Markdown support

6 files changed, 93 insertions, 32 deletions

diff --git a/app/build.gradle b/app/build.gradle
index beb7c2618..0322bcae1 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -85,6 +85,8 @@ android {
         }
     }
     configurations {
+        cleanedAnnotations
+        implementation.exclude group: 'org.jetbrains', module: 'annotations'
         all {
             exclude group: 'androidx.lifecycle', module: 'lifecycle-viewmodel-ktx'
         }
@@ -186,6 +188,9 @@ dependencies {
 
 
     implementation 'io.noties.markwon:core:4.6.2'
+    implementation 'io.noties.markwon:ext-tables:4.6.2'
+    implementation 'io.noties.markwon:syntax-highlight:4.6.2'
+    annotationProcessor 'io.noties:prism4j-bundler:2.0.0'
 
     //************ CAST **************///
 
diff --git a/app/src/main/java/app/fedilab/android/MainApplication.java b/app/src/main/java/app/fedilab/android/MainApplication.java
index 8ad75b088..4192a96d0 100644
--- a/app/src/main/java/app/fedilab/android/MainApplication.java
+++ b/app/src/main/java/app/fedilab/android/MainApplication.java
@@ -42,7 +42,9 @@ import java.util.Objects;
 import app.fedilab.android.mastodon.helper.ThemeHelper;
 import app.fedilab.android.peertube.services.GlobalUploadObserver;
 import es.dmoral.toasty.Toasty;
+import io.noties.prism4j.annotations.PrismBundle;
 
+@PrismBundle(includeAll = true, grammarLocatorClassName = ".MySuperGrammerLocator")
 
 public class MainApplication extends MultiDexApplication {
 
diff --git a/app/src/main/java/app/fedilab/android/mastodon/client/entities/app/MarkdownConverter.java b/app/src/main/java/app/fedilab/android/mastodon/client/entities/app/MarkdownConverter.java
index 54dd38d58..cc074fb6d 100644
--- a/app/src/main/java/app/fedilab/android/mastodon/client/entities/app/MarkdownConverter.java
+++ b/app/src/main/java/app/fedilab/android/mastodon/client/entities/app/MarkdownConverter.java
@@ -37,5 +37,15 @@ public class MarkdownConverter {
         public String code;
         public int position;
         public URLSpan urlSpan;
+
+        public int regexPosition(List<MarkdownItem> markdownItems) {
+            int position = 0;
+            for (MarkdownItem markdownItem : markdownItems) {
+                if (markdownItem.code.equals(code) && position <= this.position) {
+                    position++;
+                }
+            }
+            return position;
+        }
     }
 }
diff --git a/app/src/main/java/app/fedilab/android/mastodon/helper/SpannableHelper.java b/app/src/main/java/app/fedilab/android/mastodon/helper/SpannableHelper.java
index 50c4d847c..5341c3776 100644
--- a/app/src/main/java/app/fedilab/android/mastodon/helper/SpannableHelper.java
+++ b/app/src/main/java/app/fedilab/android/mastodon/helper/SpannableHelper.java
@@ -43,6 +43,7 @@ import android.view.View;
 import android.webkit.URLUtil;
 import android.widget.Toast;
 
+import androidx.annotation.ColorInt;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AlertDialog;
 import androidx.core.content.ContextCompat;
@@ -71,6 +72,7 @@ import java.util.regex.Pattern;
 import javax.net.ssl.HttpsURLConnection;
 
 import app.fedilab.android.BaseMainActivity;
+import app.fedilab.android.MySuperGrammerLocator;
 import app.fedilab.android.R;
 import app.fedilab.android.activities.MainActivity;
 import app.fedilab.android.databinding.PopupLinksBinding;
@@ -89,6 +91,10 @@ import app.fedilab.android.mastodon.ui.drawer.StatusAdapter;
 import app.fedilab.android.mastodon.viewmodel.mastodon.FiltersVM;
 import es.dmoral.toasty.Toasty;
 import io.noties.markwon.Markwon;
+import io.noties.markwon.ext.tables.TablePlugin;
+import io.noties.markwon.syntax.Prism4jThemeDefault;
+import io.noties.markwon.syntax.SyntaxHighlightPlugin;
+import io.noties.prism4j.Prism4j;
 
 public class SpannableHelper {
 
@@ -149,44 +155,56 @@ public class SpannableHelper {
         } else {
             initialContent = new SpannableString(text);
         }
-
+        boolean markdownSupport = sharedpreferences.getBoolean(context.getString(R.string.SET_MARKDOWN_SUPPORT), true);
         //Get all links
-        MarkdownConverter markdownConverter = new MarkdownConverter();
-        markdownConverter.markdownItems = new ArrayList<>();
-        int next;
-        int position = 0;
-        for (int i = 0; i < initialContent.length(); i = next) {
-            // find the next span transition
-            next = initialContent.nextSpanTransition(i, initialContent.length(), URLSpan.class);
-            MarkdownConverter.MarkdownItem markdownItem = new MarkdownConverter.MarkdownItem();
-            markdownItem.code = initialContent.subSequence(i, next).toString();
-
-            markdownItem.position = position;
-            // get all spans in this range
-            URLSpan[] spans = initialContent.getSpans(i, next, URLSpan.class);
-            if (spans != null && spans.length > 0) {
-                markdownItem.urlSpan = spans[0];
+        SpannableStringBuilder content;
+        if (markdownSupport) {
+            MarkdownConverter markdownConverter = new MarkdownConverter();
+            markdownConverter.markdownItems = new ArrayList<>();
+            int next;
+            int position = 0;
+            for (int i = 0; i < initialContent.length(); i = next) {
+                // find the next span transition
+                next = initialContent.nextSpanTransition(i, initialContent.length(), URLSpan.class);
+                MarkdownConverter.MarkdownItem markdownItem = new MarkdownConverter.MarkdownItem();
+                markdownItem.code = initialContent.subSequence(i, next).toString();
+
+                markdownItem.position = position;
+                // get all spans in this range
+                URLSpan[] spans = initialContent.getSpans(i, next, URLSpan.class);
+                if (spans != null && spans.length > 0) {
+                    markdownItem.urlSpan = spans[0];
+                }
+
+                if (markdownItem.code.trim().length() > 0) {
+                    markdownConverter.markdownItems.add(markdownItem);
+                    position++;
+                }
             }
 
