1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*
Ousía
Copyright (C) 2014 Benjamin Paaßen, Andreas Stöckel
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <core/common/Exceptions.hpp>
#include <core/common/Rtti.hpp>
#include <core/common/Variant.hpp>
#include "DemoOutput.hpp"
namespace ousia {
namespace html {
void DemoHTMLTransformer::writeHTML(Handle<model::Document> doc,
std::ostream &out)
{
Manager &mgr = doc->getManager();
// Create an XML object tree for the document first.
Rooted<xml::Element> html{new xml::Element{mgr, "html"}};
// add the head Element
Rooted<xml::Element> head{new xml::Element{mgr, "head"}};
html->children.push_back(head);
// add the title Element with Text
Rooted<xml::Element> title{new xml::Element{mgr, "title"}};
head->children.push_back(title);
title->children.push_back(
new xml::Text(mgr, "Test HTML Output for " + doc->getName()));
// add the body Element
Rooted<xml::Element> body{new xml::Element{mgr, "body"}};
html->children.push_back(body);
// So far was the "preamble". No we have to get to the document content.
// extract the book root node.
Rooted<model::StructuredEntity> root = doc->getRoot();
if (root->getDescriptor()->getName() != "book") {
throw OusiaException("The given documents root is no book node!");
}
// transform the book node.
Rooted<xml::Element> book = transformSection(root);
// add it as child to the body node.
body->children.push_back(book);
// After the content has been transformed, we serialize it.
html->serialize(out);
}
/**
* This is just for easier internal handling.
*/
enum class SectionType { BOOK, CHAPTER, SECTION, SUBSECTION, NONE };
SectionType getSectionType(const std::string &name)
{
if (name == "book") {
return SectionType::BOOK;
} else if (name == "chapter") {
return SectionType::CHAPTER;
} else if (name == "section") {
return SectionType::SECTION;
} else if (name == "subsection") {
return SectionType::SUBSECTION;
} else {
return SectionType::NONE;
}
}
Rooted<xml::Element> DemoHTMLTransformer::transformSection(Handle<model::StructuredEntity> section)
{
Manager &mgr = section->getManager();
// check the section type.
const std::string secclass = section->getDescriptor()->getName();
SectionType type = getSectionType(secclass);
if (type == SectionType::NONE) {
// if the input node is no section, we ignore it.
return {nullptr};
}
// create a div tag containing the sections content.
Rooted<xml::Element> sec{
new xml::Element{mgr, "div", {{"class", secclass}}}};
// check if we have a heading.
if (section->hasField("heading")) {
Rooted<model::StructuredEntity> heading =
section->getField("heading")[0];
std::string headingclass;
switch (type) {
case SectionType::BOOK:
headingclass = "h1";
break;
case SectionType::CHAPTER:
headingclass = "h2";
break;
case SectionType::SECTION:
headingclass = "h3";
break;
case SectionType::SUBSECTION:
headingclass = "h4";
break;
case SectionType::NONE:
// this can not happen;
break;
}
Rooted<xml::Element> h{new xml::Element{mgr, headingclass}};
sec->children.push_back(h);
// extract the heading text, enveloped in a paragraph Element.
Rooted<xml::Element> h_content = transformParagraph(heading);
// We omit the paragraph Element and add the children directly to the
// heading Element
for (auto &n : h_content->children) {
h->children.push_back(n);
}
}
// Then we get all the children.
NodeVector<model::StructuredEntity> mainField = section->getField();
for (auto &n : mainField) {
/*
* Strictly speaking this is the wrong mechanism, because we would have
* to make an "isa" call here because we can not rely on our knowledge
* that paragraphs can only be paragraphs or lists. There would have
* to be a listener structure of transformations that check if they can
* transform this specific node.
*/
const std::string childDescriptorName = n->getDescriptor()->getName();
Rooted<xml::Element> child;
if (childDescriptorName == "paragraph") {
child = transformParagraph(n);
// TODO: Implement
// } else if(childDescriptorName == "ul"){
// writeList(n, out);
} else {
child = transformSection(n);
}
if (!child.isNull()) {
sec->children.push_back(child);
}
}
return sec;
}
Rooted<xml::Element> DemoHTMLTransformer::transformParagraph(Handle<model::StructuredEntity> par)
{
Manager &mgr = par->getManager();
// create the p xml::Element
Rooted<xml::Element> p{new xml::Element{mgr, "p"}};
// check if we have a heading.
if (par->hasField("heading")) {
Rooted<model::StructuredEntity> heading = par->getField("heading")[0];
// put the heading in a strong xml::Element.
Rooted<xml::Element> strong{new xml::Element{mgr, "strong"}};
p->children.push_back(strong);
// extract the heading text, enveloped in a paragraph Element.
Rooted<xml::Element> h_content = transformParagraph(heading);
// We omit the paragraph Element and add the children directly to the
// heading Element
for (auto &n : h_content->children) {
strong->children.push_back(n);
}
}
// transform paragraph children to XML as well
for (auto &n : par->getField()) {
std::string childDescriptorName = n->getDescriptor()->getName();
if (childDescriptorName == "text") {
Handle<model::DocumentPrimitive> primitive =
n->getField()[0].cast<model::DocumentPrimitive>();
if (primitive.isNull()) {
throw OusiaException("Text field is not primitive!");
}
p->children.push_back(
new xml::Text(mgr, primitive->getContent().asString()));
}
// TODO: Handle non-text content
}
return p;
}
}
}
|
