1248 lines
32 KiB
C++
1248 lines
32 KiB
C++
/*
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* \brief Nitpicker main program for Genode
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* \author Norman Feske
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* \date 2006-08-04
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*/
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/*
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* Copyright (C) 2006-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/env.h>
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#include <base/sleep.h>
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#include <base/printf.h>
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#include <base/allocator_guard.h>
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#include <os/attached_ram_dataspace.h>
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#include <input/event.h>
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#include <input/keycodes.h>
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#include <root/component.h>
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#include <dataspace/client.h>
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#include <timer_session/connection.h>
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#include <input_session/connection.h>
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#include <input_session/input_session.h>
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#include <nitpicker_session/nitpicker_session.h>
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#include <framebuffer_session/connection.h>
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#include <util/color.h>
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#include <os/pixel_rgb565.h>
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#include <os/session_policy.h>
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#include <os/server.h>
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#include <os/reporter.h>
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/* local includes */
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#include "input.h"
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#include "big_mouse.h"
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#include "background.h"
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#include "clip_guard.h"
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#include "mouse_cursor.h"
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#include "chunky_menubar.h"
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namespace Input { class Session_component; }
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namespace Framebuffer { class Session_component; }
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namespace Nitpicker {
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class Session_component;
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template <typename> class Root;
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struct Main;
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}
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using Genode::size_t;
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using Genode::Allocator;
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using Genode::Rpc_entrypoint;
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using Genode::List;
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using Genode::Pixel_rgb565;
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using Genode::strcmp;
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using Genode::config;
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using Genode::env;
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using Genode::Arg_string;
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using Genode::Object_pool;
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using Genode::Dataspace_capability;
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using Genode::Session_label;
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using Genode::Signal_transmitter;
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using Genode::Signal_context_capability;
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using Genode::Signal_rpc_member;
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using Genode::Attached_ram_dataspace;
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using Genode::Attached_dataspace;
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using Genode::Weak_ptr;
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using Genode::Locked_ptr;
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Framebuffer::Session *tmp_fb;
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/***************
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** Utilities **
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***************/
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/*
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* Font initialization
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*/
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extern char _binary_default_tff_start;
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Text_painter::Font default_font(&_binary_default_tff_start);
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template <typename PT>
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struct Screen : public Canvas<PT>
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{
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Screen(PT *base, Area size) : Canvas<PT>(base, size) { }
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};
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class Buffer
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{
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private:
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Area _size;
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Framebuffer::Mode::Format _format;
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Genode::Attached_ram_dataspace _ram_ds;
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public:
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/**
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* Constructor - allocate and map dataspace for virtual frame buffer
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*
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* \throw Ram_session::Alloc_failed
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* \throw Rm_session::Attach_failed
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*/
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Buffer(Area size, Framebuffer::Mode::Format format, Genode::size_t bytes)
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:
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_size(size), _format(format),
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_ram_ds(env()->ram_session(), bytes)
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{ }
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/**
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* Accessors
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*/
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Genode::Ram_dataspace_capability ds_cap() const { return _ram_ds.cap(); }
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Area size() const { return _size; }
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Framebuffer::Mode::Format format() const { return _format; }
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void *local_addr() const { return _ram_ds.local_addr<void>(); }
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};
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/**
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* Interface for triggering the re-allocation of a virtual framebuffer
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*
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* Used by 'Framebuffer::Session_component',
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* implemented by 'Nitpicker::Session_component'
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*/
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struct Buffer_provider
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{
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virtual Buffer *realloc_buffer(Framebuffer::Mode mode, bool use_alpha) = 0;
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};
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template <typename PT>
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class Chunky_dataspace_texture : public Buffer,
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public Texture<PT>
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{
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private:
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Framebuffer::Mode::Format _format() {
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return Framebuffer::Mode::RGB565; }
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/**
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* Return base address of alpha channel or 0 if no alpha channel exists
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*/
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unsigned char *_alpha_base(Area size, bool use_alpha)
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{
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if (!use_alpha) return 0;
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/* alpha values come right after the pixel values */
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return (unsigned char *)local_addr() + calc_num_bytes(size, false);
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}
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public:
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/**
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* Constructor
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*/
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Chunky_dataspace_texture(Area size, bool use_alpha)
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:
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Buffer(size, _format(), calc_num_bytes(size, use_alpha)),
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Texture<PT>((PT *)local_addr(),
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_alpha_base(size, use_alpha), size) { }
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static Genode::size_t calc_num_bytes(Area size, bool use_alpha)
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{
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/*
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* If using an alpha channel, the alpha buffer follows the
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* pixel buffer. The alpha buffer is followed by an input
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* mask buffer. Hence, we have to account one byte per
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* alpha value and one byte for the input mask value.
