package eu.faircode.email; import android.app.Activity; import android.content.Context; import android.content.DialogInterface; import android.content.SharedPreferences; import android.graphics.Typeface; import android.os.Build; import android.text.SpannableString; import android.text.SpannableStringBuilder; import android.text.Spanned; import android.text.style.BulletSpan; import android.text.style.ForegroundColorSpan; import android.text.style.ImageSpan; import android.text.style.QuoteSpan; import android.text.style.RelativeSizeSpan; import android.text.style.StrikethroughSpan; import android.text.style.StyleSpan; import android.text.style.TypefaceSpan; import android.text.style.URLSpan; import android.text.style.UnderlineSpan; import android.view.MenuItem; import android.view.SubMenu; import android.view.View; import android.view.inputmethod.InputMethodManager; import android.widget.EditText; import androidx.appcompat.widget.PopupMenu; import androidx.preference.PreferenceManager; import com.flask.colorpicker.ColorPickerView; import com.flask.colorpicker.builder.ColorPickerClickListener; import com.flask.colorpicker.builder.ColorPickerDialogBuilder; import java.util.ArrayList; import java.util.List; public class StyleHelper { static boolean apply(int action, View anchor, EditText etBody, Object... args) { Log.i("Style action=" + action); try { int start = etBody.getSelectionStart(); int end = etBody.getSelectionEnd(); if (start < 0) start = 0; if (end < 0) end = 0; if (start > end) { int tmp = start; start = end; end = tmp; } SpannableString ss = new SpannableString(etBody.getText()); switch (action) { case R.id.menu_bold: case R.id.menu_italic: { int style = (action == R.id.menu_bold ? Typeface.BOLD : Typeface.ITALIC); boolean has = false; for (StyleSpan span : ss.getSpans(start, end, StyleSpan.class)) if (span.getStyle() == style) { has = true; ss.removeSpan(span); } if (!has) ss.setSpan(new StyleSpan(style), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); etBody.setText(ss); etBody.setSelection(start, end); return true; } case R.id.menu_underline: { boolean has = false; for (UnderlineSpan span : ss.getSpans(start, end, UnderlineSpan.class)) { has = true; ss.removeSpan(span); } if (!has) ss.setSpan(new UnderlineSpan(), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); etBody.setText(ss); etBody.setSelection(start, end); return true; } case R.id.menu_style: { final int s = start; final int e = end; final SpannableStringBuilder t = new SpannableStringBuilder(ss); PopupMenu popupMenu = new PopupMenu(anchor.getContext(), anchor); popupMenu.inflate(R.menu.popup_style); String[] fontNames = anchor.getResources().getStringArray(R.array.fontNameNames); SubMenu smenu = popupMenu.getMenu().findItem(R.id.menu_style_font).getSubMenu(); for (int i = 0; i < fontNames.length; i++) smenu.add(R.id.group_style_font, i, 0, fontNames[i]); smenu.add(R.id.group_style_font, fontNames.length, 0, R.string.title_style_font_default); popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { try { switch (item.getGroupId()) { case R.id.group_style_size: return setSize(item); case R.id.group_style_color: return setColor(item); case R.id.group_style_list: return setList(item); case R.id.group_style_font: return setFont(item); case R.id.group_style_blockquote: return setBlockquote(item); case R.id.group_style_strikethrough: return setStrikethrough(item); case R.id.group_style_clear: return clear(item); default: return false; } } catch (Throwable ex) { Log.e(ex); return false; } } private boolean setSize(MenuItem item) { RelativeSizeSpan[] spans = t.getSpans(s, e, RelativeSizeSpan.class); for (RelativeSizeSpan span : spans) t.removeSpan(span); Float size; if (item.getItemId() == R.id.menu_style_size_small) size = 0.8f; else if (item.getItemId() == R.id.menu_style_size_large) size = 1.25f; else size = null; if (size != null) t.setSpan(new RelativeSizeSpan(size), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); etBody.setText(t); etBody.setSelection(s, e); return true; } private boolean setColor(MenuItem item) { InputMethodManager imm = (InputMethodManager) etBody.getContext().getSystemService(Activity.INPUT_METHOD_SERVICE); if (imm != null) imm.hideSoftInputFromWindow(etBody.getWindowToken(), 0); Context context = etBody.getContext(); int editTextColor = Helper.resolveColor(context, android.R.attr.editTextColor); ColorPickerDialogBuilder builder = ColorPickerDialogBuilder .with(context) .setTitle(R.string.title_color) .showColorEdit(true) .setColorEditTextColor(editTextColor) .wheelType(ColorPickerView.WHEEL_TYPE.FLOWER) .density(6) .lightnessSliderOnly() .setPositiveButton(android.R.string.ok, new ColorPickerClickListener() { @Override public void onClick(DialogInterface dialog, int selectedColor, Integer[] allColors) { _setColor(selectedColor); } }) .setNegativeButton(R.string.title_reset, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { _setColor(null); } }); builder.build().show(); return true; } private void _setColor(Integer color) { for (ForegroundColorSpan span : t.getSpans(s, e, ForegroundColorSpan.class)) t.removeSpan(span); if (color != null) t.setSpan(new ForegroundColorSpan(color), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); etBody.setText(t); etBody.setSelection(s, e); } private boolean setList(MenuItem item) { Context context = etBody.getContext(); int colorAccent = Helper.resolveColor(context, R.attr.colorAccent); int dp3 = Helper.dp2pixels(context, 3); int dp6 = Helper.dp2pixels(context, 6); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); int message_zoom = prefs.getInt("message_zoom", 100); float textSize = Helper.getTextSize(context, 0) * message_zoom / 100f; int start = s; int end = e; // Expand selection at start while (start > 0 && t.charAt(start - 1) != '\n') start--; // Expand selection at end while (end > 0 && end < t.length() && t.charAt(end - 1) != '\n') end++; // Nothing to do if (start == end) return false; // Create paragraph at start if (start == 0 && t.charAt(start) != '\n') { t.insert(0, "\n"); start++; end++; } // Create paragraph at end if (end == t.length() && t.charAt(end - 1) != '\n') { t.append("\n"); end++; } if (end == t.length()) t.append("\n"); // workaround Android bug // Remove existing bullets BulletSpan[] spans = t.getSpans(start, end, BulletSpan.class); for (BulletSpan span : spans) t.removeSpan(span); int i = start; int j = start + 1; int index = 1; while (j < end) { if (i > 0 && t.charAt(i - 1) == '\n' && t.charAt(j) == '\n') { Log.i("Insert " + i + "..." + (j + 1) + " size=" + end); if (item.getItemId() == R.id.menu_style_list_bullets) if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) t.setSpan(new BulletSpan(dp6, colorAccent), i, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH); else t.setSpan(new BulletSpan(dp6, colorAccent, dp3), i, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH); else t.setSpan(new NumberSpan(dp6, colorAccent, textSize, index++), i, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH); i = j + 1; } j++; } etBody.setText(t); etBody.setSelection(start, end); return true; } private boolean setFont(MenuItem item) { TypefaceSpan[] spans = t.getSpans(s, e, TypefaceSpan.class); for (TypefaceSpan span : spans) t.removeSpan(span); int id = item.getItemId(); String[] names = anchor.getResources().getStringArray(R.array.fontNameValues); String face = (id < names.length ? names[id] : null); if (face != null) t.setSpan(new TypefaceSpan(face), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); etBody.setText(t); etBody.setSelection(s, e); return true; } private boolean setBlockquote(MenuItem item) { Context context = etBody.getContext(); int colorPrimary = Helper.resolveColor(context, R.attr.colorPrimary); int dp3 = Helper.dp2pixels(context, 3); int dp6 = Helper.dp2pixels(context, 6); QuoteSpan[] spans = t.getSpans(s, e, QuoteSpan.class); for (QuoteSpan span : spans) t.removeSpan(span); QuoteSpan q; if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) q = new QuoteSpan(colorPrimary); else q = new QuoteSpan(colorPrimary, dp3, dp6); t.setSpan(q, s, e, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); etBody.setText(t); etBody.setSelection(s, e); return true; } private boolean setStrikethrough(MenuItem item) { boolean has = false; for (StrikethroughSpan span : t.getSpans(s, e, StrikethroughSpan.class)) { has = true; t.removeSpan(span); } if (!has) t.setSpan(new StrikethroughSpan(), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); etBody.setText(t); etBody.setSelection(s, e); return true; } private boolean clear(MenuItem item) { for (Object span : t.getSpans(s, e, Object.class)) if (!(span instanceof ImageSpan)) t.removeSpan(span); etBody.setText(t); etBody.setSelection(s, e); return true; } }); popupMenu.show(); return true; } case R.id.menu_link: { String url = (String) args[0]; List spans = new ArrayList<>(); for (Object span : ss.getSpans(start, end, Object.class)) { if (!(span instanceof URLSpan)) spans.add(span); ss.removeSpan(span); } if (url != null) { if (start == end) { etBody.getText().insert(start, url); end += url.length(); ss = new SpannableString(etBody.getText()); } ss.setSpan(new URLSpan(url), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); } // Restore other spans for (Object span : spans) ss.setSpan(span, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); etBody.setText(ss); etBody.setSelection(end, end); return true; } case R.id.menu_clear: { boolean selected = (start != end); if (start == end) { start = 0; end = etBody.length(); } for (Object span : ss.getSpans(start, end, Object.class)) if (!(span instanceof ImageSpan)) ss.removeSpan(span); etBody.setText(ss); if (selected) etBody.setSelection(start, end); return true; } default: return false; } } catch (Throwable ex) { Log.e(ex); return false; } } }