NotebookWindow.hh

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#pragma once
 
#include <gtkmm/window.h>
#include <gtkmm/applicationwindow.h>
#include <gtkmm/box.h>
#include <gtkmm/progressbar.h>
#include <gtkmm/spinner.h>
#include <gtkmm/label.h>
// #include <gtkmm/stock.h>
#include <gtkmm/button.h>
#include <gtkmm/builder.h>
#include <gtkmm/cssprovider.h>
// #include <gtkmm/toolbar.h>
#include <glibmm/dispatcher.h>
#include <giomm/settings.h>
#include <giomm/actiongroup.h>
 
#include <thread>
#include <mutex>
 
#include "nlohmann/json.hpp"
 
#include "DocumentThread.hh"
#include "ComputeThread.hh"
#include "Console.hh"
#include "GUIBase.hh"
#include "NotebookCanvas.hh"
#include "../common/TeXEngine.hh"
#include "DiffViewer.hh"
 
class Cadabra;
 
namespace cadabra {
 
 
    class NotebookWindow : public Gtk::ApplicationWindow, public DocumentThread, public GUIBase {
        public:
            NotebookWindow(Cadabra *, bool read_only=false, std::string geometry="", std::string title="");
            ~NotebookWindow();
 
            // Virtual functions from GUIBase.
 
            virtual void   add_cell(const DTree&, DTree::iterator, bool) override;
            virtual void   remove_cell(const DTree&, DTree::iterator) override;
            virtual void   remove_all_cells() override;
            virtual void   update_cell(const DTree&, DTree::iterator) override;
            virtual void   position_cursor(const DTree&, DTree::iterator, int pos) override;
            virtual size_t get_cursor_position(const DTree&, DTree::iterator) override;
            virtual void   hide_visual_cells(DTree::iterator it) override;
            virtual void   dim_output_cells(DTree::iterator it) override;
 
            void           select_range(const DTree&, DTree::iterator, int start, int len);
 
            // Implementations of the functions which the compute thread will
            // call directly. If these need to modify the GUI, they need to do
            // so by calling one of the dispatchers.
            virtual void on_connect() override;
            virtual void on_disconnect(const std::string&) override;
            virtual void on_network_error() override;
            virtual void on_kernel_runstatus(bool) override;
            virtual void process_data() override;
 
            // TeX stuff
            TeXEngine        engine;
            double           scale; // total scale factor (hdpi and textscale)
            double           display_scale; // hdpi scale only
 
            // General setup.
            void on_realize() override;
            
            // Handler for vertical scrollbar changes. This gets connected to
            // all the `NotebookCanvas::scroll_event` signals.
            bool on_scroll_changed();
 
            // Handler for SliderView change events.
            void on_slider_changed(std::string variable, double value);
            
            // When something inside the large notebook canvas changes, we need
            // to make sure that the current cell stays into view (if we are
            // editing that cell). We can only do that once all size info is
            // known, which is when the scrolledwindow gets its size_allocate
            // signal. Here's the handler for it.
            void on_scroll_size_allocate(Gtk::Allocation&);
 
            // Ensure that the current cell is visible. This will assume
            // that all size allocations of widgets inside the scrolled window
            // have been made; it only does scrolling, based on the current
            // allocations. Calls `scroll_cell_into_view`.
            void scroll_current_cell_into_view();
 
            // Ensure that the indicated cell is visible.
            void scroll_cell_into_view(DTree::iterator cell);
 
            void set_name(const std::string&);
            void set_title_prefix(const std::string&);
 
            void refresh_highlighting();
            void on_help_register();
 
            void set_statusbar_message(const std::string& message = "", int line = -1, int col = -1);
 
            void select_git_path();
            void compare_to_file();
            void compare_git_latest();
            void compare_git_choose();
            void compare_git_specific();
            void compare_git(const std::string& commit_hash);
            std::string run_git_command(const std::string& args);
 
            virtual void load_from_string(const std::string& notebook_contents) override;
            virtual void set_compute_thread(ComputeThread* compute) override;
 