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*/
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Genode::size_t bytes_per_pixel = sizeof(PT) + (use_alpha ? 2 : 0);
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return bytes_per_pixel*size.w()*size.h();
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}
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unsigned char *input_mask_buffer()
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{
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if (!Texture<PT>::alpha()) return 0;
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Area const size = Texture<PT>::size();
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/* input-mask values come right after the alpha values */
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return (unsigned char *)local_addr() + calc_num_bytes(size, false)
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+ size.count();
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}
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};
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/***********************
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** Input sub session **
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***********************/
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class Input::Session_component : public Genode::Rpc_object<Session>
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{
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public:
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enum { MAX_EVENTS = 200 };
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static size_t ev_ds_size() {
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return Genode::align_addr(MAX_EVENTS*sizeof(Event), 12); }
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private:
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/*
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* Exported event buffer dataspace
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*/
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Attached_ram_dataspace _ev_ram_ds = { env()->ram_session(), ev_ds_size() };
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/*
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* Local event buffer that is copied
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* to the exported event buffer when
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* flush() gets called.
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*/
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Event _ev_buf[MAX_EVENTS];
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unsigned _num_ev = 0;
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Signal_context_capability _sigh;
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public:
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/**
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* Wake up client
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*/
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void submit_signal()
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{
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if (_sigh.valid())
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Signal_transmitter(_sigh).submit();
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}
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/**
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* Enqueue event into local event buffer of the input session
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*/
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void submit(const Event *ev)
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{
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/* drop event when event buffer is full */
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if (_num_ev >= MAX_EVENTS) return;
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/* insert event into local event buffer */
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_ev_buf[_num_ev++] = *ev;
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submit_signal();
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}
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/*****************************
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** Input session interface **
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*****************************/
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Dataspace_capability dataspace() override { return _ev_ram_ds.cap(); }
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bool is_pending() const override { return _num_ev > 0; }
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int flush() override
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{
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unsigned ev_cnt;
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/* copy events from local event buffer to exported buffer */
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Event *ev_ds_buf = _ev_ram_ds.local_addr<Event>();
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for (ev_cnt = 0; ev_cnt < _num_ev; ev_cnt++)
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ev_ds_buf[ev_cnt] = _ev_buf[ev_cnt];
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_num_ev = 0;
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return ev_cnt;
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}
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void sigh(Genode::Signal_context_capability sigh) override { _sigh = sigh; }
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};
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/*****************************
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** Framebuffer sub session **
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*****************************/
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class Framebuffer::Session_component : public Genode::Rpc_object<Session>
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{
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private:
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::Buffer *_buffer = 0;
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View_stack &_view_stack;
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::Session &_session;
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Framebuffer::Session &_framebuffer;
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Buffer_provider &_buffer_provider;
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Signal_context_capability _mode_sigh;
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Signal_context_capability _sync_sigh;
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Framebuffer::Mode _mode;
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bool _alpha = false;
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public:
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/**
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* Constructor
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*/
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Session_component(View_stack &view_stack,
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::Session &session,
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Framebuffer::Session &framebuffer,
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Buffer_provider &buffer_provider)
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:
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_view_stack(view_stack),
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_session(session),
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_framebuffer(framebuffer),
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_buffer_provider(buffer_provider)
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{ }
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/**
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* Change virtual framebuffer mode
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*
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* Called by Nitpicker::Session_component when re-dimensioning the
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* buffer.
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*
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* The new mode does not immediately become active. The client can
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* keep using an already obtained framebuffer dataspace. However,
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* we inform the client about the mode change via a signal. If the
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* client calls 'dataspace' the next time, the new mode becomes
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* effective.
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*/
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void notify_mode_change(Framebuffer::Mode mode, bool alpha)
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{
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_mode = mode;
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_alpha = alpha;
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if (_mode_sigh.valid())
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Signal_transmitter(_mode_sigh).submit();
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}
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void submit_sync()
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{
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if (_sync_sigh.valid())
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Signal_transmitter(_sync_sigh).submit();
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}
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/************************************
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** Framebuffer::Session interface **
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************************************/
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Dataspace_capability dataspace() override
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{
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_buffer = _buffer_provider.realloc_buffer(_mode, _alpha);
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return _buffer ? _buffer->ds_cap() : Genode::Ram_dataspace_capability();
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}
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Mode mode() const override { return _mode; }
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void mode_sigh(Signal_context_capability sigh) override
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{
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_mode_sigh = sigh;
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}
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void sync_sigh(Signal_context_capability sigh) override
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{
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_sync_sigh = sigh;
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}
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void refresh(int x, int y, int w, int h) override
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{
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Rect const rect(Point(x, y), Area(w, h));
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_view_stack.mark_session_views_as_dirty(_session, rect);
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}
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};
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/*****************************************
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** Implementation of Nitpicker service **
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*****************************************/
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class Nitpicker::Session_component : public Genode::Rpc_object<Session>,
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public ::Session,
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public Buffer_provider
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{
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private:
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typedef ::View View;
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Genode::Allocator_guard _session_alloc;
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Framebuffer::Session &_framebuffer;
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/* Framebuffer_session_component */
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Framebuffer::Session_component _framebuffer_session_component;
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/* Input_session_component */
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Input::Session_component _input_session_component;
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/*
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* Entrypoint that is used for the views, input session,
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* and framebuffer session.
