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 #ifndef WX_PRECOMP
  20   #include "wx/wx.h"
  21 #endif
  22
  23 #include "wx/image.h"
  24
  25 #if wxUSE_RICHTEXT
  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/richtextstyles.h"
  33 #include "wx/richtext/richtextctrl.h"
  34
  35 IMPLEMENT_CLASS(wxRichTextStyleDefinition, wxObject)
  36 IMPLEMENT_CLASS(wxRichTextCharacterStyleDefinition, wxRichTextStyleDefinition)
  37 IMPLEMENT_CLASS(wxRichTextParagraphStyleDefinition, wxRichTextStyleDefinition)
  38
  39 /*!
  40  * The style manager
  41  */
  42
  43 IMPLEMENT_CLASS(wxRichTextStyleSheet, wxObject)
  44
  45 /// Initialisation
  46 void wxRichTextStyleSheet::Init()
  47 {
  48 }
  49
  50 /// Add a definition to one of the style lists
  51 bool wxRichTextStyleSheet::AddStyle(wxList& list, wxRichTextStyleDefinition* def)
  52 {
  53     if (!list.Find(def))
  54         list.Append(def);
  55     return true;
  56 }
  57
  58 /// Remove a style
  59 bool wxRichTextStyleSheet::RemoveStyle(wxList& list, wxRichTextStyleDefinition* def, bool deleteStyle)
  60 {
  61     wxList::compatibility_iterator node = list.Find(def);
  62     if (node)
  63     {
  64         wxRichTextStyleDefinition* def = (wxRichTextStyleDefinition*) node->GetData();
  65         list.Erase(node);
  66         if (deleteStyle)
  67             delete def;
  68         return true;
  69     }
  70     else
  71         return false;
  72 }
  73
  74 /// Find a definition by name
  75 wxRichTextStyleDefinition* wxRichTextStyleSheet::FindStyle(const wxList& list, const wxString& name) const
  76 {
  77     for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
  78     {
  79         wxRichTextStyleDefinition* def = (wxRichTextStyleDefinition*) node->GetData();
  80         if (def->GetName().Lower() == name.Lower())
  81             return def;
  82     }
  83     return NULL;
  84 }
  85
  86 /// Delete all styles
  87 void wxRichTextStyleSheet::DeleteStyles()
  88 {
  89     WX_CLEAR_LIST(wxList, m_characterStyleDefinitions);
  90     WX_CLEAR_LIST(wxList, m_paragraphStyleDefinitions);
  91 }
  92
  93 #if wxUSE_HTML
  94 /*!
  95  * wxRichTextStyleListBox class declaration
  96  * A listbox to display styles.
  97  */
  98
  99 IMPLEMENT_CLASS(wxRichTextStyleListBox, wxHtmlListBox)
 100
 101 BEGIN_EVENT_TABLE(wxRichTextStyleListBox, wxHtmlListBox)
 102     EVT_LISTBOX(wxID_ANY, wxRichTextStyleListBox::OnSelect)
 103     EVT_LEFT_DOWN(wxRichTextStyleListBox::OnLeftDown)
 104 END_EVENT_TABLE()
 105
 106 wxRichTextStyleListBox::wxRichTextStyleListBox(wxWindow* parent, wxWindowID id, const wxPoint& pos,
 107     const wxSize& size, long style): wxHtmlListBox(parent, id, pos, size, style)
 108 {
 109     m_styleSheet = NULL;
 110     m_richTextCtrl = NULL;
 111 }
 112
 113 wxRichTextStyleListBox::~wxRichTextStyleListBox()
 114 {
 115 }
 116
 117 /// Returns the HTML for this item
 118 wxString wxRichTextStyleListBox::OnGetItem(size_t n) const
 119 {
 120     if (!GetStyleSheet())
 121         return wxEmptyString;
 122
 123     // First paragraph styles, then character
 124     if (n < GetStyleSheet()->GetParagraphStyleCount())
 125     {
 126         wxRichTextParagraphStyleDefinition* def = GetStyleSheet()->GetParagraphStyle(n);
 127
 128         wxString str = CreateHTML(def);
 129         return str;
 130     }
 131
 132     if ((n - GetStyleSheet()->GetParagraphStyleCount()) < GetStyleSheet()->GetCharacterStyleCount())
 133     {
 134         wxRichTextCharacterStyleDefinition* def = GetStyleSheet()->GetCharacterStyle(n - GetStyleSheet()->GetParagraphStyleCount());
 135
 136         wxString str = CreateHTML(def);
 137         return str;
 138     }
 139     return wxEmptyString;
 140 }
 141
 142 // Get style for index
 143 wxRichTextStyleDefinition* wxRichTextStyleListBox::GetStyle(size_t i) const
 144 {
 145     if (!GetStyleSheet())
 146         return NULL;
 147
 148     // First paragraph styles, then character
 149     if (i < GetStyleSheet()->GetParagraphStyleCount())
 150         return GetStyleSheet()->GetParagraphStyle(i);
 151
 152     if ((i - GetStyleSheet()->GetParagraphStyleCount()) < GetStyleSheet()->GetCharacterStyleCount())
 153         return GetStyleSheet()->GetCharacterStyle(i - GetStyleSheet()->GetParagraphStyleCount());
 154
 155     return NULL;
 156 }
 157
 158 /// Updates the list
 159 void wxRichTextStyleListBox::UpdateStyles()