            virtual void on_interactive_output(const nlohmann::json& msg) override;
            virtual void set_progress(const std::string& msg, int cur_step, int total_steps) override;
        protected:
            virtual bool on_key_press_event(GdkEventKey*) override;
            virtual bool on_delete_event(GdkEventAny*) override;
            virtual bool on_configure_event(GdkEventConfigure *cfg) override;
            virtual bool on_unhandled_error(const std::exception& err) override;
 
            bool handle_outbox_select(GdkEventButton *, DTree::iterator it);
            DTree::iterator selected_cell;
            void unselect_output_cell();
            void on_outbox_copy(Glib::RefPtr<Gtk::Clipboard> refClipboard, DTree::iterator it);
 
        private:
            Glib::RefPtr<Cadabra> cdbapp;
 
            std::vector<Glib::RefPtr<Gio::SimpleAction>> default_actions;
 
            // Main handler which fires whenever the Client object signals
            // that the document is changing or the network status is modified.
            // Runs on the GUI thread.
 
            Glib::Dispatcher dispatcher;
 
            // GUI elements.
 
            Glib::RefPtr<Gio::SimpleActionGroup> actiongroup;
            Glib::RefPtr<Gtk::Builder>           uimanager;
 
            Gtk::Box                       topbox;
            Gtk::Box                       toolbar;
            Gtk::Button                    tool_open, tool_save, tool_save_as;
            Gtk::Button                    tool_run, tool_run_to, tool_stop, tool_restart, tool_restart_and_run_all;        
            Gtk::Box                       supermainbox;
            Gtk::Paned                     dragbox;
            Gtk::Box                       mainbox;
            Gtk::SearchBar                 searchbar;
            Gtk::Box                       search_hbox;
            Gtk::SearchEntry               searchentry;
            Gtk::CheckButton               search_case_insensitive;
            Gtk::Label                     search_result;
            Gtk::Box                       statusbarbox;
 
            Console console;
            Gtk::Dialog console_win;
 
            std::unique_ptr<DiffViewer> diffviewer;
 
            // All canvasses which are stored in the ...
            // These pointers are managed by gtkmm.
            std::vector<NotebookCanvas *>  canvasses;
            int                            current_canvas;
 
            // Buttons
            //         Gtk::Button                    b_kill, b_run, b_run_to, b_run_from, b_help, b_stop, b_undo, b_redo;
 
            // Status bar
            Gtk::ProgressBar               progressbar;
            Gtk::Spinner                   kernel_spinner;
            bool                           kernel_spinner_status;
            Gtk::Label                     status_label, kernel_label, top_label;
 
            // GUI data which is the autoritative source for things displayed in
            // the status bars declared above. These strings are filled on the
            // compute thread and then updated into the gui on the gui thread.
 
            std::mutex                     status_mutex;
            std::string                    status_string, kernel_string, progress_string;
            double                         progress_frac;
            int                            status_line, status_col;
 
            // Functions which get called on the compute thread can signal to
            // the GUI thread that elements need to be updated, by sending
            // signals using the following dispatchers.
            Glib::Dispatcher               dispatch_update_status, dispatch_refresh, dispatch_tex_error;
 
            // Update the status line and progress bar. This should only
            // be called on the GUI thread, so typically gets called
            // indirectly by calling `dispatch_update_status.emmit()`
            // from the compute thread, which calls this function.
            void                           update_status();
 
            // Run the TeX engine on a separate thread, then call
            // `dispatch_refresh` to update the display.
            void tex_run_async();
 
            // Name and modification data.
            void             update_title();
            void             set_stop_sensitive(bool);
            std::string      name, title_prefix, geometry_string;
            bool             modified, read_only;
 
