18 files changed, 344 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ba1f399
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+Case Conversion.jar
+out/
diff --git a/Case Conversion.iml b/Case Conversion.iml
new file mode 100644
index 0000000..e025b20
--- /dev/null
+++ b/Case Conversion.iml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PLUGIN_MODULE" version="4">
+  <component name="DevKit.ModuleBuildProperties" url="file://$MODULE_DIR$/resources/META-INF/plugin.xml" />
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/resources" type="java-resource" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..90107a0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,13 @@
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar
+  14 rue de Plaisance, 75014 Paris, France
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d7cc58b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,17 @@
+Case Conversion
+===============
+
+A plugin for JetBrain IDEs to convert between cases.
+
+The plugin provides actions to convert to these cases:
+
+- `snake_case`
+- `dash-case`
+- `camelCase`
+- `PascalCase`
+- `SCREAMING_SNAKE_CASE`
+- `UPPER CASE`
+- `lower case`
+- `fLIP cASE`
+
+The Plugin was inspired by the [Case Conversion Plugin for SublimeText](https://packagecontrol.io/packages/Case%20Conversion).
+\ No newline at end of file
diff --git a/resources/META-INF/plugin.xml b/resources/META-INF/plugin.xml
new file mode 100644
index 0000000..c532213
--- /dev/null
+++ b/resources/META-INF/plugin.xml
@@ -0,0 +1,76 @@
+<idea-plugin>
+  <id>me.laria.code.idea_caseconv</id>
+  <name>Case conversion</name>
+  <version>0.5</version>
+  <vendor email="laria@laria.me" url="https://code.laria.me">Laria Chabowski</vendor>
+
+  <description><![CDATA[<html>
+      <p>Convert between cases.</p>
+      <p>The Plugin provides actions to convert to the following cases:</p>
+      <ul>
+        <li>snake_case</li>
+        <li>dash-case</li>
+        <li>camelCase</li>
+        <li>PascalCase</li>
+        <li>SCREAMING_SNAKE_CASE</li>
+        <li>UPPER CASE</li>
+        <li>lower case</li>
+        <li>fLIP cASE</li>
+      </ul>
+    </html>]]></description>
+
+  <change-notes><![CDATA[]]>
+  </change-notes>
+
+  <!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/build_number_ranges.html for description -->
+  <idea-version since-build="173.0"/>
+
+  <!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/plugin_compatibility.html
+       on how to target different products -->
+  <depends>com.intellij.modules.lang</depends>
+
+  <extensions defaultExtensionNs="com.intellij">
+    <!-- Add your extensions here -->
+  </extensions>
+
+  <actions>
+    <!-- Add your actions here -->
+    <action id="me.laria.code.idea_caseconv.SnakeCaseAction" class="me.laria.code.idea_caseconv.SnakeCaseAction"
+            text="Convert Case: snake__case">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.DashCaseAction" class="me.laria.code.idea_caseconv.DashCaseAction"
+            text="Convert Case: dash-case">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.SeparateWordsAction" class="me.laria.code.idea_caseconv.SeparateWordsAction"
+            text="Convert case: separate words">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.CamelCaseAction" class="me.laria.code.idea_caseconv.CamelCaseAction"
+            text="Convert Case: camelCase">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.PascalCaseAction" class="me.laria.code.idea_caseconv.PascalCaseAction"
+            text="Convert Case: PascalCase">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.ScreamingSnakeCaseAction"
+            class="me.laria.code.idea_caseconv.ScreamingSnakeCaseAction" text="Convert Case: SCREAMING__SNAKE__CASE">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.UpperCaseAction" class="me.laria.code.idea_caseconv.UpperCaseAction"
+            text="Convert Case: UPPER CASE">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.LowerCaseAction" class="me.laria.code.idea_caseconv.LowerCaseAction"
+            text="Convert Case: lower case">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+    <action id="me.laria.code.idea_caseconv.FlipCaseAction" class="me.laria.code.idea_caseconv.FlipCaseAction"
+            text="Convert Case: fLIP cASE">
+      <add-to-group group-id="EditMenu" anchor="first"/>
+    </action>
+  </actions>
+
+</idea-plugin>
+\ No newline at end of file
diff --git a/src/me/laria/code/idea_caseconv/CamelCaseAction.java b/src/me/laria/code/idea_caseconv/CamelCaseAction.java
new file mode 100644
index 0000000..93ca85b
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/CamelCaseAction.java
@@ -0,0 +1,18 @@
+package me.laria.code.idea_caseconv;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Optional;
