ui/gtk/toolkit.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2017 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

#include "toolkit.h"
#include "toolbar.h"
#include "window.h"
#include "icon.h"
#include "../common/document.h"
#include "../common/properties.h"
#include "../common/menu.h"
#include "../common/toolbar.h"
#include "../common/threadpool.h"
#include "../common/app.h"

#include <cx/string.h>
#include <cx/printf.h>

#include <pthread.h>

#ifdef UI_APPLICATION
UI_APPLICATION app;
#endif

static const char *application_name;

static ui_callback   appclose_fnc;
static void          *appclose_udata;

static UiObject      *active_window;

static int scale_factor = 1;

static UiBool        exit_on_shutdown;

UIEXPORT void ui_init(const char *appname, int argc, char **argv) {
    application_name = appname;
    uic_init_global_context();
    
#if GTK_MAJOR_VERSION >= 4
    gtk_init();
#else
    gtk_init(&argc, &argv);
#endif
    
    ui_css_init();
    uic_menu_init();
    uic_toolbar_init();
    ui_image_init();
    uic_load_app_properties();
    uic_init_threads();
    
#if GTK_MAJOR_VERSION >= 4
    scale_factor = 1; // TODO
#elif defined(UI_SUPPORTS_SCALE)
    scale_factor = gdk_monitor_get_scale_factor(
            gdk_display_get_primary_monitor(gdk_display_get_default()));
#endif
}

const char* ui_appname() {
    return application_name;
}

void ui_app_exit_on_shutdown(UiBool exitapp) {
    exit_on_shutdown = exitapp;
}

#ifdef UI_APPLICATION
static void app_startup(GtkApplication* app, gpointer userdata) {
    uic_application_startup(NULL);
}

static void app_activate(GtkApplication* app, gpointer userdata) {
    //printf("activate\n");
}

static void app_shutdown(GtkApplication *app, gpointer userdata) {
    uic_application_exit(NULL);
    ui_app_save_settings();
}

#endif

void ui_main() {
#ifdef UI_APPLICATION
    cxmutstr appid = cx_asprintf(
            "ui.%s",
            application_name ? application_name : "application1");
    app = UI_APPLICATION_NEW(appid.ptr);
    g_signal_connect (app, "startup", G_CALLBACK (app_startup), NULL);
    g_signal_connect (app, "shutdown", G_CALLBACK (app_shutdown), NULL);
    g_signal_connect (app, "activate", G_CALLBACK (app_activate), NULL);
    g_application_run(G_APPLICATION (app), 0, NULL);
    g_object_unref (app);
    
    free(appid.ptr);
#else
    uic_application_startup(NULL);
    gtk_main();
    uic_application_exit(NULL);
    ui_app_save_settings();
#endif
    if(exit_on_shutdown) {
        exit(0);
    }
}


void ui_app_ref(void) {
#ifdef UI_APPLICATION
    g_application_hold(G_APPLICATION(&app));
#else
    // TODO
#endif
}

void ui_app_unref(void) {
#ifdef UI_APPLICATION
    g_application_release(G_APPLICATION(&app));
#else
    // TODO
#endif
}


#ifndef UI_GTK2
void ui_app_quit() {
    g_application_quit(G_APPLICATION(app)); // TODO: fix, does not work
}

GtkApplication* ui_get_application() {
    return GTK_APPLICATION(app);
}
#endif

void ui_show(UiObject *obj) {
    gboolean visible = FALSE;
    uic_check_state_widgets(obj->ctx);
    if(obj->widget) {
        visible = gtk_widget_is_visible(obj->widget);
#if GTK_MAJOR_VERSION >= 4
        gtk_window_present(GTK_WINDOW(obj->widget));
#elif GTK_MAJOR_VERSION <= 3
        gtk_widget_show_all(obj->widget);
#endif
    }
      
    if(!visible) {
        obj->ref++;
    }
}

void ui_close(UiObject *obj) {
    uic_context_prepare_close(obj->ctx); // TODO: should this be moved to the close event handler?
    if(obj->widget) {
#if GTK_CHECK_VERSION(4, 0, 0)
        gtk_window_close(GTK_WINDOW(obj->widget));
#else
        gtk_widget_destroy(obj->widget);
#endif
    } else {
        ui_window_close_request(obj);
        ui_app_unref();
    }
}


static gboolean ui_job_finished(void *data) {
    UiJob *job = data;
    