            // Menu and button callbacks.
            void on_file_new();
            void on_file_open();
            void on_file_close();
            void on_file_save();
            void on_file_save_as();
            void on_file_save_as_jupyter();
            void on_file_export_html();
            void on_file_export_html_segment();
            void on_file_export_latex();
            void on_file_export_python();
            void on_file_quit();
            bool quit_safeguard(bool quit);
            bool on_first_redraw();
 
            void on_edit_undo(const Glib::VariantBase&);
            void on_edit_redo(const Glib::VariantBase&);
            void on_edit_copy(const Glib::VariantBase&);
            void on_edit_paste();
            void on_edit_insert_above();
            void on_edit_insert_below();
            void on_edit_delete();
            void on_edit_split();
            void on_edit_cell_is_latex();
            void on_edit_cell_is_python();
            void on_ignore_cell_on_import();
            void on_edit_find();
 
            void on_view_split();
            void on_view_close(const Glib::VariantBase&);
 
            void on_run_cell();
            void on_run_runtocursor();
            void on_run_stop();
 
            void on_prefs_set_cv(int vis);
            void on_prefs_auto_close_latex(const Glib::VariantBase& vb);
            void on_prefs_hide_input_cells(const Glib::VariantBase& vb);            
            void on_prefs_font_size(int num);
            void on_prefs_highlight_syntax(bool on);
            void on_prefs_microtex(bool on);
            void on_prefs_choose_colours();
            void on_prefs_use_defaults();
 
            void on_tools_options();
            void on_tools_clear_cache();
 
            void on_help_about();
            void on_help() const;
 
            void on_kernel_restart();
            void on_kernel_restart_and_run_all();           
 
            void on_search_text_changed();
 
            void on_clipboard_get(Gtk::SelectionData&, guint info);
            void on_clipboard_clear();
            std::string clipboard_txt, clipboard_cdb;
 
            // FIXME: move to DocumentThread
            std::string save(const std::string& fn) const;
 
            void process_todo_queue();
 
            void refresh_after_tex_engine_run();
 
            void handle_thread_tex_error();
 
            void on_crash_window_closed(int);
            bool crash_window_hidden;
 
            // The following are handlers that get called when the cell
            // gets focus, the content of a cell is changed, the user
            // requests to run it (shift-enter). The last two parameters are
            // always the cell in the DTree and the canvas number.
 
            bool cell_got_focus(DTree::iterator, int);
            bool cell_toggle_visibility(DTree::iterator it, int);
            bool cell_content_insert(const std::string&, int, DTree::iterator, int);
            bool cell_content_erase(int, int, DTree::iterator, int);
            bool cell_content_execute(DTree::iterator, bool shift_enter_pressed);
            bool cell_content_changed(DTree::iterator it, int i);
            bool cell_complete_request(DTree::iterator it, int pos, int i);
 
            void interactive_execute();
 
            void resize_codeinput_texview_all(int width);
            void resize_codeinput_texview(DTree::iterator, int width);          
 
            // Handler for callbacks from TeXView cells.
 
            bool on_tex_error(const std::string&, DTree::iterator);
            bool on_copy_as_latex(const DTree::iterator it);
    
            void propagate_global_hide_flag();
            
            // Styling through CSS
            void                           load_css();
            Glib::RefPtr<Gtk::CssProvider> css_provider;
            Glib::RefPtr<Gio::Settings>    settings;
            void on_text_scaling_factor_changed(const std::string& key);
 
            int             last_configure_width;
 
            // Mutex to protect the variables below.
            std::recursive_mutex         tex_need_width_mutex;
            std::unique_ptr<std::thread> tex_thread;
            bool                         tex_running;
            int                          tex_need_width;
            std::string                  tex_error_string;
 
            std::pair<DTree::iterator, size_t> last_find_location;
            std::string                        last_find_string;
 
            bool  is_configured;         // have received and handled a configure event
            bool  run_all_after_restart; // queue notebook running when kernel comes back
 
            // We keep references to a few menu actions so we can
            // enable/disable them at runtime.
            Glib::RefPtr<Gio::SimpleAction> action_copy, action_undo, action_redo,
                action_paste, action_view_close, action_fontsize, action_highlight,
                action_auto_close_latex, action_hide_input_cells,
                action_stop, action_register, action_console, action_microtex;
 
            // Transition animations.
#if GTKMM_MINOR_VERSION>=10
            std::vector<Gtk::Revealer *> to_reveal;
#endif
            bool idle_handler();
        };
 
    };