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

1 files changed, 75 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) {
+
+	}
+}