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*/
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Rpc_entrypoint &_ep;
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View_stack &_view_stack;
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Mode &_mode;
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List<Session_view_list_elem> _view_list;
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Genode::Tslab<View, 4000> _view_alloc { &_session_alloc };
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/* capabilities for sub sessions */
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Framebuffer::Session_capability _framebuffer_session_cap;
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Input::Session_capability _input_session_cap;
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bool const _provides_default_bg;
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/* size of currently allocated virtual framebuffer, in bytes */
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size_t _buffer_size = 0;
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Attached_ram_dataspace _command_ds { env()->ram_session(),
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sizeof(Command_buffer) };
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Command_buffer &_command_buffer = *_command_ds.local_addr<Command_buffer>();
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typedef Genode::Handle_registry<View_handle, View> View_handle_registry;
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View_handle_registry _view_handle_registry;
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void _release_buffer()
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{
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if (!::Session::texture())
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return;
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typedef Pixel_rgb565 PT;
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/* retrieve pointer to texture from session */
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Chunky_dataspace_texture<PT> const *cdt =
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static_cast<Chunky_dataspace_texture<PT> const *>(::Session::texture());
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::Session::texture(0, false);
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::Session::input_mask(0);
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destroy(&_session_alloc, const_cast<Chunky_dataspace_texture<PT> *>(cdt));
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_session_alloc.upgrade(_buffer_size);
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_buffer_size = 0;
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}
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/**
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* Helper for performing sanity checks in OP_TO_FRONT and OP_TO_BACK
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*
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* We have to check for the equality of both the specified view and
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* neighbor. If both arguments refer to the same view, the creation of
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* locked pointers for both views would result in a deadlock.
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*/
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bool _views_are_equal(View_handle v1, View_handle v2)
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{
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if (!v1.valid() || !v2.valid())
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return false;
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Weak_ptr<View> v1_ptr = _view_handle_registry.lookup(v1);
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Weak_ptr<View> v2_ptr = _view_handle_registry.lookup(v2);
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return v1_ptr == v2_ptr;
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}
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bool _focus_change_permitted() const
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{
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::Session * const focused_session = _mode.focused_session();
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/*
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* If no session is focused, we allow any client to assign it. This
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* is useful for programs such as an initial login window that
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* should receive input events without prior manual selection via
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* the mouse.
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*
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* In principle, a client could steal the focus during time between
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* a currently focused session gets closed and before the user
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* manually picks a new session. However, in practice, the focus
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* policy during application startup and exit is managed by a
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* window manager that sits between nitpicker and the application.
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*/
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if (!focused_session)
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return true;
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/*
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* Check if the currently focused session label belongs to a
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* session subordinated to the caller, i.e., it originated from
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* a child of the caller or from the same process. This is the
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* case if the first part of the focused session label is
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* identical to the caller's label.
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*/
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char const * const focused_label = focused_session->label().string();
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char const * const caller_label = label().string();
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return strcmp(focused_label, caller_label, Genode::strlen(caller_label)) == 0;
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}
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void _execute_command(Command const &command)
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{
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switch (command.opcode) {
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case Command::OP_GEOMETRY:
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{
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Locked_ptr<View> view(_view_handle_registry.lookup(command.geometry.view));
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if (!view.is_valid())
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return;
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Point pos = command.geometry.rect.p1();