    UiEvent event;
    event.obj = job->obj;
    event.window = job->obj->window;
    event.document = job->obj->ctx->document;
    event.intval = 0;
    event.eventdata = NULL;
    event.eventdatatype = 0;

    job->finish_callback(&event, job->finish_data);
    free(job);
    return FALSE;
}

static void* ui_jobthread(void *data) {
    UiJob *job = data;
    int result = job->job_func(job->job_data);
    if(!result && job->finish_callback) {
        g_idle_add(ui_job_finished, job);
    } else {
        free(job);
    }
    return NULL;
}

static gboolean ui_idle_func(void *data) {
    UiJob *job = data;
    job->job_func(job->job_data);
    free(job);
    return FALSE;
}

void ui_call_mainthread(ui_threadfunc tf, void* td) {
    if(uic_mainthread_calls_is_buffered()) {
        uic_add_buffered_mainthread_call(tf, td);
        return;
    }
    
    UiJob *job = malloc(sizeof(UiJob));
    job->job_func = tf;
    job->job_data = td;
    job->finish_callback = NULL;
    job->finish_data = NULL;
    job->obj = NULL;
    g_idle_add(ui_idle_func, job);
}

void ui_job(UiObject *obj, ui_threadfunc tf, void *td, ui_callback f, void *fd) {
    UiJob *job = malloc(sizeof(UiJob));
    job->obj = obj;
    job->job_func = tf;
    job->job_data = td;
    job->finish_callback = f;
    job->finish_data = fd;
    pthread_t pid;
    pthread_create(&pid, NULL, ui_jobthread, job);
}

void ui_set_enabled(UIWIDGET widget, int enabled) {
    gtk_widget_set_sensitive(widget, enabled);
}

void ui_set_show_all(UIWIDGET widget, int value) {
    // TODO: gtk4
#if GTK_MAJOR_VERSION <= 3
    gtk_widget_set_no_show_all(widget, !value);
#endif
}

void ui_set_visible(UIWIDGET widget, UiBool visible) {
#if GTK_MAJOR_VERSION >= 4
    gtk_widget_set_visible(widget, visible);
#else
    if(visible) {
        gtk_widget_set_no_show_all(widget, FALSE);
        gtk_widget_show_all(widget);
    } else {
        gtk_widget_set_no_show_all(widget, TRUE);
        gtk_widget_hide(widget);
    }
#endif
}

void ui_clipboard_set(char *str) {
#if GTK_MAJOR_VERSION >= 4
    // TODO: gtk4: needs widget
#else
    GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
    gtk_clipboard_set_text(cb, str, strlen(str));
#endif
}

char* ui_clipboard_get() {
#if GTK_MAJOR_VERSION >= 4
    // TODO: gtk4: needs widget
    return NULL;
#else
    GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
    char *str = gtk_clipboard_wait_for_text(cb);
    if(str) {
        char *copy = strdup(str);
        g_free(str);
        return copy;
    } else {
        return NULL;
    }
#endif
}

int ui_get_scalefactor() {
    return scale_factor;
}

void ui_destroy_userdata(GtkWidget *object, void *userdata) {
    free(userdata);
}

void ui_destroy_vardata(GtkWidget *unused, UiVarEventData *data) {
    if(data->var) {
        ui_destroy_boundvar(data->obj->ctx, data->var);
    }
    free(data);
}

void ui_destroy_widget_var(GtkWidget *object, UiVar *var) {
    ui_destroy_boundvar(NULL, var);
}

