From 2c12c0652d2b8c8440e1e908f004826840ed14ab Mon Sep 17 00:00:00 2001
From: Aleksey Veresov <aleksey@veresov.pro>
Date: Fri, 18 Oct 2019 17:33:06 +0300
Subject: [texo] Semi-working.

---
 Makefile                   |   2 +-
 examples/Makefile          |   2 +-
 examples/plain_to_html.cpp |   9 +--
 src/html.cpp               | 173 ++++++++++++++++++++++++++++++++++++++++++++
 src/html.hpp               |  21 +++++-
 src/importer.cpp           |  21 ++++++
 src/importer.hpp           |  16 +++++
 src/plain.cpp              | 174 +++++++++++++++++++++++++++++++++++++++++++++
 src/plain.hpp              |  36 +++++++++-
 src/producer.cpp           |  25 +++++++
 src/producer.hpp           |  30 ++++++++
 src/texo.cpp               |  31 ++++++++
 src/texo.hpp               |  82 +++++++++++++++++++++
 13 files changed, 614 insertions(+), 8 deletions(-)

diff --git a/Makefile b/Makefile
index 7a0491a..0d85446 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # Debug mode:
-# DEBUG   = yes
+DEBUG   = yes
 
 CC        = g++
 LIB       = libtexo.a
diff --git a/examples/Makefile b/examples/Makefile
index d288391..1959b4b 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -1,5 +1,5 @@
 # Uncomment following to enable debug mode:
-# DEBUG    = yes
+DEBUG    = yes
 
 CC        = g++
 EXAMPLES  = plain_to_html
diff --git a/examples/plain_to_html.cpp b/examples/plain_to_html.cpp
index 9a81652..d123a84 100644
--- a/examples/plain_to_html.cpp
+++ b/examples/plain_to_html.cpp
@@ -2,14 +2,15 @@
 #include <html.hpp>
 #include <plain.hpp>
 #include <file.hpp>
+#include <scrvar.hpp>
 