 160 {
 161     if (GetStyleSheet())
 162     {
 163         SetItemCount(GetStyleSheet()->GetParagraphStyleCount()+GetStyleSheet()->GetCharacterStyleCount());
 164         Refresh();
 165     }
 166 }
 167
 168 // Convert a colour to a 6-digit hex string
 169 static wxString ColourToHexString(const wxColour& col)
 170 {
 171     wxString hex;
 172
 173     hex += wxDecToHex(col.Red());
 174     hex += wxDecToHex(col.Green());
 175     hex += wxDecToHex(col.Blue());
 176
 177     return hex;
 178 }
 179
 180 /// Creates a suitable HTML fragment for a definition
 181 wxString wxRichTextStyleListBox::CreateHTML(wxRichTextStyleDefinition* def) const
 182 {
 183     wxString str(wxT("<table><tr>"));
 184
 185     if (def->GetStyle().GetLeftIndent() > 0)
 186     {
 187         wxClientDC dc((wxWindow*) this);
 188
 189         str << wxT("<td width=") << ConvertTenthsMMToPixels(dc, def->GetStyle().GetLeftIndent()) << wxT("></td>");
 190     }
 191
 192     str << wxT("<td nowrap>");
 193
 194     int size = 5;
 195
 196     // Standard size is 12, say
 197     size += 12 - def->GetStyle().GetFontSize();
 198
 199     str += wxT("<font");
 200
 201     str << wxT(" size=") << size;
 202
 203     if (!def->GetStyle().GetFontFaceName().IsEmpty())
 204         str << wxT(" face=\"") << def->GetStyle().GetFontFaceName() << wxT("\"");
 205
 206     if (def->GetStyle().GetTextColour().Ok())
 207         str << wxT(" color=\"#") << ColourToHexString(def->GetStyle().GetTextColour()) << wxT("\"");
 208
 209     str << wxT(">");
 210
 211     bool hasBold = false;
 212     bool hasItalic = false;
 213     bool hasUnderline = false;
 214
 215     if (def->GetStyle().GetFontWeight() == wxBOLD)
 216         hasBold = true;
 217     if (def->GetStyle().GetFontStyle() == wxITALIC)
 218         hasItalic = true;
 219     if (def->GetStyle().GetFontUnderlined())
 220         hasUnderline = true;
 221
 222     if (hasBold)
 223         str << wxT("<b>");
 224     if (hasItalic)
 225         str << wxT("<i>");
 226     if (hasUnderline)
 227         str << wxT("<u>");
 228
 229     str += def->GetName();
 230
 231     if (hasUnderline)
 232         str << wxT("</u>");
 233     if (hasItalic)
 234         str << wxT("</i>");
 235     if (hasBold)
 236         str << wxT("</b>");
 237
 238     str << wxT("</font>");
 239
 240     str += wxT("</td></tr></table>");
 241     return str;
 242 }
 243
 244 // Convert units in tends of a millimetre to device units
 245 int wxRichTextStyleListBox::ConvertTenthsMMToPixels(wxDC& dc, int units) const
 246 {
 247     int ppi = dc.GetPPI().x;
 248
 249     // There are ppi pixels in 254.1 "1/10 mm"
 250
 251     double pixels = ((double) units * (double)ppi) / 254.1;
 252
 253     return (int) pixels;
 254 }
 255
 256 /// React to selection
 257 void wxRichTextStyleListBox::OnSelect(wxCommandEvent& WXUNUSED(event))
 258 {
 259 #if 0
 260     wxRichTextStyleDefinition* def = GetStyle(event.GetSelection());
 261     if (def)
 262     {
 263         wxMessageBox(def->GetName());
 264     }
 265 #endif
 266 }
 267
 268 void wxRichTextStyleListBox::OnLeftDown(wxMouseEvent& event)
 269 {
 270     wxVListBox::OnLeftDown(event);
 271
 272     int item = HitTest(event.GetPosition());
 273
 274     if ( item != wxNOT_FOUND )
 275     {
 276         wxRichTextStyleDefinition* def = GetStyle(item);
 277         if (def && GetRichTextCtrl())
 278         {
 279             wxRichTextRange range(m_richTextCtrl->GetInsertionPoint(), m_richTextCtrl->GetInsertionPoint());
 280
 281             // Flags are defined within each definition, so only certain
 282             // attributes are applied.
 283             wxRichTextAttr attr(def->GetStyle());
 284
 285             if (m_richTextCtrl->HasSelection())
 286                 m_richTextCtrl->SetStyle(m_richTextCtrl->GetSelectionRange(), attr);
 287             else
 288                 m_richTextCtrl->SetDefaultStyle(attr);
 289
 290             m_richTextCtrl->SetFocus();
 291         }
 292     }
 293 }
 294
 295 #if 0
 296 wxColour wxRichTextStyleListBox::GetSelectedTextColour(const wxColour& colFg) const
 297 {
 298     return *wxBLACK;
 299 }
 300
 301 wxColour wxRichTextStyleListBox::GetSelectedTextBgColour(const wxColour& colBg) const
 302 {
 303     return *wxWHITE;
 304 }
 305 #endif
 306
 307 #endif
 308     // wxUSE_HTML
 309
 310 #endif
 311     // wxUSE_RICHTEXT
 312