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/* transpose y position of top-level views by vertical session offset */
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if (view->top_level())
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pos = pos + Point(0, v_offset());
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if (view.is_valid())
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_view_stack.geometry(*view, Rect(pos, command.geometry.rect.area()));
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return;
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}
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case Command::OP_OFFSET:
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{
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Locked_ptr<View> view(_view_handle_registry.lookup(command.geometry.view));
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if (view.is_valid())
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_view_stack.buffer_offset(*view, command.offset.offset);
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return;
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}
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case Command::OP_TO_FRONT:
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{
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if (_views_are_equal(command.to_front.view, command.to_front.neighbor))
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return;
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Locked_ptr<View> view(_view_handle_registry.lookup(command.to_front.view));
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if (!view.is_valid())
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return;
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/* bring to front if no neighbor is specified */
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if (!command.to_front.neighbor.valid()) {
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_view_stack.stack(*view, nullptr, true);
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return;
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}
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/* stack view relative to neighbor */
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Locked_ptr<View> neighbor(_view_handle_registry.lookup(command.to_front.neighbor));
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if (neighbor.is_valid())
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_view_stack.stack(*view, &(*neighbor), false);
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return;
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}
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case Command::OP_TO_BACK:
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{
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if (_views_are_equal(command.to_front.view, command.to_front.neighbor))
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return;
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Locked_ptr<View> view(_view_handle_registry.lookup(command.to_back.view));
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if (!view.is_valid())
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return;
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/* bring to front if no neighbor is specified */
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if (!command.to_front.neighbor.valid()) {
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_view_stack.stack(*view, nullptr, false);
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return;
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}
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/* stack view relative to neighbor */
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Locked_ptr<View> neighbor(_view_handle_registry.lookup(command.to_back.neighbor));
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if (neighbor.is_valid())
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_view_stack.stack(*view, &(*neighbor), true);
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return;
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}
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case Command::OP_BACKGROUND:
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{
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if (_provides_default_bg) {
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Locked_ptr<View> view(_view_handle_registry.lookup(command.to_front.view));
|
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if (!view.is_valid())
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return;
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view->background(true);
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_view_stack.default_background(*view);
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return;
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}
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|
|
/* revert old background view to normal mode */
|
|
if (::Session::background())
|
|
::Session::background()->background(false);
|
|
|
|
/* assign session background */
|
|
Locked_ptr<View> view(_view_handle_registry.lookup(command.to_front.view));
|
|
if (!view.is_valid())
|
|
return;
|
|
|
|
::Session::background(&(*view));
|
|
|
|
/* switch background view to background mode */
|
|
if (::Session::background())
|
|
view->background(true);
|
|
|
|
return;
|
|
}
|
|
|
|
case Command::OP_TITLE:
|
|
{
|
|
Locked_ptr<View> view(_view_handle_registry.lookup(command.title.view));
|
|
|
|
if (view.is_valid())
|
|
_view_stack.title(*view, command.title.title.string());
|
|
|
|
return;
|
|
}
|
|
|
|
case Command::OP_NOP:
|
|
return;
|
|
}
|
|
}
|
|
|
|
void _destroy_view(View &view)
|
|
{
|
|
_view_stack.remove_view(view);
|
|
_ep.dissolve(&view);
|
|
_view_list.remove(&view);
|
|
destroy(_view_alloc, &view);
|
|
}
|
|
|
|
public:
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
Session_component(Session_label const &label,
|
|
View_stack &view_stack,
|
|
Mode &mode,
|
|
Rpc_entrypoint &ep,
|
|
Framebuffer::Session &framebuffer,
|
|
int v_offset,
|
|
bool provides_default_bg,
|
|
bool stay_top,
|
|
Allocator &session_alloc,
|
|
size_t ram_quota)
|
|
:
|
|
::Session(label, v_offset, stay_top),
|
|
_session_alloc(&session_alloc, ram_quota),
|
|
_framebuffer(framebuffer),
|
|
_framebuffer_session_component(view_stack, *this, framebuffer, *this),
|
|
_ep(ep), _view_stack(view_stack), _mode(mode),
|
|
_framebuffer_session_cap(_ep.manage(&_framebuffer_session_component)),
|
|
_input_session_cap(_ep.manage(&_input_session_component)),
|
|
_provides_default_bg(provides_default_bg),
|
|
_view_handle_registry(_session_alloc)
|
|
{
|
|
_session_alloc.upgrade(ram_quota);
|
|
}
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
~Session_component()
|
|
{
|
|
_ep.dissolve(&_framebuffer_session_component);
|
|
_ep.dissolve(&_input_session_component);
|
|
|
|
destroy_all_views();
|
|
|
|
_release_buffer();
|
|
}
|
|
|
|
void destroy_all_views()
|
|
{
|
|
while (Session_view_list_elem *v = _view_list.first())
|
|
_destroy_view(*static_cast<View *>(v));
|
|
}
|
|
|
|
void upgrade_ram_quota(size_t ram_quota) { _session_alloc.upgrade(ram_quota); }
|
|
|
|
|
|
/**********************************
|
|
** Nitpicker-internal interface **
|
|
**********************************/
|
|
|
|
void submit_input_event(Input::Event e)
|
|
{
|
|
using namespace Input;
|
|
|
|
/*
|
|
* Transpose absolute coordinates by session-specific vertical
|
|
* offset.
