From dcb2bb5d3536c5230775627ad4c833e7cbd2cf48 Mon Sep 17 00:00:00 2001
From: Arne <arne@monocles.de>
Date: Thu, 19 Sep 2024 12:42:10 +0200
Subject: [PATCH] Apply monocles read more read less feature

---
 .../ui/adapter/MessageAdapter.java            |  12 +-
 src/main/res/layout/fragment_conversation.xml |   6 +-
 src/main/res/layout/item_message_content.xml  |  18 +-
 src/main/res/values/bools.xml                 |   1 +
 src/main/res/values/strings.xml               |   4 +
 src/main/res/xml/preferences_interface.xml    |   6 +
 .../de/monocles/chat/ReadMoreListener.java    |   9 +
 .../de/monocles/chat/ReadMoreTextView.java    | 239 ++++++++++++++++++
 src/monocleschat/res/values/attrs.xml         |  14 +
 9 files changed, 305 insertions(+), 4 deletions(-)
 create mode 100644 src/monocleschat/java/de/monocles/chat/ReadMoreListener.java
 create mode 100644 src/monocleschat/java/de/monocles/chat/ReadMoreTextView.java

diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
index b1139a606..b00656bde 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
@@ -1136,7 +1136,11 @@ public class MessageAdapter extends ArrayAdapter<Message> {
                     viewHolder.indicator = view.findViewById(R.id.security_indicator);
                     viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
                     viewHolder.image = view.findViewById(R.id.message_image);
-                    viewHolder.messageBody = view.findViewById(R.id.message_body);
+                    if (activity.xmppConnectionService.getBooleanPreference("set_text_collapsable", R.bool.set_text_collapsable)) {
+                        viewHolder.messageBody = view.findViewById(R.id.message_body_collapsable);
+                    } else if (!activity.xmppConnectionService.getBooleanPreference("set_text_collapsable", R.bool.set_text_collapsable)) {
+                        viewHolder.messageBody = view.findViewById(R.id.message_body);
+                    }
                     viewHolder.time = view.findViewById(R.id.message_time);
                     viewHolder.subject = view.findViewById(R.id.message_subject);
                     viewHolder.inReplyTo = view.findViewById(R.id.in_reply_to);
@@ -1160,7 +1164,11 @@ public class MessageAdapter extends ArrayAdapter<Message> {
                     viewHolder.indicator = view.findViewById(R.id.security_indicator);
                     viewHolder.edit_indicator = view.findViewById(R.id.edit_indicator);
                     viewHolder.image = view.findViewById(R.id.message_image);
-                    viewHolder.messageBody = view.findViewById(R.id.message_body);
+                    if (activity.xmppConnectionService.getBooleanPreference("set_text_collapsable", R.bool.set_text_collapsable)) {
+                        viewHolder.messageBody = view.findViewById(R.id.message_body_collapsable);
+                    } else if (!activity.xmppConnectionService.getBooleanPreference("set_text_collapsable", R.bool.set_text_collapsable)) {
+                        viewHolder.messageBody = view.findViewById(R.id.message_body);
+                    }
                     viewHolder.time = view.findViewById(R.id.message_time);
                     viewHolder.subject = view.findViewById(R.id.message_subject);
                     viewHolder.inReplyTo = view.findViewById(R.id.in_reply_to);
diff --git a/src/main/res/layout/fragment_conversation.xml b/src/main/res/layout/fragment_conversation.xml
index 543773ecf..9316de1c3 100644
--- a/src/main/res/layout/fragment_conversation.xml
+++ b/src/main/res/layout/fragment_conversation.xml
@@ -135,7 +135,11 @@
                                 app:shapeAppearance="@style/ShapeAppearanceOverlay.Photo"
                                 android:visibility="gone" />
 
-                            <TextView
+                            <de.monocles.chat.ReadMoreTextView
+                                app:trimExpandedText="@string/show_less"
+                                app:trimCollapsedText="@string/show_more"
