------------
  32
  33 class WXDLLIMPEXP_HTML wxHtmlDCRenderer : public wxObject
  34 {
  35 public:
  36     wxHtmlDCRenderer();
  37     virtual ~wxHtmlDCRenderer();
  38
  39     // Following 3 methods *must* be called before any call to Render:
  40
  41     // Assign DC to this render
  42     void SetDC(wxDC *dc, double pixel_scale = 1.0);
  43
  44     // Sets size of output rectangle, in pixels. Note that you *can't* change
  45     // width of the rectangle between calls to Render! (You can freely change height.)
  46     void SetSize(int width, int height);
  47
  48     // Sets the text to be displayed.
  49     // Basepath is base directory (html string would be stored there if it was in
  50     // file). It is used to determine path for loading images, for example.
  51     // isdir is false if basepath is filename, true if it is directory name
  52     // (see wxFileSystem for detailed explanation)
  53     void SetHtmlText(const wxString& html, const wxString& basepath = wxEmptyString, bool isdir = true);
  54
  55     // Sets fonts to be used when displaying HTML page. (if size null then default sizes used).
  56     void SetFonts(const wxString& normal_face, const wxString& fixed_face, const int *sizes = NULL);
  57
  58     // Sets font sizes to be relative to the given size or the system
  59     // default size; use either specified or default font
  60     void SetStandardFonts(int size = -1,
  61                           const wxString& normal_face = wxEmptyString,
  62                           const wxString& fixed_face = wxEmptyString);
  63
  64     // [x,y] is position of upper-left corner of printing rectangle (see SetSize)
  65     // from is y-coordinate of the very first visible cell
  66     // to is y-coordinate of the next following page break, if any
  67     // Returned value is y coordinate of first cell than didn't fit onto page.
  68     // Use this value as 'from' in next call to Render in order to print multiple pages
  69     // document
  70     // If dont_render is TRUE then nothing is rendered into DC and it only counts
  71     // pixels and return y coord of the next page
  72     //
  73     // known_pagebreaks and number_of_pages are used only when counting pages;
  74     // otherwise, their default values should be used. Their purpose is to
  75     // support pagebreaks using a subset of CSS2's <DIV>. The <DIV> handler
  76     // needs to know what pagebreaks have already been set so that it doesn't
  77     // set the same pagebreak twice.
  78     //
  79     // CAUTION! Render() changes DC's user scale and does NOT restore it!
  80     int Render(int x, int y, wxArrayInt& known_pagebreaks, int from = 0,
  81                int dont_render = false, int to = INT_MAX);
  82
  83     // returns total width of the html document
  84     int GetTotalWidth() const;
  85
  86     // returns total height of the html document
  87     // (compare Render's return value with this)
  88     int GetTotalHeight() const;
  89
  90 private:
  91     wxDC *m_DC;
  92     wxHtmlWinParser *m_Parser;
  93     wxFileSystem *m_FS;
  94     wxHtmlContainerCell *m_Cells;
  95     int m_MaxWidth, m_Width, m_Height;
  96
  97     wxDECLARE_NO_COPY_CLASS(wxHtmlDCRenderer);
  98 };
  99
 100
 101
 102
 103
 104 enum {
 105     wxPAGE_ODD,
 106     wxPAGE_EVEN,
 107     wxPAGE_ALL
 108 };
 109
 110
 111
 112 //--------------------------------------------------------------------------------
 113 // wxHtmlPrintout
 114 //                  This class is derived from standard wxWidgets printout class
 115 //                  and is used to print HTML documents.
 116 //--------------------------------------------------------------------------------
 117
 118
 119 class WXDLLIMPEXP_HTML wxHtmlPrintout : public wxPrintout
 120 {
 121 public:
 122     wxHtmlPrintout(const wxString& title = wxT("Printout"));
 123     virtual ~wxHtmlPrintout();
 124
 125     void SetHtmlText(const wxString& html, const wxString &basepath = wxEmptyString, bool isdir = true);
 126             // prepares the class for printing this html document.
