X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c7a49742ec6b4effe012dc7204db307e1267bf6a..4e15d1caa03346c126015019c1fdf093033ef40b:/src/gtk/font.cpp?ds=inline

diff --git a/src/gtk/font.cpp b/src/gtk/font.cpp
index 1ae79d7eb7..f2e48c3ca8 100644
--- a/src/gtk/font.cpp
+++ b/src/gtk/font.cpp
@@ -92,9 +92,8 @@ protected:
     void InitFromNative();
 
 private:
-    bool            m_underlined;
-    bool            m_strikethrough;
-    // The native font info: basically a PangoFontDescription
+    // The native font info: basically a PangoFontDescription, plus
+    // 'underlined' and 'strikethrough' attributes not supported by Pango.
     wxNativeFontInfo m_nativeFontInfo;
 
     friend class wxFont;
@@ -118,9 +117,6 @@ void wxFontRefData::Init(int pointSize,
     if (family == wxFONTFAMILY_DEFAULT)
         family = wxFONTFAMILY_SWISS;
 
-    m_underlined = underlined;
-    m_strikethrough = strikethrough;
-
     // Create native font info
     m_nativeFontInfo.description = pango_font_description_new();
 
@@ -140,6 +136,8 @@ void wxFontRefData::Init(int pointSize,
                     ? wxDEFAULT_FONT_SIZE
                     : pointSize );
     SetWeight( weight == wxDEFAULT ? wxFONTWEIGHT_NORMAL : weight );
+    SetUnderlined( underlined );
+    SetStrikethrough( strikethrough );
 }
 
 void wxFontRefData::InitFromNative()
@@ -151,18 +149,11 @@ void wxFontRefData::InitFromNative()
     int pango_size = pango_font_description_get_size( desc );
     if (pango_size == 0)
         m_nativeFontInfo.SetPointSize(wxDEFAULT_FONT_SIZE);
-
-    // Pango description are never underlined
-    m_underlined = false;
-    m_strikethrough = false;
 }
 
 wxFontRefData::wxFontRefData( const wxFontRefData& data )
              : wxGDIRefData()
 {
-    m_underlined = data.m_underlined;
-    m_strikethrough = data.m_strikethrough;
-
     // Forces a copy of the internal data.  wxNativeFontInfo should probably
     // have a copy ctor and assignment operator to fix this properly but that
     // would break binary compatibility...
@@ -243,17 +234,12 @@ void wxFontRefData::SetWeight(wxFontWeight weight)
 
 void wxFontRefData::SetUnderlined(bool underlined)
 {
-    m_underlined = underlined;
-
-    // the Pango font descriptor does not have an underlined attribute
-    // (and wxNativeFontInfo::SetUnderlined asserts); rather it's
-    // wxWindowDCImpl::DoDrawText that handles underlined fonts, so we
-    // here we just need to save the underlined attribute
+    m_nativeFontInfo.SetUnderlined(underlined);
 }
 
 void wxFontRefData::SetStrikethrough(bool strikethrough)
 {
-    m_strikethrough = strikethrough;
+    m_nativeFontInfo.SetStrikethrough(strikethrough);
 }
 
 bool wxFontRefData::SetFaceName(const wxString& facename)
@@ -287,6 +273,9 @@ wxFont::wxFont(const wxNativeFontInfo& info)
             info.GetUnderlined(),
             info.GetFaceName(),
             info.GetEncoding() );
+
+    if ( info.GetStrikethrough() )
+        SetStrikethrough(true);
 }
 
 wxFont::wxFont(int pointSize,
@@ -299,7 +288,8 @@ wxFont::wxFont(int pointSize,
                                   GetStyleFromFlags(flags),
                                   GetWeightFromFlags(flags),
                                   GetUnderlinedFromFlags(flags),
-                                  false, face, encoding);
+                                  GetStrikethroughFromFlags(flags),
+                                  face, encoding);
 }
 
 bool wxFont::Create( int pointSize,
@@ -378,14 +368,14 @@ bool wxFont::GetUnderlined() const
 {
     wxCHECK_MSG( IsOk(), false, wxT("invalid font") );
 
-    return M_FONTDATA->m_underlined;
+    return M_FONTDATA->m_nativeFontInfo.GetUnderlined();
 }
 
 bool wxFont::GetStrikethrough() const
 {
     wxCHECK_MSG( IsOk(), false, wxT("invalid font") );
 
-    return M_FONTDATA->m_strikethrough;
+    return M_FONTDATA->m_nativeFontInfo.GetStrikethrough();
 }
 
 wxFontEncoding wxFont::GetEncoding() const
@@ -487,3 +477,66 @@ wxGDIRefData* wxFont::CloneGDIRefData(const wxGDIRefData* data) const
 {
     return new wxFontRefData(*static_cast<const wxFontRefData*>(data));
 }
+
+bool wxFont::GTKSetPangoAttrs(PangoLayout* layout) const
+{
+    if (!IsOk() || !(GetUnderlined() || GetStrikethrough()))
+        return false;
+
+    PangoAttrList* attrs = pango_attr_list_new();
+    PangoAttribute* a;
+
+    if (wx_pango_version_check(1,16,0))
+    {
+        // a PangoLayout which has leading/trailing spaces with underlined font
+        // is not correctly drawn by this pango version: Pango won't underline the spaces.
+        // This can be a problem; e.g. wxHTML rendering of underlined text relies on
+        // this behaviour. To workaround this problem, we use a special hack here
+        // suggested by pango maintainer Behdad Esfahbod: we prepend and append two
+        // empty space characters and give them a dummy colour attribute.
+        // This will force Pango to underline the leading/trailing spaces, too.
+
+        const char* text = pango_layout_get_text(layout);
+        const size_t n = strlen(text);
+        if ((n > 0 && text[0] == ' ') || (n > 1 && text[n - 1] == ' '))
+        {
+            wxCharBuffer buf(n + 6);
+            // copy the leading U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
+            memcpy(buf.data(), "\342\200\214", 3);
+            // copy the user string
+            memcpy(buf.data() + 3, text, n);
+            // copy the trailing U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
+            memcpy(buf.data() + 3 + n, "\342\200\214", 3);
+
+            pango_layout_set_text(layout, buf, n + 6);
+
+            // Add dummy attributes (use colour as it's invisible anyhow for 0
+            // width spaces) to ensure that the spaces in the beginning/end of the
+            // string are underlined too.
+            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
+            a->start_index = 0;
+            a->end_index = 3;
+            pango_attr_list_insert(attrs, a);
+
+            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
+            a->start_index = n + 3;
+            a->end_index = n + 6;
+            pango_attr_list_insert(attrs, a);
+        }
+    }
+    if (GetUnderlined())
+    {
+        a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
+        pango_attr_list_insert(attrs, a);
+    }
+    if (GetStrikethrough())
+    {
+        a = pango_attr_strikethrough_new(true);
+        pango_attr_list_insert(attrs, a);
+    }
+
+    pango_layout_set_attributes(layout, attrs);
+    pango_attr_list_unref(attrs);
+
+    return true;
+}