+
+public class CamelCaseAction extends SelectionReplacerAction {
+    @NotNull
+    public static String ucfirst(String s) {
+        s = s.toLowerCase();
+        return s.substring(0, 1).toUpperCase().concat(s.substring(1));
+    }
+
+    @Override
+    protected String replace(String s) {
+        return WordSplitConverter.convert(s, "", (i, part) -> Optional.of(i == 0 ? part.toLowerCase() : ucfirst(part)));
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/DashCaseAction.java b/src/me/laria/code/idea_caseconv/DashCaseAction.java
new file mode 100644
index 0000000..5e030ab
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/DashCaseAction.java
@@ -0,0 +1,10 @@
+package me.laria.code.idea_caseconv;
+
+import java.util.Optional;
+
+public class DashCaseAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        return WordSplitConverter.convert(s, "-", (i, s1) -> Optional.of(s1.toLowerCase()));
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/FlipCaseAction.java b/src/me/laria/code/idea_caseconv/FlipCaseAction.java
new file mode 100644
index 0000000..22df45a
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/FlipCaseAction.java
@@ -0,0 +1,12 @@
+package me.laria.code.idea_caseconv;
+
+public class FlipCaseAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        StringBuilder builder = new StringBuilder();
+
+        s.codePoints().forEach(c -> builder.appendCodePoint(Character.isLowerCase(c) ? Character.toUpperCase(c) : Character.toLowerCase(c)));
+
+        return builder.toString();
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/LowerCaseAction.java b/src/me/laria/code/idea_caseconv/LowerCaseAction.java
new file mode 100644
index 0000000..d32507e
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/LowerCaseAction.java
@@ -0,0 +1,8 @@
+package me.laria.code.idea_caseconv;
+
+public class LowerCaseAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        return s.toLowerCase();
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/PascalCaseAction.java b/src/me/laria/code/idea_caseconv/PascalCaseAction.java
new file mode 100644
index 0000000..fb13265
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/PascalCaseAction.java
@@ -0,0 +1,10 @@
+package me.laria.code.idea_caseconv;
+
+import java.util.Optional;
+
+public class PascalCaseAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        return WordSplitConverter.convert(s, "", (i, part) -> Optional.of(CamelCaseAction.ucfirst(part)));
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/Replacement.java b/src/me/laria/code/idea_caseconv/Replacement.java
new file mode 100644
index 0000000..804812b
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/Replacement.java
@@ -0,0 +1,25 @@
+package me.laria.code.idea_caseconv;
+
+import com.intellij.openapi.editor.Document;
+import org.jetbrains.annotations.NotNull;
+
+class Replacement implements Comparable<Replacement> {
+    private final int a;
+    private final int b;
+    private final String s;
+
+    public Replacement(int a, int b, String s) {
+        this.a = Integer.min(a, b);
+        this.b = Integer.max(a, b);
+        this.s = s;
+    }
+
+    public void doReplace(Document doc) {
+        doc.replaceString(this.a, this.b, this.s);
+    }
+
+    @Override
+    public int compareTo(@NotNull Replacement o) {
+        return Integer.compare(this.a, o.a);
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/ScreamingSnakeCaseAction.java b/src/me/laria/code/idea_caseconv/ScreamingSnakeCaseAction.java
new file mode 100644
index 0000000..c77bbfe
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/ScreamingSnakeCaseAction.java
@@ -0,0 +1,10 @@
+package me.laria.code.idea_caseconv;
+
+import java.util.Optional;
+
+public class ScreamingSnakeCaseAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        return WordSplitConverter.convert(s, "_", (i, part) -> Optional.of(part.toUpperCase()));
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/SelectionReplacerAction.java b/src/me/laria/code/idea_caseconv/SelectionReplacerAction.java
new file mode 100644
index 0000000..692fd6c
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/SelectionReplacerAction.java
@@ -0,0 +1,59 @@
+package me.laria.code.idea_caseconv;
+
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.CommonDataKeys;
+import com.intellij.openapi.command.WriteCommandAction;
+import com.intellij.openapi.editor.Caret;
+import com.intellij.openapi.editor.CaretModel;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.project.Project;
+
+import java.util.ArrayList;
+
+abstract class SelectionReplacerAction extends AnAction {
+    @Override
+    public void update(final AnActionEvent e) {
+        //Get required data keys