+                                app:trimMode="trimModeLength"
+                                app:colorClickableText="?colorPrimary"
                                 android:id="@+id/context_preview_text"
                                 android:layout_weight="1"
                                 android:layout_width="0dp"
diff --git a/src/main/res/layout/item_message_content.xml b/src/main/res/layout/item_message_content.xml
index 523b5d137..deec8d5b6 100644
--- a/src/main/res/layout/item_message_content.xml
+++ b/src/main/res/layout/item_message_content.xml
@@ -65,7 +65,23 @@
             android:paddingTop="4dp"
             android:autoLink="web"
             android:longClickable="false"
-            android:textAppearance="?textAppearanceBodyMedium" />
+            android:textAppearance="?textAppearanceBodyMedium"
+            android:visibility="gone" />
+
+        <de.monocles.chat.ReadMoreTextView
+            app:trimExpandedText="@string/show_less"
+            app:trimCollapsedText="@string/show_more"
+            app:trimMode="trimModeLength"
+            app:colorClickableText="?colorPrimary"
+            android:id="@+id/message_body_collapsable"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="10dp"
+            android:paddingTop="4dp"
+            android:autoLink="web"
+            android:longClickable="false"
+            android:textAppearance="?textAppearanceBodyMedium"
+            android:visibility="gone" />
 
         <com.google.android.material.button.MaterialButton
             android:id="@+id/download_button"
diff --git a/src/main/res/values/bools.xml b/src/main/res/values/bools.xml
index 9067bec35..35b24ef77 100644
--- a/src/main/res/values/bools.xml
+++ b/src/main/res/values/bools.xml
@@ -5,4 +5,5 @@
     <bool name="show_thread_feature">false</bool>
     <bool name="show_maps_inside">true</bool>
     <bool name="show_own_accounts">false</bool>
+    <bool name="set_text_collapsable">false</bool>
 </resources>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 69c1063a0..b076a276c 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -1114,4 +1114,8 @@
     <string name="pref_show_mappreview_inside_summary">Load a preview of maps for a share location inside the chat</string>
     <string name="pref_show_own_accounts">Show own account name</string>
     <string name="pref_show_own_accounts_summary">Shows the used account on messages overview and details</string>
+    <string name="pref_set_text_collapsable_summary">Collapses text with more than 230 signs</string>
+    <string name="pref_set_text_collapsable">Collapse long text</string>
+    <string name="show_less">... show less</string>
+    <string name="show_more">... show more</string>
 </resources>
diff --git a/src/main/res/xml/preferences_interface.xml b/src/main/res/xml/preferences_interface.xml
index c6c76eca5..a8ffcdc45 100644
--- a/src/main/res/xml/preferences_interface.xml
+++ b/src/main/res/xml/preferences_interface.xml
@@ -117,6 +117,12 @@
             android:entryValues="@array/avatars_shape_values"
             android:summary="@string/pref_avatar_shape_summary"
             android:title="@string/pref_avatars_shape" />
+        <SwitchPreferenceCompat
+            android:defaultValue="@bool/set_text_collapsable"
+            android:icon="@drawable/ic_keyboard_double_arrow_down_24dp"
+            android:key="set_text_collapsable"
+            android:summary="@string/pref_set_text_collapsable_summary"
+            android:title="@string/pref_set_text_collapsable" />
         <SwitchPreferenceCompat
             android:defaultValue="@bool/use_green_background"
             android:icon="@drawable/ic_forum_24dp"
diff --git a/src/monocleschat/java/de/monocles/chat/ReadMoreListener.java b/src/monocleschat/java/de/monocles/chat/ReadMoreListener.java
new file mode 100644
index 000000000..1e459e3cc
--- /dev/null
+++ b/src/monocleschat/java/de/monocles/chat/ReadMoreListener.java
@@ -0,0 +1,9 @@
+package de.monocles.chat;
+
+/**
+ * Created by Mays Atari.