// TODO: move to common
void ui_destroy_boundvar(UiContext *ctx, UiVar *var) {
    uic_save_var(var);
    uic_unbind_var(var);
    
    // UI_VAR_SPECIAL: anonymous value variable, that is not registered
    //                 in ctx->vars
    if(var->type == UI_VAR_SPECIAL) {
        ui_free(var->from_ctx, var);
    }
}

void ui_set_active_window(UiObject *obj) {
    active_window = obj;
}

UiObject *ui_get_active_window() {
    return active_window;
}


#if GTK_MAJOR_VERSION >= 3

#if GTK_MAJOR_VERSION == 4
static const char *ui_gtk_css = 
".ui-entry-box {\n"
"  background-color: alpha(currentColor, 0.1);"
"  border-radius: 6px;"
"  padding: 7px;"
"}\n"
"#path-textfield-box {\n"
"  background-color: alpha(currentColor, 0.1);"
"  border-radius: 6px;"
"  padding: 0px;"
"}\n"
".pathbar-extra-button {\n"
"  border-top-right-radius: 6px;"
"  border-bottom-right-radius: 6px;"
"  border-top-left-radius: 0px;"
"  border-bottom-left-radius: 0px;"
"}\n"
"#pathbar button {\n"
"  margin: 3px;"
"  border-radius: 4px;"
"  padding-top: 0px;"
"  padding-bottom: 0px;"
"  padding-left: 8px;"
"  padding-right: 8px;"
"}\n"
"#path-textfield-box entry {\n"
"  background-color: #00000000;"
"  border-top-left-radius: 6px;"
"  border-bottom-left-radius: 6px;"
"  border-top-right-radius: 0px;"
"  border-bottom-right-radius: 0px;"
"}\n"
".pathbar-button-inactive {\n"
"  color: alpha(currentColor, 0.5);"
"}\n"
".ui_test {\n"
"  background-color: red;\n"
"}\n"
".ui_label_title {\n"
"  font-weight: bold;\n"
"}\n"
".ui-listbox-header {\n"
"  font-weight: bold;\n"
"  margin-left: 10px;\n"
"  margin-top: 12px;\n"
"  margin-bottom: 10px;\n"
"}\n"
".ui-listbox-header-first {\n"
"  font-weight: bold;\n"
"  margin-left: 10px;\n"
"  margin-top: 4px;\n"
"  margin-bottom: 10px;\n"
"}\n"
".ui-listbox-header-row {\n"
"  font-weight: bold;\n"
"}\n"
".ui-badge {\n"
"  background-color: #e53935;\n"
"  color: white;\n"
"  border-radius: 9999px;\n"
"  padding: 0px 10px 0px 10px;\n"
"  font-weight: bold;\n"
"  margin-left: 4px;"
"  margin-right: 4px;"
"}\n"
".ui-nopadding {"
"  padding: 0;"
"}\n"
".ui-table-entry {"
"  border: none;"
"  box-shadow: none;"
"  background: transparent;"
"}\n"
;

#elif GTK_MAJOR_VERSION == 3
static const char *ui_gtk_css = 
"#path-textfield-box {\n"
"  background-color: @theme_base_color;\n"
"  border-radius: 5px;\n"
"  padding: 0px;\n"
"}\n"
".pathbar-button-inactive {\n"
"  color: alpha(currentColor, 0.5);"
"}\n"
".ui_test {\n"
"  background-color: red;\n"
"}\n"
".ui_label_title {\n"
"  font-weight: bold;\n"
"}\n"
"placessidebar row {\n"
"  padding-left: 10px;\n"
"}\n"
".ui-listbox-header {\n"
"  font-weight: bold;\n"
"  margin-left: 10px;\n"
"  margin-top: 12px;\n"
"  margin-bottom: 10px;\n"
"}\n"
".ui-listbox-header-first {\n"
"  font-weight: bold;\n"
"  margin-left: 10px;\n"
"  margin-top: 4px;\n"
"  margin-bottom: 10px;\n"
"}\n"
".ui-listbox-header-row {\n"
"  font-weight: bold;\n"
"}\n"
".ui-badge {\n"
"  background-color: #e53935;\n"
"  color: white;\n"
"  border-radius: 9999px;\n"
"  padding: 0px 10px 0px 10px;\n"
"  font-weight: bold;\n"
"  margin-left: 4px;"
"  margin-right: 4px;"
"}\n"
".ui-nopadding {"
"  padding: 0;"
"}\n"
;
#endif