+        final Project project = e.getData(CommonDataKeys.PROJECT);
+        final Editor editor = e.getData(CommonDataKeys.EDITOR);
+        //Set visibility only in case of existing project and editor and if some text in the editor is selected
+        e.getPresentation().setVisible(
+            project != null
+                && editor != null
+                && editor.getSelectionModel().hasSelection()
+        );
+    }
+
+    @Override
+    public void actionPerformed(AnActionEvent anActionEvent) {
+        Editor editor = anActionEvent.getData(CommonDataKeys.EDITOR);
+        Project project = anActionEvent.getData(CommonDataKeys.PROJECT);
+        assert editor != null;
+        assert project != null;
+
+        CaretModel caretModel = editor.getCaretModel();
+        Document document = editor.getDocument();
+
+        ArrayList<Replacement> replacements = new ArrayList<>();
+        for (Caret caret : caretModel.getAllCarets()) {
+            if (!caret.hasSelection()) {
+                continue;
+            }
+
+            replacements.add(new Replacement(
+                caret.getSelectionStart(),
+                caret.getSelectionEnd(),
+                this.replace(caret.getSelectedText())
+            ));
+        }
+
+        // Sort in reverse order so a replacement won't mess up the indices of the other replacements
+        replacements.sort((o1, o2) -> -o1.compareTo(o2));
+
+        WriteCommandAction.runWriteCommandAction(project, () -> replacements.forEach(r -> r.doReplace(document)));
+    }
+
+    abstract protected String replace(String s);
+}
diff --git a/src/me/laria/code/idea_caseconv/SeparateWordsAction.java b/src/me/laria/code/idea_caseconv/SeparateWordsAction.java
new file mode 100644
index 0000000..6f3f4fe
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/SeparateWordsAction.java
@@ -0,0 +1,10 @@
+package me.laria.code.idea_caseconv;
+
+import java.util.Optional;
+
+public class SeparateWordsAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        return WordSplitConverter.convert(s, " ", (i, part) -> Optional.of(part.toLowerCase()));
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/SnakeCaseAction.java b/src/me/laria/code/idea_caseconv/SnakeCaseAction.java
new file mode 100644
index 0000000..9853676
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/SnakeCaseAction.java
@@ -0,0 +1,10 @@
+package me.laria.code.idea_caseconv;
+
+import java.util.Optional;
+
+public class SnakeCaseAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        return WordSplitConverter.convert(s, "_", (i, part) -> Optional.of(part.toLowerCase()));
+    }
+}
+\ No newline at end of file
diff --git a/src/me/laria/code/idea_caseconv/UpperCaseAction.java b/src/me/laria/code/idea_caseconv/UpperCaseAction.java
new file mode 100644
index 0000000..8478f4f
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/UpperCaseAction.java
@@ -0,0 +1,8 @@
+package me.laria.code.idea_caseconv;
+
+public class UpperCaseAction extends SelectionReplacerAction {
+    @Override
+    protected String replace(String s) {
+        return s.toUpperCase();
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/WordSplitConverter.java b/src/me/laria/code/idea_caseconv/WordSplitConverter.java
new file mode 100644
index 0000000..9b87a25
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/WordSplitConverter.java
@@ -0,0 +1,36 @@
+package me.laria.code.idea_caseconv;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+class WordSplitConverter {
+    private static List<String> split(String s) {
+        Pattern decamelize = Pattern.compile("(?<![A-Z])[A-Z]");
+        s = decamelize.matcher(s).replaceAll(" $0");
+
+        String[] all_parts = s.split("[\\s_-]");
+        ArrayList<String> parts = new ArrayList<>();
+        for (String p : all_parts) {
+            p = p.trim();
+            if (!p.equals("")) {
+                parts.add(p.toLowerCase());
+            }
+        }
+
+        return parts;
+    }
+
+    public static String convert(String in, String glue, WordTransformer transform) {
+        List<String> partsIn = split(in);
+        ArrayList<String> partsOut = new ArrayList<>();
+
+        int i = 0;
+        for (String part : partsIn) {
+            transform.transform(i, part).ifPresent(partsOut::add);
+            i++;
+        }
+
+        return String.join(glue, partsOut);
+    }
+}
diff --git a/src/me/laria/code/idea_caseconv/WordTransformer.java b/src/me/laria/code/idea_caseconv/WordTransformer.java
new file mode 100644
index 0000000..ad0aeab
--- /dev/null
+++ b/src/me/laria/code/idea_caseconv/WordTransformer.java
@@ -0,0 +1,7 @@
+package me.laria.code.idea_caseconv;
+
+import java.util.Optional;
+
+interface WordTransformer {
+    Optional<String> transform(int i, String s);
+}