FairEmail/app/src/main/java/eu/faircode/email/StyleHelper.java

408 lines
17 KiB
Java
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package eu.faircode.email;
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import android.app.Activity;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.SharedPreferences;
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import android.graphics.Typeface;
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import android.os.Build;
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import android.text.SpannableString;
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import android.text.SpannableStringBuilder;
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import android.text.Spanned;
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import android.text.style.BulletSpan;
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import android.text.style.ForegroundColorSpan;
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import android.text.style.ImageSpan;
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import android.text.style.QuoteSpan;
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import android.text.style.RelativeSizeSpan;
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import android.text.style.StrikethroughSpan;
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import android.text.style.StyleSpan;
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import android.text.style.TypefaceSpan;
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import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
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import android.view.MenuItem;
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import android.view.SubMenu;
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import android.view.View;
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import android.view.inputmethod.InputMethodManager;
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import android.widget.EditText;
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import androidx.appcompat.widget.PopupMenu;
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import androidx.preference.PreferenceManager;
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import com.flask.colorpicker.ColorPickerView;
import com.flask.colorpicker.builder.ColorPickerClickListener;
import com.flask.colorpicker.builder.ColorPickerDialogBuilder;
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import java.util.ArrayList;
import java.util.List;
public class StyleHelper {
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static boolean apply(int action, View anchor, EditText etBody, Object... args) {
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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;
}
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case R.id.menu_style: {
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final int s = start;
final int e = end;
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final SpannableStringBuilder t = new SpannableStringBuilder(ss);
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PopupMenu popupMenu = new PopupMenu(anchor.getContext(), anchor);
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popupMenu.inflate(R.menu.popup_style);
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String[] fontNames = anchor.getResources().getStringArray(R.array.fontNameNames);
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SubMenu smenu = popupMenu.getMenu().findItem(R.id.menu_style_font).getSubMenu();
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for (int i = 0; i < fontNames.length; i++)
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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);
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popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
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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);
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case R.id.group_style_blockquote:
return setBlockquote(item);
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case R.id.group_style_strikethrough:
return setStrikethrough(item);
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case R.id.group_style_clear:
return clear(item);
default:
return false;
}
} catch (Throwable ex) {
Log.e(ex);
return false;
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}
}
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private boolean setSize(MenuItem item) {
RelativeSizeSpan[] spans = t.getSpans(s, e, RelativeSizeSpan.class);
for (RelativeSizeSpan span : spans)
t.removeSpan(span);
Float size;
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if (item.getItemId() == R.id.menu_style_size_small)
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size = 0.8f;
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else if (item.getItemId() == R.id.menu_style_size_large)
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size = 1.25f;
else
size = null;
if (size != null)
t.setSpan(new RelativeSizeSpan(size), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
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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);
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Context context = etBody.getContext();
int editTextColor = Helper.resolveColor(context, android.R.attr.editTextColor);
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ColorPickerDialogBuilder builder = ColorPickerDialogBuilder
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.with(context)
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.setTitle(R.string.title_color)
.showColorEdit(true)
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.setColorEditTextColor(editTextColor)
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.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);
}
});
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builder.build().show();
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return true;
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}
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private void _setColor(Integer color) {
for (ForegroundColorSpan span : t.getSpans(s, e, ForegroundColorSpan.class))
t.removeSpan(span);
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if (color != null)
t.setSpan(new ForegroundColorSpan(color), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
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etBody.setText(t);
etBody.setSelection(s, e);
}
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private boolean setList(MenuItem item) {
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Context context = etBody.getContext();
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int colorAccent = Helper.resolveColor(context, R.attr.colorAccent);
int dp3 = Helper.dp2pixels(context, 3);
int dp6 = Helper.dp2pixels(context, 6);
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SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
int message_zoom = prefs.getInt("message_zoom", 100);
float textSize = Helper.getTextSize(context, 0) * message_zoom / 100f;
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int start = s;
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int end = e;
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// 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;
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// Create paragraph at start
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if (start == 0 && t.charAt(start) != '\n') {
t.insert(0, "\n");
start++;
end++;
}
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// Create paragraph at end
if (end == t.length() && t.charAt(end - 1) != '\n') {
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t.append("\n");
end++;
}
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if (end == t.length())
t.append("\n"); // workaround Android bug
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// Remove existing bullets
BulletSpan[] spans = t.getSpans(start, end, BulletSpan.class);
for (BulletSpan span : spans)
t.removeSpan(span);
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int i = start;
int j = start + 1;
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int index = 1;
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while (j < end) {
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if (i > 0 && t.charAt(i - 1) == '\n' && t.charAt(j) == '\n') {
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Log.i("Insert " + i + "..." + (j + 1) + " size=" + end);
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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);
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else
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t.setSpan(new NumberSpan(dp6, colorAccent, textSize, index++), i, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH);
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i = j + 1;
}
j++;
}
etBody.setText(t);
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etBody.setSelection(start, end);
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return true;
}
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private boolean setFont(MenuItem item) {
TypefaceSpan[] spans = t.getSpans(s, e, TypefaceSpan.class);
for (TypefaceSpan span : spans)
t.removeSpan(span);
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int id = item.getItemId();
String[] names = anchor.getResources().getStringArray(R.array.fontNameValues);
String face = (id < names.length ? names[id] : null);
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if (face != null)
t.setSpan(new TypefaceSpan(face), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(t);
etBody.setSelection(s, e);
return true;
}
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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;
}
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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;
}
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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();
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return true;
}
case R.id.menu_link: {
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String url = (String) args[0];
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List<Object> spans = new ArrayList<>();
for (Object span : ss.getSpans(start, end, Object.class)) {
if (!(span instanceof URLSpan))
spans.add(span);
ss.removeSpan(span);
}
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if (url != null) {
if (start == end) {
etBody.getText().insert(start, url);
end += url.length();
ss = new SpannableString(etBody.getText());
}
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ss.setSpan(new URLSpan(url), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
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// Restore other spans
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for (Object span : spans)
ss.setSpan(span, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(ss);
etBody.setSelection(end, end);
return true;
}
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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;
}
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default:
return false;
}
} catch (Throwable ex) {
Log.e(ex);
return false;
}
}
}