 127             // Must be called before using the class, in fact just after constructor
 128             //
 129             // basepath is base directory (html string would be stored there if it was in
 130             // file). It is used to determine path for loading images, for example.
 131             // isdir is false if basepath is filename, true if it is directory name
 132             // (see wxFileSystem for detailed explanation)
 133
 134     void SetHtmlFile(const wxString &htmlfile);
 135             // same as SetHtmlText except that it takes regular file as the parameter
 136
 137     void SetHeader(const wxString& header, int pg = wxPAGE_ALL);
 138     void SetFooter(const wxString& footer, int pg = wxPAGE_ALL);
 139             // sets header/footer for the document. The argument is interpreted as HTML document.
 140             // You can use macros in it:
 141             //   @PAGENUM@ is replaced by page number
 142             //   @PAGESCNT@ is replaced by total number of pages
 143             //
 144             // pg is one of wxPAGE_ODD, wxPAGE_EVEN and wx_PAGE_ALL constants.
 145             // You can set different header/footer for odd and even pages
 146
 147     // Sets fonts to be used when displaying HTML page. (if size null then default sizes used).
 148     void SetFonts(const wxString& normal_face, const wxString& fixed_face, const int *sizes = NULL);
 149
 150     // Sets font sizes to be relative to the given size or the system
 151     // default size; use either specified or default font
 152     void SetStandardFonts(int size = -1,
 153                           const wxString& normal_face = wxEmptyString,
 154                           const wxString& fixed_face = wxEmptyString);
 155
 156     void SetMargins(float top = 25.2, float bottom = 25.2, float left = 25.2, float right = 25.2,
 157                     float spaces = 5);
 158             // sets margins in milimeters. Defaults to 1 inch for margins and 0.5cm for space
 159             // between text and header and/or footer
 160
 161     // wxPrintout stuff:
 162     bool OnPrintPage(int page);
 163     bool HasPage(int page);
 164     void GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo);
 165     bool OnBeginDocument(int startPage, int endPage);
 166     void OnPreparePrinting();
 167
 168     // Adds input filter
 169     static void AddFilter(wxHtmlFilter *filter);
 170
 171     // Cleanup
 172     static void CleanUpStatics();
 173
 174 private:
 175     // this function is called by the base class OnPreparePrinting()
 176     // implementation and by default checks whether the document fits into
 177     // pageArea horizontally and warns the user if it does not, giving him
 178     // the possibility to cancel printing in this case
 179     //
 180     // you may override it to either suppress this check if truncation of the
 181     // HTML being printed is acceptable or, on the contrary, add more checks to
 182     // it, e.g. for the fit in the vertical direction if the document should
 183     // always appear on a single page
 184     //
 185     // return true if printing should go ahead or false to cancel it
 186     virtual bool CheckFit(const wxSize& pageArea, const wxSize& docArea) const;
 187
 188     void RenderPage(wxDC *dc, int page);
 189             // renders one page into dc
 190     wxString TranslateHeader(const wxString& instr, int page);
 191             // substitute @PAGENUM@ and @PAGESCNT@ by real values
 192     void CountPages();
 193             // counts pages and fills m_NumPages and m_PageBreaks
 194
 195
 196 private:
 197     int m_NumPages;
 198     //int m_PageBreaks[wxHTML_PRINT_MAX_PAGES];
 199     wxArrayInt m_PageBreaks;
 200
 201     wxString m_Document, m_BasePath;
 202     bool m_BasePathIsDir;
 203     wxString m_Headers[2], m_Footers[2];
 204
 205     int m_HeaderHeight, m_FooterHeight;
 206     wxHtmlDCRenderer *m_Renderer, *m_RendererHdr;
 207     float m_MarginTop, m_MarginBottom, m_MarginLeft, m_MarginRight, m_MarginSpace;
 208
 209     // list of HTML filters
 210     static wxList m_Filters;
 211
 212     wxDECLARE_NO_COPY_CLASS(wxHtmlPrintout);
 213 };
 214
 215
 216
 217
 218
 219 //--------------------------------------------------------------------------------
 220 // wxHtmlEasyPrinting
 221 //                  This class provides very simple interface to printing
 222 //                  architecture. It allows you to print HTML documents only
 223 //                  with very few commands.
