src/plugins/litehtml_viewer/litehtml/el_before_after.cpp

   1 #include "html.h"
   2 #include "el_before_after.h"
   3 #include "el_text.h"
   4 #include "el_space.h"
   5 #include "el_image.h"
   6 #include "utf8_strings.h"
   7
   8 litehtml::el_before_after_base::el_before_after_base(const std::shared_ptr<document>& doc, bool before) : html_tag(doc)
   9 {
  10         m_tag = before ? __tag_before_ : __tag_after_;
  11 }
  12
  13 void litehtml::el_before_after_base::add_style(const style& style)
  14 {
  15         html_tag::add_style(style);
  16
  17         auto children = m_children;
  18         m_children.clear();
  19
  20         const auto& content_property = style.get_property(_content_);
  21         if(content_property.m_type == prop_type_string && !content_property.m_string.empty())
  22         {
  23                 int idx = value_index(content_property.m_string, content_property_string);
  24                 if(idx < 0)
  25                 {
  26                         string fnc;
  27                         string::size_type i = 0;
  28                         while(i < content_property.m_string.length() && i != string::npos)
  29                         {
  30                                 if(content_property.m_string.at(i) == '"' || content_property.m_string.at(i) == '\'')
  31                                 {
  32                     auto chr = content_property.m_string.at(i);
  33                                         fnc.clear();
  34                                         i++;
  35                                         string::size_type pos = content_property.m_string.find(chr, i);
  36                                         string txt;
  37                                         if(pos == string::npos)
  38                                         {
  39                                                 txt = content_property.m_string.substr(i);
  40                                                 i = string::npos;
  41                                         } else
  42                                         {
  43                                                 txt = content_property.m_string.substr(i, pos - i);
  44                                                 i = pos + 1;
  45                                         }
  46                                         add_text(txt);
  47                                 } else if(content_property.m_string.at(i) == '(')
  48                                 {
  49                                         i++;
  50                                         litehtml::trim(fnc);
  51                                         litehtml::lcase(fnc);
  52                                         string::size_type pos = content_property.m_string.find(')', i);
  53                                         string params;
  54                                         if(pos == string::npos)
  55                                         {
  56                                                 params = content_property.m_string.substr(i);
  57                                                 i = string::npos;
  58                                         } else
  59                                         {
  60                                                 params = content_property.m_string.substr(i, pos - i);
  61                                                 i = pos + 1;
  62                                         }
  63                                         add_function(fnc, params);
  64                                         fnc.clear();
  65                                 } else
  66                                 {
  67                                         fnc += content_property.m_string.at(i);
  68                                         i++;
  69                                 }
  70                         }
  71                 }
  72         }
  73
  74         if(m_children.empty())
  75         {
  76                 m_children = children;
  77         }
  78 }
  79
  80 void litehtml::el_before_after_base::add_text( const string& txt )
  81 {
  82         string word;
  83         string esc;
  84
  85         for(auto chr : txt)
  86         {
  87                 if(chr == '\\' ||
  88                         !esc.empty() && esc.length() < 5 && (chr >= '0' && chr <= '9' || chr >= 'A' && chr <= 'Z' || chr >= 'a' && chr <= 'z'))
  89                 {
  90                         if(!esc.empty() && chr == '\\')
  91                         {
  92                                 word += convert_escape(esc.c_str() + 1);
  93                                 esc.clear();
  94                         }
  95                         esc += chr;
  96                 } else
  97                 {
  98                         if(!esc.empty())
  99                         {
 100                                 word += convert_escape(esc.c_str() + 1);
 101                                 esc.clear();
 102                         }
 103                         if(isspace(chr))
 104                         {
 105                                 if(!word.empty())
 106                                 {
 107                                         element::ptr el = std::make_shared<el_text>(word.c_str(), get_document());
 108                                         appendChild(el);
 109                                         word.clear();
 110                                 }
 111                                 word += chr;
 112                                 element::ptr el = std::make_shared<el_space>(word.c_str(), get_document());
 113                                 appendChild(el);
 114                                 word.clear();
 115                         } else
 116                         {
 117                                 word += chr;
 118                         }
 119                 }
 120         }
 121
 122         if(!esc.empty())
 123         {
 124                 word += convert_escape(esc.c_str() + 1);
 125         }
 126         if(!word.empty())
 127         {
 128                 element::ptr el = std::make_shared<el_text>(word.c_str(), get_document());
 129                 appendChild(el);
 130                 word.clear();
 131         }
 132 }
 133
 134 void litehtml::el_before_after_base::add_function( const string& fnc, const string& params )
 135 {
 136         int idx = value_index(fnc, "attr;counter;url");
 137         switch(idx)
 138         {
 139         // attr
 140         case 0:
 141                 {
 142                         string p_name = params;
 143                         trim(p_name);
 144                         lcase(p_name);
 145                         element::ptr el_parent = parent();
 146                         if (el_parent)
 147                         {
 148                                 const char* attr_value = el_parent->get_attr(p_name.c_str());
 149                                 if (attr_value)
 150                                 {
 151                                         add_text(attr_value);
 152                                 }
 153                         }
 154                 }
 155                 break;
 156         // counter
 157         case 1:
 158                 break;
 159         // url
 160         case 2:
 161                 {
 162                         string p_url = params;
 163                         trim(p_url);
 164                         if(!p_url.empty())
 165                         {
 166                                 if(p_url.at(0) == '\'' || p_url.at(0) == '\"')
 167                                 {
 168                                         p_url.erase(0, 1);
 169                                 }
 170                         }
 171                         if(!p_url.empty())
 172                         {
 173                                 if(p_url.at(p_url.length() - 1) == '\'' || p_url.at(p_url.length() - 1) == '\"')
 174                                 {
 175                                         p_url.erase(p_url.length() - 1, 1);
 176                                 }
 177                         }
 178                         if(!p_url.empty())
 179                         {
 180                                 element::ptr el = std::make_shared<el_image>(get_document());
 181                                 el->set_attr("src", p_url.c_str());
 182                                 el->set_attr("style", "display:inline-block");
 183                                 el->set_tagName("img");
 184                                 appendChild(el);
 185                                 el->parse_attributes();
 186                         }
 187                 }
 188                 break;
 189         }
 190 }
 191
 192 litehtml::string litehtml::el_before_after_base::convert_escape( const char* txt )
 193 {
 194     char* str_end;
 195         wchar_t u_str[2];
 196     u_str[0] = (wchar_t) strtol(txt, &str_end, 16);
 197     u_str[1] = 0;
 198         return litehtml::string(litehtml_from_wchar(u_str));
 199 }