 
 int main()
 {
-    TexoFileExporter exporter(stdout);
-    TexoHTMLProducer producer(exporter);
-    TexoPlainImporter importer(producer);
-    importer.PutStr(
+    TexoExporterFile exporter(stdout);
+    TexoProducerHTML producer(exporter);
+    TexoImporterPlain importer(producer);
+    importer.Put(
         "I am a little cute line. \n"
         "I am another and that's fine. \n"
         "But I am as long as a pine,\n"
diff --git a/src/html.cpp b/src/html.cpp
index 290891e..5155661 100644
--- a/src/html.cpp
+++ b/src/html.cpp
@@ -1 +1,174 @@
 #include "html.hpp"
+
+
+TexoProducerHTML::TexoProducerHTML(TexoExporter &exporter):
+    TexoProducer(exporter)
+{}
+
+void TexoProducerHTML::Put(const Texo &piece)
+{
+    switch (piece.c) {
+    case '<': exporter.Put("&lt;");  break;
+    case '>': exporter.Put("&gt;");  break;
+    default:  exporter.Put(piece.c); break;
+    }
+}
+
+void TexoProducerHTML::Put(const TexoHeader &piece)
+{
+    exporter.Put('<');
+    if (piece.closing) {
+        exporter.Put('/');
+    }
+    if (piece.level <= 1) {
+        exporter.Put("h6>");
+    } else if (piece.level == 2) {
+        exporter.Put("h5>");
+    } else if (piece.level == 3) {
+        exporter.Put("h4>");
+    } else if (piece.level == 4) {
+        exporter.Put("h3>");
+    } else if (piece.level == 5) {
+        exporter.Put("h2>");
+    } else {
+        exporter.Put("h1>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoParagraph &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</p>");
+    } else {
+        exporter.Put("<p>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoCode &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</pre>");
+    } else {
+        exporter.Put("<pre>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoQuote &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</p></blockquote>");
+    } else {
+        exporter.Put("<blockquote><p>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoMono &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</code>");
+    } else {
+        exporter.Put("<code>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoBold &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</b>");
+    } else {
+        exporter.Put("<b>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoItalic &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</i>");
+    } else {
+        exporter.Put("<i>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoUnderline &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</ins>");
+    } else {
+        exporter.Put("<ins>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoStrike &piece)
+{
+    if (piece.closing) {
+        exporter.Put("</del>");
+    } else {
+        exporter.Put("<del>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoImage &piece)
+{
+    if (piece.path != "") {
+        bool link  = piece.link != "";
+        bool title = piece.title != "";
+        if (link) {
+            exporter.Put("<a href='");
+            exporter.Put(piece.link);
+            if (title) {
+                exporter.Put("' title='");
+                exporter.Put(piece.title);
+            }
+            exporter.Put("'>");
+        }
+        exporter.Put("<img src='");
+        exporter.Put(piece.path);
+        if (piece.alt != "") {
+            exporter.Put("' alt='");
+            exporter.Put(piece.alt);
+        }
+        if (title) {
+            exporter.Put("' title='");
+            exporter.Put(piece.title);
+        }
+        exporter.Put("'/>");
+        if (link) {
+            exporter.Put("</a>");
+        }
+    }
+}
+
+void TexoProducerHTML::Put(const TexoLink &piece)
+{
+    if (piece.text != "" && piece.link != "") {
+        exporter.Put("<a href='");
+        exporter.Put(piece.link);
+        if (piece.title != "") {
+            exporter.Put("' title='");
+            exporter.Put(piece.title);
+        }
+        exporter.Put("'>");
+        exporter.Put(piece.text);
+        exporter.Put("</a>");
+    }
+}
+
+void TexoProducerHTML::Put(const TexoLineBreak &piece)
+{
+    exporter.Put("<br/>");
+}
+
+void TexoProducerHTML::Put(const TexoHorizontalRule &piece)
+{
+    exporter.Put("<hr/>");
+}
+
+
+TexoImporterHTML::TexoImporterHTML(TexoProducer &producer):
+    TexoImporter(producer)
+{}
+
+void TexoImporterHTML::Put(char c)
+{  // TODO
+    producer.Put(Texo(c));
+}
diff --git a/src/html.hpp b/src/html.hpp
index a904d56..dc291f6 100644
--- a/src/html.hpp
+++ b/src/html.hpp
@@ -4,18 +4,37 @@
 #include "exporter.hpp"
 #include "producer.hpp"
 #include "importer.hpp"
-#include "texo.hpp"
 
 
 class TexoProducerHTML: public TexoProducer {
 public:
     TexoProducerHTML(TexoExporter &exporter);
+
+    void Put(const Texo &piece);
+
+    void Put(const TexoHeader &piece);
+    void Put(const TexoParagraph &piece);
+    void Put(const TexoCode &piece);
+    void Put(const TexoQuote &piece);
+
+    void Put(const TexoMono &piece);
+    void Put(const TexoBold &piece);
+    void Put(const TexoItalic &piece);
+    void Put(const TexoUnderline &piece);
+    void Put(const TexoStrike &piece);
+
+    void Put(const TexoImage &piece);
+    void Put(const TexoLink &piece);
+    void Put(const TexoLineBreak &piece);
+    void Put(const TexoHorizontalRule &piece);
 };
 
 
 class TexoImporterHTML: public TexoImporter {
 public:
     TexoImporterHTML(TexoProducer &producer);
+
+    void Put(char c);
 };
 
 
diff --git a/src/importer.cpp b/src/importer.cpp
index cb8d62e..73f23e6 100644
--- a/src/importer.cpp
+++ b/src/importer.cpp
@@ -1 +1,22 @@
 #include "importer.hpp"
+
+
+TexoImporter::TexoImporter(TexoProducer &producer): producer(producer)
+{}
+
+void TexoImporter::Put(const ScriptVariable &str)
+{
+    const int len = str.Length();
+    for (int i = 0; i < len; ++i) {
+        Put(str[i]);
+    }
+}
+
+void TexoImporter::Put(FILE *file)
+{
+    if (file) {
+        for (int c = fgetc(file); c != EOF; c = fgetc(file)) {
+            Put(c);
+        }
+    }
+}
diff --git a/src/importer.hpp b/src/importer.hpp
index 81a3b59..915416c 100644
--- a/src/importer.hpp
+++ b/src/importer.hpp
@@ -1,5 +1,21 @@
 #ifndef TEXO_INCLUDED_IMPORTER
 #define TEXO_INCLUDED_IMPORTER
 
