src/richtext/richtextstyles.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        richtextstyles.cpp
   3 // Purpose:     Style management for wxRichTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16   #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtextstyles.h"
  22
  23 #ifndef WX_PRECOMP
  24   #include "wx/wx.h"
  25 #endif
  26
  27 #include "wx/filename.h"
  28 #include "wx/clipbrd.h"
  29 #include "wx/wfstream.h"
  30 #include "wx/module.h"
  31
  32 #include "wx/richtext/richtextctrl.h"
  33
  34 IMPLEMENT_CLASS(wxRichTextStyleDefinition, wxObject)
  35 IMPLEMENT_CLASS(wxRichTextCharacterStyleDefinition, wxRichTextStyleDefinition)
  36 IMPLEMENT_CLASS(wxRichTextParagraphStyleDefinition, wxRichTextStyleDefinition)
  37
  38 /*!
  39  * The style manager
  40  */
  41
  42 IMPLEMENT_CLASS(wxRichTextStyleSheet, wxObject)
  43
  44 /// Initialisation
  45 void wxRichTextStyleSheet::Init()
  46 {
  47 }
  48
  49 /// Add a definition to one of the style lists
  50 bool wxRichTextStyleSheet::AddStyle(wxList& list, wxRichTextStyleDefinition* def)
  51 {
  52     if (!list.Find(def))
  53         list.Append(def);
  54     return true;
  55 }
  56
  57 /// Remove a style
  58 bool wxRichTextStyleSheet::RemoveStyle(wxList& list, wxRichTextStyleDefinition* def, bool deleteStyle)
  59 {
  60     wxList::compatibility_iterator node = list.Find(def);
  61     if (node)
  62     {
  63         wxRichTextStyleDefinition* def = (wxRichTextStyleDefinition*) node->GetData();
  64         list.Erase(node);
  65         if (deleteStyle)
  66             delete def;
  67         return true;
  68     }
  69     else
  70         return false;
  71 }
  72
  73 /// Find a definition by name
  74 wxRichTextStyleDefinition* wxRichTextStyleSheet::FindStyle(const wxList& list, const wxString& name) const
  75 {
  76     for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
  77     {
  78         wxRichTextStyleDefinition* def = (wxRichTextStyleDefinition*) node->GetData();
  79         if (def->GetName().Lower() == name.Lower())
  80             return def;
  81     }
  82     return NULL;
  83 }
  84
  85 /// Delete all styles
  86 void wxRichTextStyleSheet::DeleteStyles()
  87 {
  88     WX_CLEAR_LIST(wxList, m_characterStyleDefinitions);
  89     WX_CLEAR_LIST(wxList, m_paragraphStyleDefinitions);
  90 }
  91
  92 #if wxUSE_HTML
  93 /*!
  94  * wxRichTextStyleListBox class declaration
  95  * A listbox to display styles.
  96  */
  97
  98 IMPLEMENT_CLASS(wxRichTextStyleListBox, wxHtmlListBox)
  99
 100 BEGIN_EVENT_TABLE(wxRichTextStyleListBox, wxHtmlListBox)
 101     EVT_LISTBOX(wxID_ANY, wxRichTextStyleListBox::OnSelect)
 102     EVT_LEFT_DOWN(wxRichTextStyleListBox::OnLeftDown)
 103 END_EVENT_TABLE()
 104
 105 wxRichTextStyleListBox::wxRichTextStyleListBox(wxWindow* parent, wxWindowID id, const wxPoint& pos,
 106     const wxSize& size, long style): wxHtmlListBox(parent, id, pos, size, style)
 107 {
 108     m_styleSheet = NULL;
 109     m_richTextCtrl = NULL;
 110 }
 111
 112 wxRichTextStyleListBox::~wxRichTextStyleListBox()
 113 {
 114 }
 115
 116 /// Returns the HTML for this item
 117 wxString wxRichTextStyleListBox::OnGetItem(size_t n) const
 118 {
 119     if (!GetStyleSheet())
 120         return wxEmptyString;
 121
 122     // First paragraph styles, then character
 123     if (n < GetStyleSheet()->GetParagraphStyleCount())
 124     {
 125         wxRichTextParagraphStyleDefinition* def = GetStyleSheet()->GetParagraphStyle(n);
 126
 127         wxString str = CreateHTML(def);
 128         return str;
 129     }
 130
 131     if ((n - GetStyleSheet()->GetParagraphStyleCount()) < GetStyleSheet()->GetCharacterStyleCount())
 132     {
 133         wxRichTextCharacterStyleDefinition* def = GetStyleSheet()->GetCharacterStyle(n - GetStyleSheet()->GetParagraphStyleCount());
 134
 135         wxString str = CreateHTML(def);
 136         return str;
 137     }
 138     return wxEmptyString;
 139 }
 140
 141 // Get style for index
 142 wxRichTextStyleDefinition* wxRichTextStyleListBox::GetStyle(size_t i) const
 143 {
 144     if (!GetStyleSheet())
 145         return NULL;
 146
 147     // First paragraph styles, then character
 148     if (i < GetStyleSheet()->GetParagraphStyleCount())
 149         return GetStyleSheet()->GetParagraphStyle(i);
 150
 151     if ((i - GetStyleSheet()->GetParagraphStyleCount()) < GetStyleSheet()->GetCharacterStyleCount())
 152         return GetStyleSheet()->GetCharacterStyle(i - GetStyleSheet()->GetParagraphStyleCount());