+ */
+
+public interface ReadMoreListener {
+    void onReadMoreClick(boolean readMore);
+}
\ No newline at end of file
diff --git a/src/monocleschat/java/de/monocles/chat/ReadMoreTextView.java b/src/monocleschat/java/de/monocles/chat/ReadMoreTextView.java
new file mode 100644
index 000000000..3e037055c
--- /dev/null
+++ b/src/monocleschat/java/de/monocles/chat/ReadMoreTextView.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright (C) 2016 Borja Bravo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.monocles.chat;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Color;
+import android.text.SpannableStringBuilder;
+import android.text.Spanned;
+import android.text.TextPaint;
+import android.text.method.LinkMovementMethod;
+import android.text.style.ClickableSpan;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewTreeObserver;
+
+import androidx.appcompat.widget.AppCompatTextView;
+import androidx.core.content.ContextCompat;
+
+import eu.siacs.conversations.R;
+
+public class ReadMoreTextView extends AppCompatTextView {
+
+    private static final int TRIM_MODE_LINES = 0;
+    private static final int TRIM_MODE_LENGTH = 1;
+    private static final int DEFAULT_TRIM_LENGTH = 230;
+    private static final int DEFAULT_TRIM_LINES = 7;
+    private static final int INVALID_END_INDEX = -1;
+    private static final boolean DEFAULT_SHOW_TRIM_EXPANDED_TEXT = true;
+    private static final boolean DEFAULT_READ_MORE = true;
+    private static final String ELLIPSIZE = "... ";
+
+    private CharSequence text;
+    private BufferType bufferType;
+    private boolean readMore;
+    private int trimLength;
+    private CharSequence trimCollapsedText;
+    private CharSequence trimExpandedText;
+    private final ReadMoreClickableSpan viewMoreSpan;
+    private int colorClickableText;
+    private final boolean showTrimExpandedText;
+    private ReadMoreListener readMoreListener;
+
+    private int trimMode;
+    private int lineEndIndex;
+    private int trimLines;
+
+    public ReadMoreTextView(Context context) {
+        this(context, null);
+    }
+
+    public ReadMoreTextView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ReadMoreTextView);
+        this.trimLength = typedArray.getInt(R.styleable.ReadMoreTextView_trimLength, DEFAULT_TRIM_LENGTH);
+        int resourceIdTrimCollapsedText =
+                typedArray.getResourceId(R.styleable.ReadMoreTextView_trimCollapsedText, R.string.show_more);
+        int resourceIdTrimExpandedText =
+                typedArray.getResourceId(R.styleable.ReadMoreTextView_trimExpandedText, R.string.show_less);
+        this.trimCollapsedText = getResources().getString(resourceIdTrimCollapsedText);
+        this.trimExpandedText = getResources().getString(resourceIdTrimExpandedText);
+        this.trimLines = typedArray.getInt(R.styleable.ReadMoreTextView_trimLines, DEFAULT_TRIM_LINES);
+        this.colorClickableText = typedArray.getColor(R.styleable.ReadMoreTextView_colorClickableText,
+                ContextCompat.getColor(context, androidx.appcompat.R.color.abc_btn_colored_borderless_text_material));
+        this.showTrimExpandedText =
+                typedArray.getBoolean(R.styleable.ReadMoreTextView_showTrimExpandedText, DEFAULT_SHOW_TRIM_EXPANDED_TEXT);
+        this.readMore = typedArray.getBoolean(R.styleable.ReadMoreTextView_readMore, DEFAULT_READ_MORE);
+        this.trimMode = typedArray.getInt(R.styleable.ReadMoreTextView_trimMode, TRIM_MODE_LINES);
+        typedArray.recycle();
+        viewMoreSpan = new ReadMoreClickableSpan();
+        onGlobalLayoutLineEndIndex();
+        setText();
+    }
+
+    private void setText() {
+        super.setText(text, bufferType);
+        super.setText(getDisplayableText(), bufferType);
+        setMovementMethod(LinkMovementMethod.getInstance());
+        setHighlightColor(Color.TRANSPARENT);
+    }
+
+    private CharSequence getDisplayableText() {
+        return getTrimmedText(text);
+    }
+
+    @Override
+    public void setText(CharSequence text, BufferType type) {
+        this.text = text;
+        bufferType = type;
+        setText();
+    }
+
+    private CharSequence getTrimmedText(CharSequence text) {
+        if (trimMode == TRIM_MODE_LENGTH) {
+            if (text != null && text.length() > trimLength) {
+                if (readMore) {
+                    return updateCollapsedText();
+                } else {
+                    return updateExpandedText();
+                }
+            }
+        }
+        if (trimMode == TRIM_MODE_LINES) {
+            if (text != null && lineEndIndex > 0) {
+                if (readMore) {
+                    if (getLayout().getLineCount() > trimLines) {
+                        return updateCollapsedText();
+                    }