+#include "producer.hpp"
+#include <stdio.h>
+
+
+class TexoImporter {
+public:
+    TexoImporter(TexoProducer &producer);
+
+    virtual void Put(char c) = 0;
+    virtual void Put(const ScriptVariable &str);
+    virtual void Put(FILE *file);
+
+protected:
+    TexoProducer &producer;
+};
+
 
 #endif
diff --git a/src/plain.cpp b/src/plain.cpp
index b510d58..bff9398 100644
--- a/src/plain.cpp
+++ b/src/plain.cpp
@@ -1 +1,175 @@
 #include "plain.hpp"
+
+
+TexoProducerPlain::TexoProducerPlain(TexoExporter &exporter):
+    TexoProducer(exporter)
+{}
+
+void TexoProducerPlain::Put(const Texo &piece)
+{
+    if (quoted && piece.c == '\n') {
+        exporter.Put("\n> ");
+    } else {
+        exporter.Put(piece.c);
+    }
+}
+
+void TexoProducerPlain::Put(const TexoHeader &piece)
+{
+    if (!piece.closing) {
+        exporter.Put("\n\n# ");
+    }
+}
+
+void TexoProducerPlain::Put(const TexoParagraph &piece)
+{
+    if (piece.closing) {
+        exporter.Put("\n\n");
+    }
+}
+
+void TexoProducerPlain::Put(const TexoQuote &piece)
+{
+    if (piece.closing) {
+        quoted = false;
+        exporter.Put("\n\n");
+    } else {
+        quoted = true;
+        exporter.Put("\n\n> ");
+    }
+}
+
+void TexoProducerPlain::Put(const TexoLineBreak &piece)
+{
+    exporter.Put(" \n");
+}
+
+void TexoProducerPlain::Put(const TexoHorizontalRule &piece)
+{
+    exporter.Put("\n--------------------------------------------------\n");
+}
+
+
+TexoImporterPlain::TexoImporterPlain(TexoProducer &producer):
+    TexoImporter(producer), state(text)
+{
+    producer.Put(TexoParagraph());
+}
+
+TexoImporterPlain::~TexoImporterPlain()
+{
+    switch (state) {
+    case text: case space: case newline:
+        producer.Put(TexoParagraph(true));
+        break;
+    case quote: case quote_newline:
+        producer.Put(TexoQuote(true));
+        break;
+    case header:
+        producer.Put(TexoHeader(true));
+        break;
+    case paragraph:
+        break;
+    }
+}
+
+void TexoImporterPlain::Put(char c)
+{
+    switch (state) {
+    case text:                Text(c);              break;
+    case space:               Space(c);             break;
+    case newline:             Newline(c);           break;
+    case paragraph:           Paragraph(c);         break;
+    case quote:               Quote(c);             break;
+    case quote_newline:       QuoteNewline(c);      break;
+    case header:              Header(c);            break;
+    }
+}
+
+void TexoImporterPlain::Put(const ScriptVariable &str)
+{
+    TexoImporter::Put(str);
+}
+
+void TexoImporterPlain::Text(char c)
+{
+    switch (c) {
+    case ' ':  state = space;         break;
+    case '\n': state = newline;       break;
+    default:   producer.Put(Texo(c)); break;
+    }
+}
+
+void TexoImporterPlain::Space(char c)
+{
+    if (c == '\n') {
+        producer.Put(TexoLineBreak());
+        state = text;
+    } else if (c == ' ') {
+        producer.Put(Texo(' '));
+    } else {
+        producer.Put(Texo(' '));
+        producer.Put(Texo(c));
+        state = text;
+    }
+}
+
+void TexoImporterPlain::Newline(char c)
+{
+    if (c == '\n') {
+        producer.Put(TexoParagraph(true));
+        state = paragraph;
+    } else {
+        producer.Put(Texo('\n'));
+        producer.Put(Texo(c));
+        state = text;
+    }
+}
+
+void TexoImporterPlain::Paragraph(char c)
+{
+    if (c == '>') {
+        producer.Put(TexoQuote());
+        state = quote;
+    } else if (c == '#') {
+        producer.Put(TexoHeader(1));
+        state = header;
+    } else {
+        producer.Put(TexoParagraph());
+        producer.Put(Texo(c));
+        state = text;
+    }
+}
+
+void TexoImporterPlain::Quote(char c)
+{
+    switch (c) {
+    case '\n': state = quote_newline; break;
+    default:   producer.Put(Texo(c)); break;
+    }
+}
+
+void TexoImporterPlain::QuoteNewline(char c)
+{
+    if (c == '>') {
+        state = quote;
+    } else if (c == '\n') {
+        producer.Put(TexoQuote(true));
+        state = paragraph;
+    } else {
+        producer.Put(TexoQuote(true));
+        producer.Put(TexoParagraph());
+        producer.Put(Texo(c));
+        state = text;
+    }
+}
+
+void TexoImporterPlain::Header(char c)
+{
+    if (c == '\n') {
+        producer.Put(TexoHeader(1, true));
+        state = paragraph;
+    } else {
+        producer.Put(Texo(c));
+    }
+}
diff --git a/src/plain.hpp b/src/plain.hpp
index d1a9efb..6fa086f 100644
--- a/src/plain.hpp
+++ b/src/plain.hpp
@@ -4,18 +4,52 @@
 #include "exporter.hpp"
 #include "producer.hpp"
 #include "importer.hpp"
-#include "texo.hpp"
 