|
|
*/
|
|
if (e.ax() || e.ay())
|
|
e = Event(e.type(), e.code(), e.ax(),
|
|
Genode::max(0, e.ay() - v_offset()), e.rx(), e.ry());
|
|
|
|
_input_session_component.submit(&e);
|
|
}
|
|
|
|
void submit_sync() override
|
|
{
|
|
_framebuffer_session_component.submit_sync();
|
|
}
|
|
|
|
|
|
/*********************************
|
|
** Nitpicker session interface **
|
|
*********************************/
|
|
|
|
Framebuffer::Session_capability framebuffer_session() override {
|
|
return _framebuffer_session_cap; }
|
|
|
|
Input::Session_capability input_session() override {
|
|
return _input_session_cap; }
|
|
|
|
View_handle create_view(View_handle parent_handle) override
|
|
{
|
|
View *view = nullptr;
|
|
|
|
/*
|
|
* Create child view
|
|
*/
|
|
if (parent_handle.valid()) {
|
|
|
|
try {
|
|
Locked_ptr<View> parent(_view_handle_registry.lookup(parent_handle));
|
|
if (!parent.is_valid())
|
|
return View_handle();
|
|
|
|
view = new (_view_alloc)
|
|
View(*this,
|
|
stay_top() ? View::STAY_TOP : View::NOT_STAY_TOP,
|
|
View::NOT_TRANSPARENT, View::NOT_BACKGROUND,
|
|
&(*parent));
|
|
|
|
parent->add_child(*view);
|
|
}
|
|
catch (View_handle_registry::Lookup_failed) {
|
|
return View_handle(); }
|
|
catch (Genode::Allocator::Out_of_memory) {
|
|
throw Nitpicker::Session::Out_of_metadata(); }
|
|
}
|
|
|
|
/*
|
|
* Create top-level view
|
|
*/
|
|
else {
|
|
try {
|
|
view = new (_view_alloc)
|
|
View(*this,
|
|
stay_top() ? View::STAY_TOP : View::NOT_STAY_TOP,
|
|
View::NOT_TRANSPARENT, View::NOT_BACKGROUND,
|
|
nullptr);
|
|
}
|
|
catch (Genode::Allocator::Out_of_memory) {
|
|
throw Nitpicker::Session::Out_of_metadata(); }
|
|
}
|
|
|
|
_view_list.insert(view);
|
|
_ep.manage(view);
|
|
|
|
return _view_handle_registry.alloc(*view);
|
|
}
|
|
|
|
void destroy_view(View_handle handle) override
|
|
{
|
|
try {
|
|
Locked_ptr<View> view(_view_handle_registry.lookup(handle));
|
|
if (view.is_valid())
|
|
_destroy_view(*view);
|
|
}
|
|
catch (View_handle_registry::Lookup_failed) { }
|
|
|
|
_view_handle_registry.free(handle);
|
|
}
|
|
|
|
View_handle view_handle(View_capability view_cap, View_handle handle) override
|
|
{
|
|
View *view = dynamic_cast<View *>(_ep.lookup_and_lock(view_cap));
|
|
if (!view) return View_handle();
|
|
|
|
Object_pool<Rpc_object_base>::Guard guard(view);
|
|
|
|
return _view_handle_registry.alloc(*view, handle);
|
|
}
|
|
|
|
View_capability view_capability(View_handle handle) override
|
|
{
|
|
try {
|
|
Locked_ptr<View> view(_view_handle_registry.lookup(handle));
|
|
return view.is_valid() ? view->cap() : View_capability();
|
|
}
|
|
catch (View_handle_registry::Lookup_failed) {
|
|
return View_capability();
|
|
}
|
|
}
|
|
|
|
void release_view_handle(View_handle handle) override
|
|
{
|
|
try {
|
|
_view_handle_registry.free(handle); }
|
|
|
|
catch (View_handle_registry::Lookup_failed) {
|
|
PWRN("view lookup failed while releasing view handle");
|
|
return;
|
|
}
|
|
}
|
|
|
|
Genode::Dataspace_capability command_dataspace() override
|
|
{
|
|
return _command_ds.cap();
|
|
}
|
|
|
|
void execute() override
|
|
{
|
|
for (unsigned i = 0; i < _command_buffer.num(); i++) {
|
|
try {
|
|
_execute_command(_command_buffer.get(i)); }
|
|
catch (View_handle_registry::Lookup_failed) {
|
|
PWRN("view lookup failed during command execution"); }
|
|
}
|
|
}
|
|
|
|
Framebuffer::Mode mode() override
|
|
{
|
|
unsigned const width = _framebuffer.mode().width();
|
|
unsigned const height = _framebuffer.mode().height()
|
|
- ::Session::v_offset();
|
|
|
|
return Framebuffer::Mode(width, height,
|
|
_framebuffer.mode().format());
|
|
}
|
|
|
|
void buffer(Framebuffer::Mode mode, bool use_alpha) override
|
|
{
|
|
/* check if the session quota suffices for the specified mode */
|
|
if (_session_alloc.quota() < ram_quota(mode, use_alpha))
|
|
throw Nitpicker::Session::Out_of_metadata();
|
|
|
|
_framebuffer_session_component.notify_mode_change(mode, use_alpha);
|
|
}
|
|
|
|
void focus(Genode::Capability<Nitpicker::Session> session_cap) override
|
|
{
|
|
/* check permission by comparing session labels */
|
|
if (!_focus_change_permitted()) {
|
|
PWRN("unauthorized focus change requesed by %s", label().string());
|
|
return;
|
|
}
|
|
|
|
/* prevent focus changes during drag operations */