+                } else {
+                    return updateExpandedText();
+                }
+            }
+        }
+        return text;
+    }
+
+    private CharSequence updateCollapsedText() {
+        int trimEndIndex = text.length();
+        switch (trimMode) {
+            case TRIM_MODE_LINES:
+                trimEndIndex = lineEndIndex - (ELLIPSIZE.length() + trimCollapsedText.length() + 1);
+                if (trimEndIndex < 0) {
+                    trimEndIndex = trimLength + 1;
+                }
+                break;
+            case TRIM_MODE_LENGTH:
+                trimEndIndex = trimLength + 1;
+                break;
+        }
+        SpannableStringBuilder s = new SpannableStringBuilder(text, 0, trimEndIndex)
+                .append(ELLIPSIZE)
+                .append(trimCollapsedText);
+        return addClickableSpan(s, trimCollapsedText);
+    }
+
+    private CharSequence updateExpandedText() {
+        if (showTrimExpandedText) {
+            SpannableStringBuilder s = new SpannableStringBuilder(text, 0, text.length()).append(trimExpandedText);
+            return addClickableSpan(s, trimExpandedText);
+        }
+        return text;
+    }
+
+    private CharSequence addClickableSpan(SpannableStringBuilder s, CharSequence trimText) {
+        s.setSpan(viewMoreSpan, s.length() - trimText.length(), s.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        return s;
+    }
+
+    public void setTrimLength(int trimLength) {
+        this.trimLength = trimLength;
+        setText();
+    }
+
+    public void setColorClickableText(int colorClickableText) {
+        this.colorClickableText = colorClickableText;
+    }
+
+    public void setTrimCollapsedText(CharSequence trimCollapsedText) {
+        this.trimCollapsedText = trimCollapsedText;
+    }
+
+    public void setTrimExpandedText(CharSequence trimExpandedText) {
+        this.trimExpandedText = trimExpandedText;
+    }
+
+    public void setTrimMode(int trimMode) {
+        this.trimMode = trimMode;
+    }
+
+    public void setTrimLines(int trimLines) {
+        this.trimLines = trimLines;
+    }
+
+    public void setReadMore(boolean readMore) {
+        this.readMore = readMore;
+    }
+
+    public void setReadMoreListener(ReadMoreListener readMoreListener) {
+        this.readMoreListener = readMoreListener;
+    }
+
+    private class ReadMoreClickableSpan extends ClickableSpan {
+        @Override
+        public void onClick(View widget) {
+            readMore = !readMore;
+            setText();
+
+            if(readMoreListener != null){
+                readMoreListener.onReadMoreClick(readMore);
+            }
+        }
+
+        @Override
+        public void updateDrawState(TextPaint ds) {
+            ds.setColor(colorClickableText);
+        }
+    }
+
+    private void onGlobalLayoutLineEndIndex() {
+        if (trimMode == TRIM_MODE_LINES) {
+            getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+                @Override
+                public void onGlobalLayout() {
+                    ViewTreeObserver obs = getViewTreeObserver();
+                    obs.removeOnGlobalLayoutListener(this);
+                    refreshLineEndIndex();
+                    setText();
+                }
+            });
+        }
+    }
+
+    private void refreshLineEndIndex() {
+        try {
+            if (trimLines == 0) {
+                lineEndIndex = getLayout().getLineEnd(0);
+            } else if (trimLines > 0 && getLineCount() >= trimLines) {
+                lineEndIndex = getLayout().getLineEnd(trimLines - 1);
+            } else {
+                lineEndIndex = INVALID_END_INDEX;
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/src/monocleschat/res/values/attrs.xml b/src/monocleschat/res/values/attrs.xml
index c35af8a3b..5d3c8d075 100644
--- a/src/monocleschat/res/values/attrs.xml
+++ b/src/monocleschat/res/values/attrs.xml
@@ -10,4 +10,18 @@
     <attr name="ic_accounts_selected" format="reference" />
     <attr name="ic_group_unselected" format="reference" />
     <attr name="ic_group_selected" format="reference" />
+
+    <declare-styleable name="ReadMoreTextView">
+        <attr name="trimExpandedText" format="string" />
+        <attr name="trimCollapsedText" format="string" />
+        <attr name="trimLength" format="integer" />
+        <attr name="showTrimExpandedText" format="boolean" />
+        <attr name="readMore" format="boolean" />
+        <attr name="colorClickableText" format="color" />
+        <attr name="trimLines" format="integer" />
+        <attr name="trimMode">
+            <enum name="trimModeLine" value="0"/>
+            <enum name="trimModeLength" value="1"/>
+        </attr>
+    </declare-styleable>
 </resources>