 
 class TexoProducerPlain: public TexoProducer {
 public:
     TexoProducerPlain(TexoExporter &exporter);
+
+    void Put(const Texo &piece);
+
+    void Put(const TexoHeader &piece);
+    void Put(const TexoParagraph &piece);
+    void Put(const TexoQuote &piece);
+
+    void Put(const TexoLineBreak &piece);
+    void Put(const TexoHorizontalRule &piece);
+
+private:
+    bool quoted;
 };
 
 
 class TexoImporterPlain: public TexoImporter {
 public:
     TexoImporterPlain(TexoProducer &producer);
+    ~TexoImporterPlain();
+
+    void Put(char c);
+    void Put(const ScriptVariable &str);
+
+private:
+    enum State {
+        text,
+        space,
+        newline,
+        paragraph,
+        quote,
+        quote_newline,
+        header
+    } state;
+
+    void Text(char c);
+    void Space(char c);
+    void Newline(char c);
+    void Paragraph(char c);
+    void Quote(char c);
+    void QuoteNewline(char c);
+    void Header(char c);
 };
 
 
diff --git a/src/producer.cpp b/src/producer.cpp
index 959e210..c3ef801 100644
--- a/src/producer.cpp
+++ b/src/producer.cpp
@@ -1 +1,26 @@
 #include "producer.hpp"
+
+
+TexoProducer::TexoProducer(TexoExporter &exporter): exporter(exporter)
+{}
+
+void TexoProducer::Put(const Texo &piece)
+{
+    exporter.Put(piece.c);
+}
+
+void TexoProducer::Put(const TexoHeader &piece)          {}
+void TexoProducer::Put(const TexoParagraph &piece)       {}
+void TexoProducer::Put(const TexoCode &piece)            {}
+void TexoProducer::Put(const TexoQuote &piece)           {}
+
+void TexoProducer::Put(const TexoMono &piece)            {}
+void TexoProducer::Put(const TexoBold &piece)            {}
+void TexoProducer::Put(const TexoItalic &piece)          {}
+void TexoProducer::Put(const TexoUnderline &piece)       {}
+void TexoProducer::Put(const TexoStrike &piece)          {}
+void TexoProducer::Put(const TexoLink &piece)            {}
+
+void TexoProducer::Put(const TexoImage &piece)           {}
+void TexoProducer::Put(const TexoLineBreak &piece)       {}
+void TexoProducer::Put(const TexoHorizontalRule &piece)  {}
diff --git a/src/producer.hpp b/src/producer.hpp
index 65f6ec3..a2f9ecc 100644
--- a/src/producer.hpp
+++ b/src/producer.hpp
@@ -1,5 +1,35 @@
 #ifndef TEXO_INCLUDED_PRODUCER
 #define TEXO_INCLUDED_PRODUCER
 