|
|
if (_mode.drag())
|
|
return;
|
|
|
|
/* lookup targeted session object */
|
|
Session_component * const session =
|
|
session_cap.valid() ? dynamic_cast<Session_component *>(_ep.lookup_and_lock(session_cap)) : 0;
|
|
|
|
_mode.focused_session(session);
|
|
|
|
if (session)
|
|
session->release();
|
|
}
|
|
|
|
|
|
/*******************************
|
|
** Buffer_provider interface **
|
|
*******************************/
|
|
|
|
Buffer *realloc_buffer(Framebuffer::Mode mode, bool use_alpha)
|
|
{
|
|
_release_buffer();
|
|
|
|
Area const size(mode.width(), mode.height());
|
|
|
|
typedef Pixel_rgb565 PT;
|
|
|
|
_buffer_size =
|
|
Chunky_dataspace_texture<PT>::calc_num_bytes(size, use_alpha);
|
|
|
|
Chunky_dataspace_texture<PT> * const texture =
|
|
new (&_session_alloc) Chunky_dataspace_texture<PT>(size, use_alpha);
|
|
|
|
if (!_session_alloc.withdraw(_buffer_size)) {
|
|
destroy(&_session_alloc, texture);
|
|
_buffer_size = 0;
|
|
return 0;
|
|
}
|
|
|
|
::Session::texture(texture, use_alpha);
|
|
::Session::input_mask(texture->input_mask_buffer());
|
|
|
|
return texture;
|
|
}
|
|
};
|
|
|
|
|
|
template <typename PT>
|
|
class Nitpicker::Root : public Genode::Root_component<Session_component>
|
|
{
|
|
private:
|
|
|
|
Session_list &_session_list;
|
|
Global_keys &_global_keys;
|
|
Framebuffer::Mode _scr_mode;
|
|
View_stack &_view_stack;
|
|
Mode &_mode;
|
|
Framebuffer::Session &_framebuffer;
|
|
int _default_v_offset;
|
|
|
|
protected:
|
|
|
|
Session_component *_create_session(const char *args)
|
|
{
|
|
PINF("create session with args: %s\n", args);
|
|
size_t const ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
|
|
|
|
int const v_offset = _default_v_offset;
|
|
|
|
bool const stay_top = Arg_string::find_arg(args, "stay_top").bool_value(false);
|
|
|
|
size_t const required_quota = Input::Session_component::ev_ds_size()
|
|
+ Genode::align_addr(sizeof(Session::Command_buffer), 12);
|
|
|
|
if (ram_quota < required_quota) {
|
|
PWRN("Insufficient dontated ram_quota (%zd bytes), require %zd bytes",
|
|
ram_quota, required_quota);
|
|
throw Root::Quota_exceeded();
|
|
}
|
|
|
|
size_t const unused_quota = ram_quota - required_quota;
|
|
|
|
Session_label const label(args);
|
|
bool const provides_default_bg = (strcmp(label.string(), "backdrop") == 0);
|
|
|
|
Session_component *session = new (md_alloc())
|
|
Session_component(Session_label(args), _view_stack, _mode, *ep(),
|
|
_framebuffer, v_offset, provides_default_bg,
|
|
stay_top, *md_alloc(), unused_quota);
|
|
|
|
session->apply_session_color();
|
|
_session_list.insert(session);
|
|
_global_keys.apply_config(_session_list);
|
|
|
|
return session;
|
|
}
|
|
|
|
void _upgrade_session(Session_component *s, const char *args)
|
|
{
|
|
size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
|
|
s->upgrade_ram_quota(ram_quota);
|
|
}
|
|
|
|
void _destroy_session(Session_component *session)
|
|
{
|
|
_session_list.remove(session);
|
|
_global_keys.apply_config(_session_list);
|
|
|
|
session->destroy_all_views();
|
|
_mode.forget(*session);
|
|
|
|
destroy(md_alloc(), session);
|
|
}
|
|
|
|
public:
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
Root(Session_list &session_list, Global_keys &global_keys,
|
|
Rpc_entrypoint &session_ep, View_stack &view_stack,
|
|
Mode &mode, Allocator &md_alloc,
|
|
Framebuffer::Session &framebuffer,
|
|
int default_v_offset)
|
|
:
|
|
Root_component<Session_component>(&session_ep, &md_alloc),
|
|
_session_list(session_list), _global_keys(global_keys),
|
|
_view_stack(view_stack), _mode(mode),
|
|
_framebuffer(framebuffer),
|
|
_default_v_offset(default_v_offset)
|
|
{ }
|
|
};
|
|
|
|
|
|
struct Nitpicker::Main
|
|
{
|
|
Server::Entrypoint &ep;
|
|
|
|
/*
|
|
* Sessions to the required external services
|
|
*/
|
|
Framebuffer::Connection framebuffer;
|
|
Input::Connection input;
|
|
|
|
Input::Event * const ev_buf =
|
|
env()->rm_session()->attach(input.dataspace());
|
|
|
|
typedef Pixel_rgb565 PT; /* physical pixel type */
|
|
|
|
/*
|
|
* Initialize framebuffer and menu bar
|
|
*
|
|
* The framebuffer and menubar are encapsulated in a volatile object to
|
|
* allow their reconstruction at runtime as a response to resolution
|
|
* changes.
