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package it.niedermann.owncloud.notes.util;
import android.content.Context;
import android.graphics.Color;
import android.text.Spanned;
import android.text.TextUtils;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.core.content.res.ResourcesCompat;
import com.yydcdut.markdown.MarkdownConfiguration;
import com.yydcdut.markdown.MarkdownConfiguration.Builder;
import com.yydcdut.markdown.MarkdownProcessor;
import com.yydcdut.markdown.span.MDImageSpan;
import com.yydcdut.markdown.theme.ThemeDefault;
import com.yydcdut.markdown.theme.ThemeSonsOfObsidian;
import it.niedermann.owncloud.notes.R;
/**
* Created by stefan on 07.12.16.
*/
@SuppressWarnings("WeakerAccess")
public class MarkDownUtil {
private static final String TAG = MarkDownUtil.class.getSimpleName();
public static final String CHECKBOX_UNCHECKED_MINUS = "- [ ]";
public static final String CHECKBOX_UNCHECKED_MINUS_TRAILING_SPACE = CHECKBOX_UNCHECKED_MINUS + " ";
public static final String CHECKBOX_UNCHECKED_STAR = "* [ ]";
public static final String CHECKBOX_UNCHECKED_STAR_TRAILING_SPACE = CHECKBOX_UNCHECKED_STAR + " ";
public static final String CHECKBOX_CHECKED_MINUS = "- [x]";
public static final String CHECKBOX_CHECKED_STAR = "* [x]";
private static final String MD_IMAGE_WITH_EMPTY_DESCRIPTION = "![](";
private static final String MD_IMAGE_WITH_SPACE_DESCRIPTION = "![ ](";
private static final String[] MD_IMAGE_WITH_EMPTY_DESCRIPTION_ARRAY = new String[]{MD_IMAGE_WITH_EMPTY_DESCRIPTION};
private static final String[] MD_IMAGE_WITH_SPACE_DESCRIPTION_ARRAY = new String[]{MD_IMAGE_WITH_SPACE_DESCRIPTION};
/**
* Ensures every instance of RxMD uses the same configuration
*
* @param context Context
* @return RxMDConfiguration
*/
public static Builder getMarkDownConfiguration(Context context) {
return getMarkDownConfiguration(context, Notes.isDarkThemeActive(context));
}
public static Builder getMarkDownConfiguration(Context context, Boolean darkTheme) {
return new MarkdownConfiguration.Builder(context)
.setUnOrderListColor(ResourcesCompat.getColor(context.getResources(),
darkTheme ? R.color.widget_fg_dark_theme : R.color.widget_fg_default, null))
.setHeader2RelativeSize(1.35f)
.setHeader3RelativeSize(1.25f)
.setHeader4RelativeSize(1.15f)
.setHeader5RelativeSize(1.1f)
.setHeader6RelativeSize(1.05f)
.setHorizontalRulesHeight(2)
.setCodeBgColor(darkTheme ? ResourcesCompat.getColor(context.getResources(), R.color.fg_default_high, null) : Color.LTGRAY)
.setTheme(darkTheme ? new ThemeSonsOfObsidian() : new ThemeDefault())
.setTodoColor(ResourcesCompat.getColor(context.getResources(),
darkTheme ? R.color.widget_fg_dark_theme : R.color.widget_fg_default, null))
.setTodoDoneColor(ResourcesCompat.getColor(context.getResources(),
darkTheme ? R.color.widget_fg_dark_theme : R.color.widget_fg_default, null))
.setLinkFontColor(ResourcesCompat.getColor(context.getResources(), R.color.primary, null))
.setRxMDImageLoader(new NotesImageLoader(context))
.setDefaultImageSize(400, 300);
}
/**
* This is a compatibility-method that provides workarounds for several bugs in RxMarkdown
* <p>
* https://github.com/stefan-niedermann/nextcloud-notes/issues/772
*
* @param markdownProcessor RxMarkdown MarkdownProcessor instance
* @param text CharSequence that should be parsed
* @return the processed text but with several workarounds for Bugs in RxMarkdown
*/
@NonNull
public static CharSequence parseCompat(@NonNull final MarkdownProcessor markdownProcessor, CharSequence text) {
if (TextUtils.isEmpty(text)) {
return "";
}
Log.v(TAG, "parseCompat - Original: \"" + text + "\"");
while (TextUtils.indexOf(text, MD_IMAGE_WITH_EMPTY_DESCRIPTION) >= 0) {
text = TextUtils.replace(text, MD_IMAGE_WITH_EMPTY_DESCRIPTION_ARRAY, MD_IMAGE_WITH_SPACE_DESCRIPTION_ARRAY);
}
Log.v(TAG, "parseCompat - Replaced empty image descriptions: \"" + text + "\"");
return markdownProcessor.parse(text);
}
public static boolean containsImageSpan(@NonNull CharSequence text) {
return ((Spanned) text).getSpans(0, text.length(), MDImageSpan.class).length > 0;
}
public static boolean lineStartsWithCheckbox(@NonNull String line) {
return lineStartsWithCheckbox(line, true) || lineStartsWithCheckbox(line, false);
}
public static boolean lineStartsWithCheckbox(@NonNull String line, boolean starAsLeadingCharacter) {
return starAsLeadingCharacter
? line.startsWith(CHECKBOX_UNCHECKED_STAR) || line.startsWith(CHECKBOX_CHECKED_STAR)
: line.startsWith(CHECKBOX_UNCHECKED_MINUS) || line.startsWith(CHECKBOX_CHECKED_MINUS);
}
public static int getStartOfLine(@NonNull CharSequence s, int cursorPosition) {
int startOfLine = cursorPosition;
while (startOfLine > 0 && s.charAt(startOfLine - 1) != '\n') {
startOfLine--;
}
return startOfLine;
}
public static int getEndOfLine(@NonNull CharSequence s, int cursorPosition) {
int nextLinebreak = s.toString().indexOf('\n', cursorPosition);
if (nextLinebreak > -1) {
return nextLinebreak;
}
return cursorPosition;
}
}
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