+#include "texo.hpp"
+#include "exporter.hpp"
+
+
+class TexoProducer {
+public:
+    TexoProducer(TexoExporter &exporter);
+
+    virtual void Put(const Texo &piece);
+
+    virtual void Put(const TexoHeader &piece);
+    virtual void Put(const TexoParagraph &piece);
+    virtual void Put(const TexoCode &piece);
+    virtual void Put(const TexoQuote &piece);
+
+    virtual void Put(const TexoMono &piece);
+    virtual void Put(const TexoBold &piece);
+    virtual void Put(const TexoItalic &piece);
+    virtual void Put(const TexoUnderline &piece);
+    virtual void Put(const TexoStrike &piece);
+
+    virtual void Put(const TexoImage &piece);
+    virtual void Put(const TexoLink &piece);
+    virtual void Put(const TexoLineBreak &piece);
+    virtual void Put(const TexoHorizontalRule &piece);
+
+protected:
+    TexoExporter &exporter;
+};
+
 
 #endif
diff --git a/src/texo.cpp b/src/texo.cpp
index aefff4c..fa4b4be 100644
--- a/src/texo.cpp
+++ b/src/texo.cpp
@@ -1 +1,32 @@
 #include "texo.hpp"
+
+
+Texo::Texo(char c): c(c)
+{}
+
+TexoHeader::TexoHeader(int level, bool closing): level(level), closing(closing)
+{}
+
+TexoParagraph::TexoParagraph(bool closing): closing(closing)
+{}
+
+TexoCode::TexoCode(bool closing): closing(closing)
+{}
+
+TexoQuote::TexoQuote(bool closing): closing(closing)
+{}
+
+TexoMono::TexoMono(bool closing): closing(closing)
+{}
+
+TexoBold::TexoBold(bool closing): closing(closing)
+{}
+
+TexoItalic::TexoItalic(bool closing): closing(closing)
+{}
+
+TexoUnderline::TexoUnderline(bool closing): closing(closing)
+{}
+
+TexoStrike::TexoStrike(bool closing): closing(closing)
+{}
diff --git a/src/texo.hpp b/src/texo.hpp
index 93cad3a..e2a7d86 100644
--- a/src/texo.hpp
+++ b/src/texo.hpp
@@ -1,5 +1,87 @@
 #ifndef TEXO_INCLUDED_TEXO
 #define TEXO_INCLUDED_TEXO
 
+#include <scrvar.hpp>
+
+
+struct Texo {
+    Texo(char c);
+    char c;
+};
+
+/*
+ * Texo Blocks
+ */
+struct TexoHeader {
+    TexoHeader(int level, bool closing = false);
+    int  level; // Number >= 1, bigger for bigger.
+    bool closing;
+};
+
+struct TexoParagraph {
+    TexoParagraph(bool closing = false);
+    bool closing;
+};
+
+struct TexoCode {
+    TexoCode(bool closing = false);
+    bool closing;
+};
+
+struct TexoQuote {
+    TexoQuote(bool closing = false);
+    bool closing;
+};
+
+/*
+ * Texo Decorators
+ */
+struct TexoMono {
+    TexoMono(bool closing = false);
+    bool closing;
+};
+
+struct TexoBold {
+    TexoBold(bool closing = false);
+    bool closing;
+};
+
+struct TexoItalic {
+    TexoItalic(bool closing = false);
+    bool closing;
+};
+
+struct TexoUnderline {
+    TexoUnderline(bool closing = false);
+    bool closing;
+};
+
+struct TexoStrike {
+    TexoStrike(bool closing = false);
+    bool closing;
+};
+
+/*
+ * Texo Signals
+ */
+struct TexoImage {
+    ScriptVariable path;
+    ScriptVariable title;
+    ScriptVariable alt;
+    ScriptVariable link;
+};
+
+struct TexoLink {
+    ScriptVariable text;
+    ScriptVariable link;
+    ScriptVariable title;
+};
+
+struct TexoLineBreak {
+};
+
+struct TexoHorizontalRule {
+};
+
 
 #endif
-- 
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