From 2f88c7ae607e7506c594d7327ce3ffefa19d8136 Mon Sep 17 00:00:00 2001
From: Evgeniy Alekseev <i@arcanis.me>
Date: Fri, 1 Jul 2016 02:21:48 +0300
Subject: [PATCH] add macros support

Macros should be declared as `aw_macro<name,arg1,arg2,...>{{macro body}}` and then
they may be used as `aw_name<arg1,arg2,...>{{}}`. It just puts `macro
body` to pattern and replaces arguments to provided ones according to
macro call. E.g.:
```
$aw_macro<test,phrase>{{phrase}}$aw_test<hello world>{{}}
```
will transform into
```
hello world
```
---
 .../awesome-widget/plugin/awkeyoperations.cpp |  1 +
 .../plugin/awpatternfunctions.cpp             | 42 +++++++++++++++++++
 .../plugin/awpatternfunctions.h               |  1 +
 3 files changed, 44 insertions(+)

diff --git a/sources/awesome-widget/plugin/awkeyoperations.cpp b/sources/awesome-widget/plugin/awkeyoperations.cpp
index ea14d0c..3ce11df 100644
--- a/sources/awesome-widget/plugin/awkeyoperations.cpp
+++ b/sources/awesome-widget/plugin/awkeyoperations.cpp
@@ -342,6 +342,7 @@ void AWKeyOperations::reinitKeys()
     m_pattern = AWPatternFunctions::insertKeyCount(m_pattern, allKeys);
     m_pattern = AWPatternFunctions::insertKeyNames(m_pattern, allKeys);
     m_pattern = AWPatternFunctions::insertKeys(m_pattern, allKeys);
+    m_pattern = AWPatternFunctions::insertMacros(m_pattern);
     // wrap templates
     m_pattern = AWPatternFunctions::expandTemplates(m_pattern);
 
diff --git a/sources/awesome-widget/plugin/awpatternfunctions.cpp b/sources/awesome-widget/plugin/awpatternfunctions.cpp
index 1b1950f..ff40215 100644
--- a/sources/awesome-widget/plugin/awpatternfunctions.cpp
+++ b/sources/awesome-widget/plugin/awpatternfunctions.cpp
@@ -212,6 +212,48 @@ QString AWPatternFunctions::insertKeys(QString code, const QStringList keys)
 }
 
 
+QString AWPatternFunctions::insertMacros(QString code)
+{
+    qCDebug(LOG_AW) << "Looking for macros in code" << code;
+
+    QList<AWPatternFunctions::AWFunction> found
+        = AWPatternFunctions::findFunctionCalls(QString("aw_macro"), code);
+    for (auto macro : found) {
+        // get macro params
+        if (macro.args.isEmpty()) {
+            qCWarning(LOG_AW) << "No macro name found for" << macro.what;
+            continue;
+        }
+        QString name = macro.args.takeFirst();
+        // find macro usage
+        QList<AWPatternFunctions::AWFunction> macroUsage
+            = AWPatternFunctions::findFunctionCalls(QString("aw_%1").arg(name),
+                                                    code);
+        for (auto function : macroUsage) {
+            if (function.args.count() != macro.args.count()) {
+                qCWarning(LOG_AW) << "Invalid args count found for call"
+                                  << function.what << "with macro"
+                                  << macro.what;
+                continue;
+            }
+            // generate body to replace
+            QString result = macro.body;
+            for (auto arg : macro.args) {
+                int index = macro.args.indexOf(arg);
+                result.replace(arg, function.args.at(index));
+            }
+            // do replace
+            code.replace(function.what, result);
+        }
+
+        // remove macro from source pattern
+        code.remove(macro.what);
+    }
+
+    return code;
+}
+
+
 QStringList AWPatternFunctions::findKeys(const QString code,
                                          const QStringList keys,
                                          const bool isBars)
diff --git a/sources/awesome-widget/plugin/awpatternfunctions.h b/sources/awesome-widget/plugin/awpatternfunctions.h
index 01575dd..b5544b0 100644
--- a/sources/awesome-widget/plugin/awpatternfunctions.h
+++ b/sources/awesome-widget/plugin/awpatternfunctions.h
@@ -43,6 +43,7 @@ QString insertAllKeys(QString code, const QStringList keys);
 QString insertKeyCount(QString code, const QStringList keys);
 QString insertKeyNames(QString code, const QStringList keys);
 QString insertKeys(QString code, const QStringList keys);
+QString insertMacros(QString code);
 // find methods
 QStringList findKeys(const QString code, const QStringList keys,
                      const bool isBars);