|
|
*/
|
|
struct Framebuffer_screen
|
|
{
|
|
Framebuffer::Session &framebuffer;
|
|
|
|
Framebuffer::Mode const mode = framebuffer.mode();
|
|
|
|
Attached_dataspace fb_ds = { framebuffer.dataspace() };
|
|
|
|
Screen<PT> screen = { fb_ds.local_addr<PT>(), Area(mode.width(), mode.height()) };
|
|
|
|
enum { MENUBAR_HEIGHT = 16 };
|
|
|
|
/**
|
|
* Size of menubar pixel buffer in bytes
|
|
*/
|
|
size_t const menubar_size = sizeof(PT)*mode.width()*MENUBAR_HEIGHT;
|
|
|
|
PT *menubar_pixels =
|
|
(PT *)env()->heap()->alloc(menubar_size);
|
|
|
|
Chunky_menubar<PT> menubar =
|
|
{ menubar_pixels, Area(mode.width(), MENUBAR_HEIGHT) };
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
Framebuffer_screen(Framebuffer::Session &fb) : framebuffer(fb) { }
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
~Framebuffer_screen() { env()->heap()->free(menubar_pixels, menubar_size); }
|
|
};
|
|
|
|
Genode::Volatile_object<Framebuffer_screen> fb_screen = { framebuffer };
|
|
|
|
void handle_fb_mode(unsigned);
|
|
|
|
Signal_rpc_member<Main> fb_mode_dispatcher = { ep, *this, &Main::handle_fb_mode };
|
|
|
|
/*
|
|
* User-input policy
|
|
*/
|
|
Global_keys global_keys;
|
|
|
|
Session_list session_list;
|
|
|
|
User_state user_state = { global_keys, fb_screen->screen.size(), fb_screen->menubar };
|
|
|
|
/*
|
|
* Create view stack with default elements
|
|
*/
|
|
Area mouse_size { big_mouse.w, big_mouse.h };
|
|
Mouse_cursor<PT const> mouse_cursor { (PT const *)&big_mouse.pixels[0][0],
|
|
mouse_size, user_state };
|
|
|
|
Background background = { Area(99999, 99999) };
|
|
|
|
/*
|
|
* Initialize Nitpicker root interface
|
|
*/
|
|
Genode::Sliced_heap sliced_heap = { env()->ram_session(), env()->rm_session() };
|
|
|
|
Root<PT> np_root = { session_list, global_keys, ep.rpc_ep(), user_state,
|
|
user_state, sliced_heap, framebuffer,
|
|
Framebuffer_screen::MENUBAR_HEIGHT };
|
|
|
|
Genode::Reporter pointer_reporter = { "pointer" };
|
|
|
|
/*
|
|
* Configuration-update dispatcher, executed in the context of the RPC
|
|
* entrypoint.
|
|
*
|
|
* In addition to installing the signal dispatcher, we trigger first signal
|
|
* manually to turn the initial configuration into effect.
|
|
*/
|
|
void handle_config(unsigned);
|
|
|
|
Signal_rpc_member<Main> config_dispatcher = { ep, *this, &Main::handle_config};
|
|
|
|
/**
|
|
* Signal handler invoked on the reception of user input
|
|
*/
|
|
void handle_input(unsigned);
|
|
|
|
Signal_rpc_member<Main> input_dispatcher = { ep, *this, &Main::handle_input };
|
|
|
|
/*
|
|
* Dispatch input and redraw periodically
|
|
*/
|
|
Timer::Connection timer;
|
|
|
|
Main(Server::Entrypoint &ep) : ep(ep)
|
|
{
|
|
// tmp_fb = &framebuffer;
|
|
|
|
fb_screen->menubar.state(Menubar_state(user_state, "", BLACK));
|
|
|
|
user_state.default_background(background);
|
|
user_state.stack(mouse_cursor);
|
|
user_state.stack(fb_screen->menubar);
|
|
user_state.stack(background);
|
|
|
|
config()->sigh(config_dispatcher);
|
|
Signal_transmitter(config_dispatcher).submit();
|
|
|
|
timer.sigh(input_dispatcher);
|
|
timer.trigger_periodic(10*1000);
|
|
|
|
framebuffer.mode_sigh(fb_mode_dispatcher);
|
|
|
|
env()->parent()->announce(ep.manage(np_root));
|
|
}
|
|
};
|
|
|
|
|
|
void Nitpicker::Main::handle_input(unsigned)
|
|
{
|
|
/*
|
|
* If kill mode is already active, we got recursively called from
|
|
* within this 'input_func' (via 'wait_and_dispatch_one_signal').
