added license GPL

[winnie] / src / window.cc

/*
winnie - an experimental window system

Copyright (C) 2013 Eleni Maria Stea

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 3 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, see <http://www.gnu.org/licenses/>.

Author: Eleni Maria Stea <elene.mst@gmail.com>
*/

#include <algorithm>
#include <stdio.h> //TODO
#include <string.h>

#include "gfx.h"
#include "window.h"
#include "wm.h"

Window::Window()
{
        parent = 0;
        title = 0;
        rect.x = rect.y = 0;
        rect.width = rect.height = 128;
        memset(&callbacks, 0, sizeof callbacks);
        dirty = true;
        managed = true;
        focusable = true;
        state = STATE_NORMAL;
}

Window::~Window()
{
        for(size_t i=0; i<children.size(); i++) {
                wm->remove_window(children[i]);
                delete children[i];
        }

        delete [] title;
}

const Rect &Window::get_rect() const
{
        return rect;
}

Rect Window::get_absolute_rect() const
{
        if(!parent) {
                return rect;
        }

        Rect absolute_rect;
        absolute_rect = parent->get_absolute_rect();

        absolute_rect.x += rect.x;
        absolute_rect.y += rect.y;
        absolute_rect.width = rect.width;
        absolute_rect.height = rect.height;

        return absolute_rect;
}

bool Window::contains_point(int ptr_x, int ptr_y)
{
        Rect abs_rect = get_absolute_rect();
        return ptr_x >= abs_rect.x && ptr_x < abs_rect.x + abs_rect.width &&
                        ptr_y >= abs_rect.y && ptr_y < abs_rect.y + abs_rect.height;
}

void Window::move(int x, int y)
{
        invalidate();   // moved, should redraw, MUST BE CALLED FIRST
        rect.x = x;
        rect.y = y;
}

void Window::resize(int x, int y)
{
        invalidate();   // resized, should redraw, MUST BE CALLED FIRST
        rect.width = x;
        rect.height = y;
}

void Window::set_title(const char *s)
{
        delete [] title;

        title = new char[strlen(s) + 1];
        strcpy(title, s);
}

const char *Window::get_title() const
{
        return title;
}

void Window::invalidate()
{
        dirty = true;
        Rect abs_rect = get_absolute_rect();
        wm->invalidate_region(abs_rect);
}

void Window::draw(Rect *dirty_region)
{
        Rect abs_rect = get_absolute_rect();
        Rect intersect = rect_intersection(abs_rect, *dirty_region);
        if(intersect.width && intersect.height) {
                Rect prev_clip = get_clipping_rect();
                set_clipping_rect(abs_rect);
                
                if(callbacks.display) {
                        callbacks.display(this);
                }
                dirty = false;

                draw_children(abs_rect);
                
                *dirty_region = rect_union(*dirty_region, abs_rect);
                set_clipping_rect(prev_clip);
        }
}

void Window::draw_children(const Rect &dirty_region)
{
        Rect drect = dirty_region;
        for(size_t i=0; i<children.size(); i++) {
                children[i]->draw(&drect);
        }
}

unsigned char *Window::get_win_start_on_fb()
{
        unsigned char *fb = get_framebuffer();
        Rect abs_rect = get_absolute_rect();
        return fb + get_color_depth() * (get_screen_size().x * abs_rect.y + abs_rect.x) / 8;
}

int Window::get_scanline_width()
{
        return get_screen_size().x;
}

void Window::set_managed(bool managed)
{
        this->managed = managed;
}

bool Window::get_managed() const
{
        return managed;
}

void Window::set_focusable(bool focusable)
{
        this->focusable = focusable;
}

bool Window::get_focusable() const
{
        return focusable;
}

bool Window::get_dirty() const
{
        return dirty;
}

void Window::set_display_callback(DisplayFuncType func)
{
        callbacks.display = func;
}

void Window::set_keyboard_callback(KeyboardFuncType func)
{
        callbacks.keyboard = func;
}

void Window::set_mouse_button_callback(MouseButtonFuncType func)
{
        callbacks.button = func;
}

void Window::set_mouse_motion_callback(MouseMotionFuncType func)
{
        callbacks.motion = func;
}

const DisplayFuncType Window::get_display_callback() const
{
        return callbacks.display;
}

const KeyboardFuncType Window::get_keyboard_callback() const
{
        return callbacks.keyboard;
}

const MouseButtonFuncType Window::get_mouse_button_callback() const
{
        return callbacks.button;
}

const MouseMotionFuncType Window::get_mouse_motion_callback() const
{
        return callbacks.motion;
}

void Window::add_child(Window *win)
{
        children.push_back(win);
        if(win->parent) {
                win->parent->remove_child(win);
        }
        win->parent = this;
}

void Window::remove_child(Window *win)
{
        std::vector<Window*>::iterator it;
        it = std::find(children.begin(), children.end(), win);
        if(it != children.end()) {
                children.erase(it);
                win->parent = 0;
        }
}

Window **Window::get_children()
{
        if(children.empty()) {
                return 0;
        }
        return &children[0];
}

int Window::get_children_count() const
{
        return (int)children.size();
}

const Window *Window::get_parent() const
{
        return parent;
}

Window *Window::get_parent()
{
        return parent;
}

void Window::set_state(State state)
{
        this->state = state;
}

Window::State Window::get_state() const
{
        return state;
}