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/* edit.cc |
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* This file is part of NDK++ library |
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* Copyright (c) 2003,2004 by Stanislav Ievlev |
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* |
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* This file is covered by the GNU Library General Public License, |
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* which should be included with libndk++ as the file COPYING. |
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*/ |
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#include <ndk++/application.hh> |
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#include <ndk++/edit.hh> |
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#include <ndk++/packer.hh> |
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#include <ndk++/palette.hh> |
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#include <ncurses/pen.hh> |
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#include <cctype> |
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using ndk::edit; |
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edit::edit (std::string const &str, panel *parent, bool accept) |
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: button (str, parent, accept) |
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, current_ (0) |
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, begin_ (0) |
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, mode_ (normal) |
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{ |
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events ()->on_keyboard (slot (&edit::at_keyboard, this)); |
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events ()->on_system (slot (&edit::at_system, this)); |
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} |
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void |
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edit::resize (int size) |
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{ |
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button::resize (size, 1); |
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} |
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void |
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edit::set_text (std::string const &str) |
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{ |
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label::set_text (str); |
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current_ = text_.length (); |
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draw (); |
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} |
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void |
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edit::set_mode (echo_mode mode) |
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{ |
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mode_ = mode; |
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} |
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void |
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edit::change_color () |
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{ |
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ncurses::pen (*this).set_color (palette::instance () |
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[ |
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state_ == engine::enter_focus |
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? colors::edit_active |
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: colors::edit_inactive |
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]); |
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} |
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void |
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edit::draw () |
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{ |
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/* first process flags */ |
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std::string out; |
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switch (mode_) |
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{ |
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case normal: |
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out.assign (text ()); |
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break; |
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case no_echo: |
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out.assign (""); |
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break; |
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case password: |
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out.assign (std::string (text ().size (), '*')); |
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break; |
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default: |
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break; |
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} |
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label::draw (out, begin_); /* and draw */ |
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set_cursor (); /* and finally update cursor position */ |
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ncurses::pen (*this).commit (); /* commit changes to the screen */ |
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} |
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ndk::event::result |
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edit::at_system (event const &ev) |
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{ |
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event::result res = event::ignored; |
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if (!ev.sender_) |
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{ |
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if (engine::enter_focus == ev.type_) |
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{ |
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app ().cursor_on (); |
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set_cursor (); /* only set cursor position, don't need full redraw */ |
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res = event::accepted; |
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} |
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else if (engine::leave_focus == ev.type_) |
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{ |
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app ().cursor_off (); |
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res = event::accepted; |
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} |
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} |
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return res; |
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} |
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ndk::event::result |
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edit::at_keyboard (keyboard const &ev) |
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{ |
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event::result res = event::ignored; |
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unsigned int pos = current_; |
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switch (ev.code ()) |
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{ |
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case key::right: |
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(scroll_right ()) ? draw () : set_cursor (); |
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res = event::accepted; |
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break; |
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case key::left: |
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(scroll_left ()) ? draw () : set_cursor (); |
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res = event::accepted; |
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break; |
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case key::backspace: |
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--pos; /* try to go to previous position */ |
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if (pos < text_.length ()) |
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{ |
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erase (pos); |
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scroll_left (); /* scroll all view to the left */ |
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draw (); /* we always need full redraw */ |
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res = event::accepted; |
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} |
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break; |
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case key::dc: |
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if (pos < text_.length ()) |
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{ |
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erase (pos); |
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draw (); /* we always need full redraw */ |
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res = event::accepted; |
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} |
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break; |
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case key::home: |
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begin_ = 0; |
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current_ = 0; |
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draw (); |
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res = event::accepted; |
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break; |
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case key::end: |
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current_ = text_.length (); |
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(recalibrate ()) ? draw () : set_cursor (); |
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res = event::accepted; |
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break; |
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case '\r': |
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on_commit_ (text_); |
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break; |
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case '\t': /* don't beep on tab */ |
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break; |
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default: /* enter key to the string */ |
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if (std::isprint (int (ev.code ()))) |
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{ |
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insert (pos, char (ev.code ())); |
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scroll_right (); |
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draw (); /* we always need full redraw */ |
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res = event::accepted; |
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} |
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#if 0 |
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else |
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throw ev.code (); |
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#endif |
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break; |
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} |
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return res; |
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} |
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bool |
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edit::scroll_right () |
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{ |
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if (current_ < int (text_.length ())) |
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++current_; /* increase current */ |
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/* recalibrate begin, decide are we need to redraw */ |
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return recalibrate (); |
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} |
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bool |
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edit::scroll_left () |
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{ |
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if (current_ > 0) |
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--current_; /* decrease current */ |
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/* recalibrate begin, decide are we need to redraw */ |
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return recalibrate (); |
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} |
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bool |
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edit::recalibrate () |
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{ |
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bool res = false; |
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if ((begin_ < current_) && ((current_ - begin_) > (width () - 1))) |
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{ |
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/* may be cursor is over(after) edit screen? */ |
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begin_ = current_ - width () + 1; |
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res = true; |
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} |
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else if (begin_ > current_) |
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{ |
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/* may be cursor is over(before) edit screen? */ |
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begin_ = current_; |
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res = true; |
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} |
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return res; |
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} |
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void |
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edit::set_cursor () |
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{ |
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/* always move to zero position in no_echo mode */ |
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return_unless (ncurses::pen (*this).move (mode_ != no_echo ? current_ - begin_ : 0, 0)); |
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ncurses::pen (*this).commit (); |
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} |
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void |
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edit::insert (int pos, char sym) |
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{ |
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text_.insert (text_.begin () + pos, sym); /* default mode is insert mode */ |
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} |
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void |
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edit::erase (int pos) |
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{ |
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text_.erase (text_.begin () + pos); |
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} |