|
|
* In this case, return immediately. New input events will be
|
|
* processed in the local 'do' loop.
|
|
*/
|
|
if (user_state.kill())
|
|
return;
|
|
|
|
do {
|
|
Point const old_mouse_pos = user_state.mouse_pos();
|
|
|
|
/* handle batch of pending events */
|
|
if (input.is_pending())
|
|
import_input_events(ev_buf, input.flush(), user_state);
|
|
|
|
Point const new_mouse_pos = user_state.mouse_pos();
|
|
Point const menubar_offset = Point(0, Framebuffer_screen::MENUBAR_HEIGHT);
|
|
Point const report_pos = new_mouse_pos - menubar_offset;
|
|
|
|
/* report mouse-position updates */
|
|
if (pointer_reporter.is_enabled() && old_mouse_pos != new_mouse_pos
|
|
&& new_mouse_pos.y() >= 0)
|
|
|
|
Genode::Reporter::Xml_generator xml(pointer_reporter, [&] ()
|
|
{
|
|
xml.attribute("xpos", report_pos.x());
|
|
xml.attribute("ypos", report_pos.y());
|
|
});
|
|
|
|
/* update mouse cursor */
|
|
if (old_mouse_pos != new_mouse_pos)
|
|
user_state.geometry(mouse_cursor, Rect(new_mouse_pos, mouse_size));
|
|
|
|
/* perform redraw and flush pixels to the framebuffer */
|
|
user_state.draw(fb_screen->screen).flush([&] (Rect const &rect) {
|
|
framebuffer.refresh(rect.x1(), rect.y1(),
|
|
rect.w(), rect.h()); });
|
|
|
|
/* deliver framebuffer synchronization events */
|
|
if (!user_state.kill()) {
|
|
for (::Session *s = session_list.first(); s; s = s->next())
|
|
s->submit_sync();
|
|
}
|
|
|
|
/*
|
|
* In kill mode, we do not leave the dispatch function in order to
|
|
* block RPC calls from Nitpicker clients. We block for signals
|
|
* here to stay responsive to user input and configuration changes.
|
|
* Nested calls of 'input_func' are prevented by the condition
|
|
* check for 'user_state.kill()' at the beginning of the handler.
|
|
*/
|
|
if (user_state.kill())
|
|
Server::wait_and_dispatch_one_signal();
|
|
|
|
} while (user_state.kill());
|
|
}
|
|
|
|
|
|
void Nitpicker::Main::handle_config(unsigned)
|
|
{
|
|
config()->reload();
|
|
|
|
/* update global keys policy */
|
|
global_keys.apply_config(session_list);
|
|
|
|
/* update background color */
|
|
try {
|
|
config()->xml_node().sub_node("background")
|
|
.attribute("color").value(&background.color);
|
|
} catch (...) { }
|
|
|
|
/* enable or disable reporting */
|
|
try {
|
|
pointer_reporter.enabled(config()->xml_node().sub_node("report")
|
|
.attribute("pointer")
|
|
.has_value("yes"));
|
|
} catch (...) { }
|
|
|
|
/* update session policies */
|
|
for (::Session *s = session_list.first(); s; s = s->next())
|
|
s->apply_session_color();
|
|
|
|
/* redraw */
|
|
user_state.update_all_views();
|
|
}
|
|
|
|
|
|
void Nitpicker::Main::handle_fb_mode(unsigned)
|
|
{
|
|
/* save state of menu bar */
|
|
Menubar_state menubar_state = fb_screen->menubar.state();
|
|
|
|
/* remove old version of menu bar from view stack */
|
|
user_state.remove_view(fb_screen->menubar, false);
|
|
|
|
/* reconstruct framebuffer screen and menu bar */
|
|
fb_screen.construct(framebuffer);
|
|
|
|
/* let the view stack use the new size */
|
|
user_state.size(Area(fb_screen->mode.width(), fb_screen->mode.height()));
|
|
|
|
/* load original state into new menu bar */
|
|
fb_screen->menubar.state(menubar_state);
|
|
|
|
/* re-insert menu bar behind mouse cursor */
|
|
user_state.stack(fb_screen->menubar, &mouse_cursor);
|
|
|
|
/* redraw */
|
|
user_state.update_all_views();
|
|
}
|
|
|
|
|
|
/************
|
|
** Server **
|
|
************/
|
|
|
|
namespace Server {
|
|
|
|
char const *name() { return "nitpicker_ep"; }
|
|
|
|
size_t stack_size() { return 4*1024*sizeof(long); }
|
|
|
|
void construct(Entrypoint &ep)
|
|
{
|
|
static Nitpicker::Main nitpicker(ep);
|
|
}
|
|
}
|