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[lyx.git] / src / insets / InsetHyperlink.cpp
1 /**
2  * \file InsetHyperlink.cpp
3  * This file is part of LyX, the document processor.
4  * Licence details can be found in the file COPYING.
5  *
6  * \author José Matos
7  * \author Uwe Stöhr
8  *
9  * Full author contact details are available in file CREDITS.
10  */
11
12 #include <config.h>
13
14 #include "InsetHyperlink.h"
15
16 #include "DispatchResult.h"
17 #include "FuncRequest.h"
18 #include "LaTeXFeatures.h"
19 #include "OutputParams.h"
20
21 #include "support/docstream.h"
22 #include "support/gettext.h"
23 #include "support/lstrings.h"
24
25 using namespace std;
26 using namespace lyx::support;
27
28 namespace lyx {
29
30
31 InsetHyperlink::InsetHyperlink(InsetCommandParams const & p)
32         : InsetCommand(p, "href")
33 {}
34
35
36 ParamInfo const & InsetHyperlink::findInfo(string const & /* cmdName */)
37 {
38         static ParamInfo param_info_;
39         if (param_info_.empty()) {
40                 param_info_.add("name", ParamInfo::LATEX_OPTIONAL);
41                 param_info_.add("target", ParamInfo::LATEX_REQUIRED);
42                 param_info_.add("type", ParamInfo::LATEX_REQUIRED);
43         }
44         return param_info_;
45 }
46
47
48 docstring InsetHyperlink::screenLabel() const
49 {
50         docstring const temp = from_ascii("Hyperlink: ");
51
52         docstring url;
53
54         url += getParam("name");
55         if (url.empty())
56                 url += getParam("target");
57
58         // elide if long
59         if (url.length() > 30) {
60                 url = url.substr(0, 10) + "..."
61                         + url.substr(url.length() - 17, url.length());
62         }
63         return temp + url;
64 }
65
66
67 int InsetHyperlink::latex(odocstream & os, OutputParams const & runparams) const
68 {
69         docstring url = getParam("target");
70         docstring name = getParam("name");
71         static docstring const backslash = from_ascii("\\");
72         static docstring const braces = from_ascii("{}");
73         static char_type const chars_name[6] = {
74                 '&', '_', '$', '%', '#', '^'};
75
76         // For the case there is no name given, the target is set as name.
77         // Do this before !url.empty() and !name.empty() to handle characters
78         // like the "%" correctly.
79         if (name.empty())
80                 name = url;
81
82         // The characters in chars_url[] need to be changed to a command when
83         // they are in the url field.
84         if (!url.empty()) {
85                 // Replace the "\" character by its ASCII code according to the URL specifications
86                 // because "\" is not allowed in URLs and by \href. Only do this when the
87                 // following character is not also a "\", because "\\" is valid code
88                 for (size_t i = 0, pos;
89                         (pos = url.find('\\', i)) != string::npos;
90                         i = pos + 2) {
91                         if (url[pos + 1] != '\\')
92                                 url.replace(pos, 1, from_ascii("%5C"));
93                 }
94                 
95                 // add "http://" when the type is web (type = empty)
96                 // and no "://" or "run:" is given
97                 docstring type = getParam("type");
98                 if (url.find(from_ascii("://")) == string::npos
99                         && url.find(from_ascii("run:")) == string::npos
100                         && type.empty())
101                         url = from_ascii("http://") + url;
102
103         } // end if (!url.empty())
104
105         // The characters in chars_name[] need to be changed to a command when
106         // they are in the name field.
107         if (!name.empty()) {
108                 // handle the "\" character, but only when the following character
109                 // is not also a "\", because "\\" is valid code
110                 docstring const textbackslash = from_ascii("\\textbackslash{}");
111                 for (size_t i = 0, pos;
112                         (pos = name.find('\\', i)) != string::npos;
113                         i = pos + 2) {
114                         if (name[pos + 1] != '\\')
115                                 name.replace(pos, 1, textbackslash);
116                 }
117                 // The characters in chars_name[] need to be changed to a command when
118                 // they are in the name field.
119                 // Therefore the treatment of "\" must be the first thing
120                 for (int k = 0; k < 6; k++) {
121                         for (size_t i = 0, pos;
122                                 (pos = name.find(chars_name[k], i)) != string::npos;
123                                 i = pos + 2) {
124                                 name.replace(pos, 1, backslash + chars_name[k] + braces);
125                         }
126                 }
127                 // replace the tilde by the \sim character as suggested in the LaTeX FAQ
128                 // for URLs
129                 docstring const sim = from_ascii("$\\sim$");
130                 for (size_t i = 0, pos;
131                         (pos = name.find('~', i)) != string::npos;
132                         i = pos + 1)
133                         name.replace(pos, 1, sim);
134
135         }  // end if (!name.empty())
136         
137         if (runparams.moving_arg)
138                 os << "\\protect";
139
140         // output the ready \href command
141         os << "\\href{" << getParam("type") << url << "}{" << name << '}';
142
143         return 0;
144 }
145
146
147 int InsetHyperlink::plaintext(odocstream & os, OutputParams const &) const
148 {
149         odocstringstream oss;
150
151         oss << '[' << getParam("target");
152         if (getParam("name").empty())
153                 oss << ']';
154         else
155                 oss << "||" << getParam("name") << ']';
156
157         docstring const str = oss.str();
158         os << str;
159         return str.size();
160 }
161
162
163 int InsetHyperlink::docbook(odocstream & os, OutputParams const &) const
164 {
165         os << "<ulink url=\""
166            << subst(getParam("target"), from_ascii("&"), from_ascii("&amp;"))
167            << "\">"
168            << getParam("name")
169            << "</ulink>";
170         return 0;
171 }
172
173
174 void InsetHyperlink::tocString(odocstream & os) const
175 {
176         plaintext(os, OutputParams(0));
177 }
178
179
180 void InsetHyperlink::validate(LaTeXFeatures & features) const
181 {
182         features.require("hyperref");
183 }
184
185
186 } // namespace lyx