void ui_css_init(void) {
    ui_add_styledata(ui_gtk_css, -1);
}

void ui_add_styledata(const char *styledata, int len) {
    GtkCssProvider *css = gtk_css_provider_new();
    
#ifdef UI_GTK3
    gtk_css_provider_load_from_data(css, styledata, len, NULL);
    
    GdkScreen *screen = gdk_screen_get_default();
    gtk_style_context_add_provider_for_screen(
            screen,
            GTK_STYLE_PROVIDER(css),
            GTK_STYLE_PROVIDER_PRIORITY_USER);
#endif /* UI_GTK3 */
    
#ifdef UI_GTK4
    
    
#if GTK_MINOR_VERSION < 12
    gtk_css_provider_load_from_data(css, styledata, len);
#else
    if(len < 0) {
        gtk_css_provider_load_from_string(css, ui_gtk_css);
    } else {
        GBytes *style_data = g_bytes_new(styledata, len);
        gtk_css_provider_load_from_bytes(css, style_data);
        g_bytes_unref(style_data);
        
    }
#endif /* GTK_MINOR_VERSION < 12 */
    
    GdkDisplay *display = gdk_display_get_default();
    gtk_style_context_add_provider_for_display(display, GTK_STYLE_PROVIDER(css), GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
    
#endif /* UI_GTK4 */
}


#endif

void ui_set_name_and_style(GtkWidget *widget, const char *name, const char *style_classes) {
    if(name) {
        gtk_widget_set_name(widget, name);
    }
    if(style_classes) {
        cxstring *cls = NULL;
        size_t numClasses = cx_strsplit_a(cxDefaultAllocator, cx_str(style_classes), cx_str(" "), 128, &cls);
        for(int i=0;i<numClasses;i++) {
            cxmutstr m = cx_strdup(cls[i]);
#if GTK_MAJOR_VERSION >= 4
            gtk_widget_add_css_class(widget, m.ptr);
#elif GTK_MAJOR_VERSION >= 3
            GtkStyleContext *ctx = gtk_widget_get_style_context(widget);
            gtk_style_context_add_class(ctx, m.ptr);
#endif
            free(m.ptr);
        }
        free(cls);
        
    }
}

void ui_set_widget_states(UiContext *ctx, GtkWidget *widget, const int *states) {
    if(!states) {
        return;
    }
    size_t nstates = uic_state_array_size(states);
    ui_set_widget_nstates(ctx, widget, states, nstates);
}

void ui_set_widget_nstates(UiContext *ctx, GtkWidget *widget, const int *states, size_t nstates) {
    if(nstates > 0) {
        uic_add_state_widget_i(ctx, widget, (ui_enablefunc)ui_set_enabled, states, nstates);
        ui_set_enabled(widget, FALSE);
    }
}

void ui_set_widget_visibility_states(UiContext *ctx, GtkWidget *widget, const int *states) {
    if(!states) {
        return;
    }
    size_t nstates = uic_state_array_size(states);
    ui_set_widget_nvisibility_states(ctx, widget, states, nstates);
}


void ui_set_widget_nvisibility_states(UiContext *ctx, GtkWidget *widget, const int *states, size_t ngroups) {
    if(ngroups > 0) {
        uic_add_state_widget_i(ctx, widget, (ui_enablefunc)ui_set_visible, states, ngroups);
        ui_set_visible(widget, FALSE);
    }
}