 153
 154     return NULL;
 155 }
 156
 157 /// Updates the list
 158 void wxRichTextStyleListBox::UpdateStyles()
 159 {
 160     if (GetStyleSheet())
 161     {
 162         SetItemCount(GetStyleSheet()->GetParagraphStyleCount()+GetStyleSheet()->GetCharacterStyleCount());
 163         Refresh();
 164     }
 165 }
 166
 167 // Convert a colour to a 6-digit hex string
 168 static wxString ColourToHexString(const wxColour& col)
 169 {
 170     wxString hex;
 171
 172     hex += wxDecToHex(col.Red());
 173     hex += wxDecToHex(col.Green());
 174     hex += wxDecToHex(col.Blue());
 175
 176     return hex;
 177 }
 178
 179 /// Creates a suitable HTML fragment for a definition
 180 wxString wxRichTextStyleListBox::CreateHTML(wxRichTextStyleDefinition* def) const
 181 {
 182     wxString str(wxT("<table><tr>"));
 183
 184     if (def->GetStyle().GetLeftIndent() > 0)
 185     {
 186         wxClientDC dc((wxWindow*) this);
 187
 188         str << wxT("<td width=") << ConvertTenthsMMToPixels(dc, def->GetStyle().GetLeftIndent()) << wxT("></td>");
 189     }
 190
 191     str << wxT("<td nowrap>");
 192
 193     int size = 5;
 194
 195     // Standard size is 12, say
 196     size += 12 - def->GetStyle().GetFontSize();
 197
 198     str += wxT("<font");
 199
 200     str << wxT(" size=") << size;
 201
 202     if (!def->GetStyle().GetFontFaceName().IsEmpty())
 203         str << wxT(" face=\"") << def->GetStyle().GetFontFaceName() << wxT("\"");
 204
 205     if (def->GetStyle().GetTextColour().Ok())
 206         str << wxT(" color=\"#") << ColourToHexString(def->GetStyle().GetTextColour()) << wxT("\"");
 207
 208     str << wxT(">");
 209
 210     bool hasBold = false;
 211     bool hasItalic = false;
 212     bool hasUnderline = false;
 213
 214     if (def->GetStyle().GetFontWeight() == wxBOLD)
 215         hasBold = true;
 216     if (def->GetStyle().GetFontStyle() == wxITALIC)
 217         hasItalic = true;
 218     if (def->GetStyle().GetFontUnderlined())
 219         hasUnderline = true;
 220
 221     if (hasBold)
 222         str << wxT("<b>");
 223     if (hasItalic)
 224         str << wxT("<i>");
 225     if (hasUnderline)
 226         str << wxT("<u>");
 227
 228     str += def->GetName();
 229
 230     if (hasUnderline)
 231         str << wxT("</u>");
 232     if (hasItalic)
 233         str << wxT("</i>");
 234     if (hasBold)
 235         str << wxT("</b>");
 236
 237     str << wxT("</font>");
 238
 239     str += wxT("</td></tr></table>");
 240     return str;
 241 }
 242
 243 // Convert units in tends of a millimetre to device units
 244 int wxRichTextStyleListBox::ConvertTenthsMMToPixels(wxDC& dc, int units) const
 245 {
 246     int ppi = dc.GetPPI().x;
 247
 248     // There are ppi pixels in 254.1 "1/10 mm"
 249
 250     double pixels = ((double) units * (double)ppi) / 254.1;
 251
 252     return (int) pixels;
 253 }
 254
 255 /// React to selection
 256 void wxRichTextStyleListBox::OnSelect(wxCommandEvent& WXUNUSED(event))
 257 {
 258 #if 0
 259     wxRichTextStyleDefinition* def = GetStyle(event.GetSelection());
 260     if (def)
 261     {
 262         wxMessageBox(def->GetName());
 263     }
 264 #endif
 265 }
 266
 267 void wxRichTextStyleListBox::OnLeftDown(wxMouseEvent& event)
 268 {
 269     wxVListBox::OnLeftDown(event);
 270
 271     int item = HitTest(event.GetPosition());
 272
 273     if ( item != wxNOT_FOUND )
 274     {
 275         wxRichTextStyleDefinition* def = GetStyle(item);
 276         if (def && GetRichTextCtrl())
 277         {
 278             wxRichTextRange range(m_richTextCtrl->GetInsertionPoint(), m_richTextCtrl->GetInsertionPoint());
 279
 280             // Flags are defined within each definition, so only certain
 281             // attributes are applied.
 282             wxRichTextAttr attr(def->GetStyle());
 283
 284             if (m_richTextCtrl->HasSelection())
 285                 m_richTextCtrl->SetStyle(m_richTextCtrl->GetSelectionRange(), attr);
 286             else
 287                 m_richTextCtrl->SetDefaultStyle(attr);
 288
 289             m_richTextCtrl->SetFocus();
 290         }
 291     }
 292 }
 293
 294 #if 0
 295 wxColour wxRichTextStyleListBox::GetSelectedTextColour(const wxColour& colFg) const
 296 {
 297     return *wxBLACK;
 298 }
 299
 300 wxColour wxRichTextStyleListBox::GetSelectedTextBgColour(const wxColour& colBg) const
 301 {
 302     return *wxWHITE;
 303 }
 304 #endif
 305
 306 #endif
 307     // wxUSE_HTML
 308
 309 #endif
 310     // wxUSE_RICHTEXT
 311