MarkdownInputEditor.java 文件源码

/**
 * Used to get the correct selection end range depending on the text size
 * of the preferred mark_down styling.
 *
 * @param selection The menu item from the selection mode
 * @return end selection size with applied offset
 */
private int getSelectionEnd(@IdRes int selection) {
    int end = getSelectionEnd();
    final int init_end = getSelectionEnd();
    switch (selection) {
        case R.id.menu_bold:
            end += MD_BOLD.length();
            break;
        case R.id.menu_italic:
            end += MD_ITALIC.length();
            break;
        case R.id.menu_strike:
            end += MD_STRIKE.length();
            break;
        case R.id.menu_list:
            end += MD_NUMBER.length();
            break;
        case R.id.menu_bullet:
            end += MD_BULLET.length();
            break;
        case R.id.menu_heading:
            end += MD_HEADING.length();
            break;
        case R.id.menu_center:
            end += MD_CENTER_ALIGN.length();
            break;
        case R.id.menu_quote:
            end += MD_QUOTE.length();
            break;
        case R.id.menu_code:
            end += MD_CODE.length();
            break;
    }
    // Rare case but if it ever happens reduce end by 1
    final int text_length = getText().length();
    if(end > text_length + (end - init_end))
        end -= (end - init_end) - 1;
    return end;
}