Templates pt. 3

Templates should now work, though there is no syntax to reference them
from rules yet

In addition, several internal things have been changed so as to improve
code quality

4 files changed, 179 insertions, 0 deletions

diff --git a/src/main/java/bjc/rgens/parser/templates/GrammarTemplate.java b/src/main/java/bjc/rgens/parser/templates/GrammarTemplate.java
new file mode 100644
index 0000000..a257fbd
--- /dev/null
+++ b/src/main/java/bjc/rgens/parser/templates/GrammarTemplate.java
@@ -0,0 +1,75 @@
+package bjc.rgens.parser.templates;
+
+import bjc.rgens.parser.ConfigSet;
+import bjc.rgens.parser.GenerationState;
+
+import java.io.Reader;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class GrammarTemplate {
+	public ConfigSet belongsTo;
+
+	public String name;
+
+	public final List<TemplateElement> elements;
+
+	public boolean doSpacing = true;
+
+	public GrammarTemplate(List<TemplateElement> elements) {
+		this.elements = elements;
+	}
+
+	public void generate(GenerationState state) {
+		for(TemplateElement element : elements) {
+			element.generate(state);
+
+			if(doSpacing && element.type.spacing)
+				state.contents.append("\n");
+		}
+	}
+
+	public static GrammarTemplate readTemplate(Reader rdr) {
+		List<TemplateElement> elements = new ArrayList<>();
+		GrammarTemplate template = new GrammarTemplate(elements);
+
+		Scanner scn = new Scanner(rdr);
+		scn.useDelimiter("\\R");
+
+		int lno = 0;
+		while(scn.hasNextLine()) {
+			String ln = scn.nextLine();
+			lno += 1;
+
+			switch(ln.charAt(0)) {
+			case '#':
+				// Ignore comments
+				break;
+			case '/':
+				handlePragma(elements, template, ln.substring(1));
+				break;
+			default:
+				handleLine(elements, template, ln);
+			}
+		}
+
+
+		return template;
+	}
+
+	private static void handleLine(List<TemplateElement> elements, GrammarTemplate template, String ln) {
+		if(ln.matches("^.*?\\$@.+?@\\$.*$")) {
+			/*
+			 * Handle live templates
+			 */
+			elements.add(new LiveTemplateElement(ln));
+		} else {
+			elements.add(new LiteralTemplateElement(ln));
+		}
+	}
+
+	private static void handlePragma(List<TemplateElement> elements, GrammarTemplate template, String ln) {
+
+	}
+}
diff --git a/src/main/java/bjc/rgens/parser/templates/LiteralTemplateElement.java b/src/main/java/bjc/rgens/parser/templates/LiteralTemplateElement.java
new file mode 100644
index 0000000..19ebbc2
--- /dev/null
+++ b/src/main/java/bjc/rgens/parser/templates/LiteralTemplateElement.java
@@ -0,0 +1,17 @@
+package bjc.rgens.parser.templates;
+
+import bjc.rgens.parser.GenerationState;
+
+public class LiteralTemplateElement extends TemplateElement {
+	public final String val;
+
+	public LiteralTemplateElement(String val) {
+		super(ElementType.LITERAL);
+
+		this.val = val;
+	}
+
+	public void generate(GenerationState state) {
+		state.contents.append(val);
+	}
+}
diff --git a/src/main/java/bjc/rgens/parser/templates/LiveTemplateElement.java b/src/main/java/bjc/rgens/parser/templates/LiveTemplateElement.java
new file mode 100644
index 0000000..2487c83
--- /dev/null
+++ b/src/main/java/bjc/rgens/parser/templates/LiveTemplateElement.java
@@ -0,0 +1,60 @@
+package bjc.rgens.parser.templates;
+
+import bjc.utils.data.BooleanToggle;
+import bjc.utils.funcdata.FunctionalList;
+
+import bjc.rgens.parser.GenerationState;
+import bjc.rgens.parser.RGrammarParser;
+import bjc.rgens.parser.elements.CaseElement;
+import bjc.rgens.parser.elements.LiteralCaseElement;
+
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class LiveTemplateElement extends TemplateElement {
+	private static final Pattern INSERT_PAT = Pattern.compile("\\$@(.+?)@\\$");
+
+	public final List<List<CaseElement>> elements;
+
+	public LiveTemplateElement(String val) {
+		super(ElementType.TEMPLATE);
+
+		elements = new ArrayList<>();
+
+		Matcher mat = INSERT_PAT.matcher(val);
+		StringBuffer sb = new StringBuffer();
+
+		while(mat.find()) {
+			mat.appendReplacement(sb, "");
+			String body = mat.group(1);
+
+			FunctionalList<CaseElement> elms = (FunctionalList<CaseElement>)RGrammarParser.parseElementString(body).getLeft();
+
+			elements.add(Arrays.asList(new LiteralCaseElement(sb.toString())));
+			elements.add(elms.getInternal());
+
+			sb = new StringBuffer();
+		}
+
+		mat.appendTail(sb);
+		elements.add(Arrays.asList(new LiteralCaseElement(sb.toString())));
+	}
+
+	public void generate(GenerationState state) {
+		BooleanToggle bt = new BooleanToggle(false);
+
+		for(List<CaseElement> elmList : elements) {
+			boolean doSpacing = bt.get();
+
+			for(CaseElement elm : elmList) {
+				elm.generate(state);
+
+				if(doSpacing && elm.type.spacing)
+					state.contents.append(" ");
+			}
+		}
+	}
+}
diff --git a/src/main/java/bjc/rgens/parser/templates/TemplateElement.java b/src/main/java/bjc/rgens/parser/templates/TemplateElement.java
new file mode 100644
index 0000000..dc123f3
--- /dev/null
+++ b/src/main/java/bjc/rgens/parser/templates/TemplateElement.java
@@ -0,0 +1,27 @@
+package bjc.rgens.parser.templates;
+
+import bjc.rgens.parser.GenerationState;
+
+public abstract class TemplateElement {
+	public static enum ElementType {
+		LITERAL(true),
+		TEMPLATE(true),
+		PRAGMA(false);
+
+		public final boolean spacing;
+
+		private ElementType(boolean spacing) {
+			this.spacing = spacing;
+		}
+	}
+
+	public final ElementType type;
+
+	public GrammarTemplate belongsTo;
+
+	protected TemplateElement(ElementType type) {
+		this.type = type;
+	}
+
+	public abstract void generate(GenerationState state);
+}