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Introduce the Renderer interface.

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This commit is contained in:
Manuel Friedli 2020-10-02 18:30:09 +02:00
parent c6b8b0e3bd
commit 487ed4604d
4 changed files with 61 additions and 37 deletions
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35
src/main/java/ch/fritteli/labyrinth/HTMLRenderer.java
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@ -4,10 +4,11 @@ import io.vavr.collection.HashSet;
import io.vavr.collection.Set; import io.vavr.collection.Set;
import lombok.NonNull; import lombok.NonNull;
public class HTMLRenderer { public class HTMLRenderer implements Renderer<String> {
private static final String PREAMBLE = "<!DOCTYPE html><html lang=\"en\">" + private static final String PREAMBLE = "<!DOCTYPE html><html lang=\"en\">" +
"<head>" + "<head>" +
"<title>Labyrinth</title>" + "<title>Labyrinth</title>" +
"<meta charset=\"utf-8\">" +
"<style>" + "<style>" +
"table{border-collapse:collapse;}" + "table{border-collapse:collapse;}" +
"td{border:0 solid black;height:1em;width:1em;}" + "td{border:0 solid black;height:1em;width:1em;}" +
@ -32,30 +33,32 @@ public class HTMLRenderer {
"<body>" + "<body>" +
"<input type=\"checkbox\" onclick=\"toggleSolution()\">show solution</input>"; "<input type=\"checkbox\" onclick=\"toggleSolution()\">show solution</input>";
private static final String POSTAMBLE = "</body></html>"; private static final String POSTAMBLE = "</body></html>";
private final Labyrinth labyrinth; private Labyrinth labyrinth;
private final int width; private int width;
private final int height; private int height;
// row counter // row counter
private int y = 0; private int y = 0;
private HTMLRenderer(@NonNull final Labyrinth labyrinth, final int width, final int height) { private HTMLRenderer() {
this.labyrinth = labyrinth;
this.width = width;
this.height = height;
} }
public static String render(@NonNull final Labyrinth labyrinth) { @NonNull
final int width = labyrinth.getWidth(); public static HTMLRenderer newInstance() {
final int height = labyrinth.getHeight(); return new HTMLRenderer();
if (width == 0 || height == 0) { }
@NonNull
public String render(@NonNull final Labyrinth labyrinth) {
this.labyrinth = labyrinth;
this.width = labyrinth.getWidth();
this.height = labyrinth.getHeight();
if (this.width == 0 || this.height == 0) {
return PREAMBLE + POSTAMBLE; return PREAMBLE + POSTAMBLE;
} }
final HTMLRenderer renderer = new HTMLRenderer(labyrinth, width, height);
final StringBuilder sb = new StringBuilder(PREAMBLE); final StringBuilder sb = new StringBuilder(PREAMBLE);
sb.append("<table>"); sb.append("<table>");
while (renderer.hasNext()) { while (this.hasNext()) {
sb.append(renderer.next()); sb.append(this.next());
} }
sb.append("</table>"); sb.append("</table>");
sb.append(POSTAMBLE); sb.append(POSTAMBLE);

11
src/main/java/ch/fritteli/labyrinth/Main.java
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@ -4,10 +4,13 @@ import lombok.NonNull;
public class Main { public class Main {
public static void main(@NonNull final String[] args) { public static void main(@NonNull final String[] args) {
int width = 100; int width = 10;
int height = 50; int height = 10;
final Labyrinth labyrinth = new Labyrinth(width, height); final Labyrinth labyrinth = new Labyrinth(width, height);
System.out.println(TextRenderer.render(labyrinth)); final TextRenderer textRenderer = TextRenderer.newInstance();
System.out.println(HTMLRenderer.render(labyrinth)); System.out.println(textRenderer.render(labyrinth));
System.out.println(textRenderer.setRenderingSolution(true).render(labyrinth));
final HTMLRenderer htmlRenderer = HTMLRenderer.newInstance();
System.out.println(htmlRenderer.render(labyrinth));
} }
} }

8
src/main/java/ch/fritteli/labyrinth/Renderer.java Normal file
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@ -0,0 +1,8 @@
package ch.fritteli.labyrinth;
import lombok.NonNull;
public interface Renderer<T> {
@NonNull
T render(@NonNull final Labyrinth labyrinth);
}

44
src/main/java/ch/fritteli/labyrinth/TextRenderer.java
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@ -7,10 +7,11 @@ import lombok.NonNull;
import lombok.experimental.FieldDefaults; import lombok.experimental.FieldDefaults;
import org.jetbrains.annotations.Nullable; import org.jetbrains.annotations.Nullable;
public class TextRenderer { public class TextRenderer implements Renderer<String> {
private final Labyrinth labyrinth; private Labyrinth labyrinth;
private final int width; private int width;
private final int height; private int height;
private boolean renderSolution;
// column counter // column counter
private int x = 0; private int x = 0;
// row counter // row counter
@ -18,23 +19,32 @@ public class TextRenderer {
// line counter (top-, center- or bottom line of a row) // line counter (top-, center- or bottom line of a row)
private int line = 0; private int line = 0;
private TextRenderer(@NonNull final Labyrinth labyrinth, final int width, final int height) { private TextRenderer() {
this.labyrinth = labyrinth; this.renderSolution = false;
this.width = width;
this.height = height;
} }
public static String render(@NonNull final Labyrinth labyrinth) { @NonNull
final int width = labyrinth.getWidth(); public static TextRenderer newInstance() {
final int height = labyrinth.getHeight(); return new TextRenderer();
if (width == 0 || height == 0) { }
@NonNull
public TextRenderer setRenderingSolution(final boolean renderSolution) {
this.renderSolution = renderSolution;
return this;
}
@NonNull
public String render(@NonNull final Labyrinth labyrinth) {
this.labyrinth = labyrinth;
this.width = labyrinth.getWidth();
this.height = labyrinth.getHeight();
if (this.width == 0 || this.height == 0) {
return ""; return "";
} }
final TextRenderer renderer = new TextRenderer(labyrinth, width, height);
final StringBuilder sb = new StringBuilder(); final StringBuilder sb = new StringBuilder();
while (renderer.hasNext()) { while (this.hasNext()) {
sb.append(renderer.next()); sb.append(this.next());
} }
return sb.toString(); return sb.toString();
} }
@ -141,7 +151,7 @@ public class TextRenderer {
charDef2.vertical(); charDef2.vertical();
} }
result = charDef1 + (currentTile.isSolution() ? "x" : " "); result = charDef1 + (currentTile.isSolution() && this.renderSolution ? "x" : " ");
if (this.x == this.width - 1) { if (this.x == this.width - 1) {
result += charDef2 + "\n"; result += charDef2 + "\n";