-            if (markdownItem.code.trim().length() > 0) {
-                markdownConverter.markdownItems.add(markdownItem);
+            final Markwon markwon = Markwon.builder(context)
+                    .usePlugin(TablePlugin.create(context))
+                    .usePlugin(SyntaxHighlightPlugin.create(new Prism4j(new MySuperGrammerLocator()), Prism4jThemeDefault.create())).build();
+
+            final Spanned markdown = markwon.toMarkdown(initialContent.toString());
+            content = new SpannableStringBuilder(markdown);
+            position = 0;
+            for (MarkdownConverter.MarkdownItem markdownItem : markdownConverter.markdownItems) {
+                Pattern p = Pattern.compile("(" + Pattern.quote(markdownItem.code) + ")", Pattern.CASE_INSENSITIVE);
+                Matcher m = p.matcher(content);
+                int fetchPosition = 1;
+                while (m.find()) {
+                    int regexPosition = markdownItem.regexPosition(markdownConverter.markdownItems);
+                    if (regexPosition == fetchPosition) {
+                        content.setSpan(markdownItem.urlSpan, m.start(), m.end(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+                    }
+                    fetchPosition++;
+                }
                 position++;
             }
+        } else {
+            content = new SpannableStringBuilder(initialContent);
         }
-        final Markwon markwon = Markwon.create(context);
-
-        final Spanned markdown = markwon.toMarkdown(initialContent.toString());
-        SpannableStringBuilder content = new SpannableStringBuilder(markdown);
-        position = 0;
-        for (MarkdownConverter.MarkdownItem markdownItem : markdownConverter.markdownItems) {
-            Pattern p = Pattern.compile("(" + Pattern.quote(markdownItem.code) + ")", Pattern.CASE_INSENSITIVE);
-            Matcher m = p.matcher(content);
-            while (m.find()) {
-                content.setSpan(markdownItem.urlSpan, m.start(), m.end(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
-            }
-            position++;
-        }
-
 
         URLSpan[] urls = content.getSpans(0, (content.length() - 1), URLSpan.class);
         //Loop through links
@@ -336,6 +354,23 @@ public class SpannableHelper {
         return trimSpannable(new SpannableStringBuilder(content));
     }
 
+    public interface Prism4jTheme {
+
+        @ColorInt
+        int background();
+
+        @ColorInt
+        int textColor();
+
+        void apply(
+                @NonNull String language,
+                @NonNull Prism4j.Syntax syntax,
+                @NonNull SpannableStringBuilder builder,
+                int start,
+                int end
+        );
+    }
+
 
     private static void makeLinks(Context context, SpannableStringBuilder content, String url, int start, int end) {
         String newUrl = url;
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 5697d8511..45dee809f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1156,6 +1156,7 @@
 
     <string name="SET_GROUP_REBLOGS" translatable="false">SET_GROUP_REBLOGS</string>
     <string name="SET_BOOST_ORIGINAL_DATE" translatable="false">SET_BOOST_ORIGINAL_DATE</string>
+    <string name="SET_MARKDOWN_SUPPORT" translatable="false">SET_MARKDOWN_SUPPORT</string>
     <string name="SET_TRUNCATE_LINKS" translatable="false">SET_TRUNCATE_LINKS</string>
     <string name="SET_TRUNCATE_LINKS_MAX" translatable="false">SET_TRUNCATE_LINKS_MAX</string>
 
@@ -1907,6 +1908,7 @@
     <string name="also_followed_by">Followed by:</string>
     <string name="Directory">Directory</string>
     <string name="boost_original_date">Display original date for boosts</string>
+    <string name="markdown_support">Markdown support</string>
     <string name="set_disable_release_notes">Disable release notes</string>
     <string name="set_disable_release_notes_indication">When a new version is published, you will not be alerted inside the app.</string>
     <string name="formula">Formula</string>
diff --git a/app/src/main/res/xml/pref_timelines.xml b/app/src/main/res/xml/pref_timelines.xml
index 410c18e62..6c5fc27bd 100644
--- a/app/src/main/res/xml/pref_timelines.xml
+++ b/app/src/main/res/xml/pref_timelines.xml
@@ -53,6 +53,13 @@
     <SwitchPreferenceCompat
         android:defaultValue="true"
         app:iconSpaceReserved="false"
+        app:key="@string/SET_MARKDOWN_SUPPORT"
+        app:singleLineTitle="false"
+        app:title="@string/markdown_support" />
+
+    <SwitchPreferenceCompat
+        android:defaultValue="true"
+        app:iconSpaceReserved="false"
         app:key="@string/SET_TRUNCATE_LINKS"
         app:singleLineTitle="false"
         app:title="@string/truncate_links" />