 224 //
 225 //                  Note : do not create this class on stack only.
 226 //                         You should create an instance on app startup and
 227 //                         use this instance for all printing. Why? The class
 228 //                         stores page&printer settings in it.
 229 //--------------------------------------------------------------------------------
 230
 231 class WXDLLIMPEXP_HTML wxHtmlEasyPrinting : public wxObject
 232 {
 233 public:
 234     wxHtmlEasyPrinting(const wxString& name = wxT("Printing"), wxWindow *parentWindow = NULL);
 235     virtual ~wxHtmlEasyPrinting();
 236
 237     bool PreviewFile(const wxString &htmlfile);
 238     bool PreviewText(const wxString &htmltext, const wxString& basepath = wxEmptyString);
 239             // Preview file / html-text for printing
 240             // (and offers printing)
 241             // basepath is base directory for opening subsequent files (e.g. from <img> tag)
 242
 243     bool PrintFile(const wxString &htmlfile);
 244     bool PrintText(const wxString &htmltext, const wxString& basepath = wxEmptyString);
 245             // Print file / html-text w/o preview
 246
 247     void PageSetup();
 248             // pop up printer or page setup dialog
 249
 250     void SetHeader(const wxString& header, int pg = wxPAGE_ALL);
 251     void SetFooter(const wxString& footer, int pg = wxPAGE_ALL);
 252             // sets header/footer for the document. The argument is interpreted as HTML document.
 253             // You can use macros in it:
 254             //   @PAGENUM@ is replaced by page number
 255             //   @PAGESCNT@ is replaced by total number of pages
 256             //
 257             // pg is one of wxPAGE_ODD, wxPAGE_EVEN and wx_PAGE_ALL constants.
 258             // You can set different header/footer for odd and even pages
 259
 260     void SetFonts(const wxString& normal_face, const wxString& fixed_face, const int *sizes = 0);
 261     // Sets fonts to be used when displaying HTML page. (if size null then default sizes used)
 262
 263     // Sets font sizes to be relative to the given size or the system
 264     // default size; use either specified or default font
 265     void SetStandardFonts(int size = -1,
 266                           const wxString& normal_face = wxEmptyString,
 267                           const wxString& fixed_face = wxEmptyString);
 268
 269     wxPrintData *GetPrintData();
 270     wxPageSetupDialogData *GetPageSetupData() {return m_PageSetupData;}
 271             // return page setting data objects.
 272             // (You can set their parameters.)
 273
 274     wxWindow* GetParentWindow() const { return m_ParentWindow; }
 275             // get the parent window
 276     void SetParentWindow(wxWindow* window) { m_ParentWindow = window; }
 277             // set the parent window
 278
 279 protected:
 280     virtual wxHtmlPrintout *CreatePrintout();
 281     virtual bool DoPreview(wxHtmlPrintout *printout1, wxHtmlPrintout *printout2);
 282     virtual bool DoPrint(wxHtmlPrintout *printout);
 283
 284 private:
 285     wxPrintData *m_PrintData;
 286     wxPageSetupDialogData *m_PageSetupData;
 287     wxString m_Name;
 288     int m_FontsSizesArr[7];
 289     int *m_FontsSizes;
 290     wxString m_FontFaceFixed, m_FontFaceNormal;
 291
 292     enum FontMode
 293     {
 294         FontMode_Explicit,
 295         FontMode_Standard
 296     };
 297     FontMode m_fontMode;
 298
 299     wxString m_Headers[2], m_Footers[2];
 300     wxWindow *m_ParentWindow;
 301
 302     wxDECLARE_NO_COPY_CLASS(wxHtmlEasyPrinting);
 303 };
 304
 305
 306
 307
 308 #endif  // wxUSE_HTML & wxUSE_PRINTING_ARCHITECTURE
 309
 310 #endif // _WX_HTMPRINT_H_
 311