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Copy pathscrollpad.cpp
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292 lines (263 loc) · 7.08 KB
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/***************************************************************************
* Copyright (C) 2008-2014 by Andrzej Rybczak *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <cassert>
#include <boost/regex.hpp>
#include <iostream>
#include "scrollpad.h"
namespace {//
template <typename PropT>
bool regexSearch(NC::Buffer &buf, PropT begin, const std::string &ws, PropT end, size_t id, boost::regex::flag_type flags)
{
try {
boost::regex rx(ws, flags);
auto first = boost::sregex_iterator(buf.str().begin(), buf.str().end(), rx);
auto last = boost::sregex_iterator();
bool success = first != last;
for (; first != last; ++first)
{
buf.setProperty(first->position(), begin, id);
buf.setProperty(first->position() + first->length(), end, id);
}
return success;
} catch (boost::bad_expression &e) {
std::cerr << "regexSearch: bad_expression: " << e.what() << "\n";
return false;
}
}
}
namespace NC {//
Scrollpad::Scrollpad(size_t startx,
size_t starty,
size_t width,
size_t height,
const std::string &title,
Color color,
Border border)
: Window(startx, starty, width, height, title, color, border),
m_beginning(0),
m_real_height(height)
{
}
void Scrollpad::refresh()
{
assert(m_real_height >= m_height);
size_t max_beginning = m_real_height - m_height;
m_beginning = std::min(m_beginning, max_beginning);
prefresh(m_window, m_beginning, 0, m_start_y, m_start_x, m_start_y+m_height-1, m_start_x+m_width-1);
}
void Scrollpad::resize(size_t new_width, size_t new_height)
{
adjustDimensions(new_width, new_height);
recreate(new_width, new_height);
flush();
}
void Scrollpad::scroll(Scroll where)
{
assert(m_real_height >= m_height);
size_t max_beginning = m_real_height - m_height;
switch (where)
{
case Scroll::Up:
{
if (m_beginning > 0)
--m_beginning;
break;
}
case Scroll::Down:
{
if (m_beginning < max_beginning)
++m_beginning;
break;
}
case Scroll::PageUp:
{
if (m_beginning > m_height)
m_beginning -= m_height;
else
m_beginning = 0;
break;
}
case Scroll::PageDown:
{
m_beginning = std::min(m_beginning + m_height, max_beginning);
break;
}
case Scroll::Home:
{
m_beginning = 0;
break;
}
case Scroll::End:
{
m_beginning = max_beginning;
break;
}
}
}
void Scrollpad::clear()
{
m_real_height = m_height;
m_buffer.clear();
werase(m_window);
delwin(m_window);
m_window = newpad(m_height, m_width);
setTimeout(m_window_timeout);
setColor(m_color, m_bg_color);
keypad(m_window, 1);
}
const std::string &Scrollpad::buffer()
{
return m_buffer.str();
}
void Scrollpad::flush()
{
auto &w = static_cast<Window &>(*this);
const auto &s = m_buffer.str();
const auto &ps = m_buffer.properties();
auto p = ps.begin();
size_t i = 0;
auto load_properties = [&]() {
for (; p != ps.end() && p->position() == i; ++p)
w << *p;
};
auto write_whitespace = [&]() {
for (; i < s.length() && iswspace(s[i]); ++i)
{
load_properties();
w << s[i];
}
};
auto write_word = [&](bool load_properties_) {
for (; i < s.length() && !iswspace(s[i]); ++i)
{
if (load_properties_)
load_properties();
w << s[i];
}
};
auto write_buffer = [&](bool generate_height_only) -> size_t {
int new_y;
size_t height = 1;
size_t old_i;
auto old_p = p;
int x, y;
i = 0;
p = ps.begin();
y = getY();
while (i < s.length())
{
// write all whitespaces.
write_whitespace();
// if we are generating height, check difference
// between previous Y coord and current one and
// update height accordingly.
if (generate_height_only)
{
new_y = getY();
height += new_y - y;
y = new_y;
}
if (i == s.length())
break;
// save current string position state and get current
// coordinates as we are before the beginning of a word.
old_i = i;
old_p = p;
x = getX();
y = getY();
// write word to test if it overflows, but do not load properties
// yet since if it overflows, we do not want to load them twice.
write_word(false);
// restore previous indexes state
i = old_i;
p = old_p;
// get new Y coord to see if word overflew into next line.
new_y = getY();
if (new_y != y)
{
if (generate_height_only)
{
// if it did, let's update height...
++height;
}
else
{
// ...or go to old coordinates, erase
// part of the string from previous line...
goToXY(x, y);
wclrtoeol(m_window);
}
// ...start at the beginning of next line...
++y;
goToXY(0, y);
// ...write word again, this time with properties...
write_word(true);
if (generate_height_only)
{
// ... and check for potential
// difference in Y coordinates again.
new_y = getY();
height += new_y - y;
}
}
else
{
// word didn't overflow, rewrite it with properties.
goToXY(x, y);
write_word(true);
}
if (generate_height_only)
{
// move to the first line, since when we do
// generation, m_real_height = m_height and we
// don't have many lines to use.
goToXY(getX(), 0);
y = 0;
}
}
// load remaining properties if there are any
for (; p != ps.end(); ++p)
w << *p;
return height;
};
m_real_height = std::max(write_buffer(true), m_height);
if (m_real_height > m_height)
recreate(m_width, m_real_height);
else
werase(m_window);
write_buffer(false);
}
void Scrollpad::reset()
{
m_beginning = 0;
}
bool Scrollpad::setProperties(Color begin, const std::string &s, Color end, size_t id, boost::regex::flag_type flags)
{
return regexSearch(m_buffer, begin, s, end, id, flags);
}
bool Scrollpad::setProperties(Format begin, const std::string &s, Format end, size_t id, boost::regex::flag_type flags)
{
return regexSearch(m_buffer, begin, s, end, id, flags);
}
void Scrollpad::removeProperties(size_t id)
{
m_buffer.removeProperties(id);
}
}