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weston/clients/editor.c

382 lines
9.2 KiB

/*
* Copyright © 2012 Openismus GmbH
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/input.h>
#include <cairo.h>
#include "window.h"
#include "text-client-protocol.h"
struct text_entry {
struct widget *widget;
struct window *window;
char *text;
int active;
struct rectangle allocation;
struct text_model *model;
};
struct editor {
struct text_model_factory *text_model_factory;
struct display *display;
struct window *window;
struct widget *widget;
struct text_entry *entry;
struct text_entry *editor;
};
static void
text_entry_append(struct text_entry *entry, const char *text)
{
entry->text = realloc(entry->text, strlen(entry->text) + strlen(text) + 1);
strcat(entry->text, text);
}
static void
text_model_commit_string(void *data,
struct text_model *text_model,
const char *text,
uint32_t index)
{
struct text_entry *entry = data;
text_entry_append(entry, text);
widget_schedule_redraw(entry->widget);
}
static void
text_model_preedit_string(void *data,
struct text_model *text_model,
const char *text,
uint32_t index)
{
}
static void
text_model_preedit_styling(void *data,
struct text_model *text_model)
{
}
static void
text_model_key(void *data,
struct text_model *text_model)
{
}
static void
text_model_selection_replacement(void *data,
struct text_model *text_model)
{
}
static void
text_model_direction(void *data,
struct text_model *text_model)
{
}
static void
text_model_locale(void *data,
struct text_model *text_model)
{
}
static void
text_model_activated(void *data,
struct text_model *text_model)
{
struct text_entry *entry = data;
entry->active = 1;
widget_schedule_redraw(entry->widget);
}
static void
text_model_deactivated(void *data,
struct text_model *text_model)
{
struct text_entry *entry = data;
entry->active = 0;
widget_schedule_redraw(entry->widget);
}
static const struct text_model_listener text_model_listener = {
text_model_commit_string,
text_model_preedit_string,
text_model_preedit_styling,
text_model_key,
text_model_selection_replacement,
text_model_direction,
text_model_locale,
text_model_activated,
text_model_deactivated
};
static struct text_entry*
text_entry_create(struct editor *editor, const char *text)
{
struct text_entry *entry;
struct wl_surface *surface;
entry = malloc(sizeof *entry);
surface = window_get_wl_surface(editor->window);
entry->widget = editor->widget;
entry->window = editor->window;
entry->text = strdup(text);
entry->active = 0;
entry->model = text_model_factory_create_text_model(editor->text_model_factory, surface);
text_model_add_listener(entry->model, &text_model_listener, entry);
return entry;
}
static void
text_entry_destroy(struct text_entry *entry)
{
text_model_destroy(entry->model);
free(entry->text);
free(entry);
}
static void
text_entry_draw(struct text_entry *entry, cairo_t *cr)
{
cairo_save(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_rectangle(cr, entry->allocation.x, entry->allocation.y, entry->allocation.width, entry->allocation.height);
cairo_clip(cr);
cairo_translate(cr, entry->allocation.x, entry->allocation.y);
cairo_rectangle(cr, 0, 0, entry->allocation.width, entry->allocation.height);
cairo_set_source_rgba(cr, 1, 1, 1, 0.5);
cairo_fill(cr);
if (entry->active) {
cairo_rectangle(cr, 0, 0, entry->allocation.width, entry->allocation.height);
cairo_set_source_rgba(cr, 0, 0, 1, 0.5);
cairo_stroke(cr);
}
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_select_font_face(cr, "sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_BOLD);
cairo_set_font_size(cr, 14);
cairo_translate(cr, 10, entry->allocation.height / 2);
cairo_show_text(cr, entry->text);
cairo_restore(cr);
}
static void
redraw_handler(struct widget *widget, void *data)
{
struct editor *editor = data;
cairo_surface_t *surface;
struct rectangle allocation;
cairo_t *cr;
surface = window_get_surface(editor->window);
widget_get_allocation(editor->widget, &allocation);
cr = cairo_create(surface);
cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
cairo_clip(cr);
cairo_translate(cr, allocation.x, allocation.y);
/* Draw background */
cairo_push_group(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
cairo_fill(cr);
/* Entry */
text_entry_draw(editor->entry, cr);
/* Editor */
text_entry_draw(editor->editor, cr);
cairo_pop_group_to_source(cr);
cairo_paint(cr);
cairo_destroy(cr);
cairo_surface_destroy(surface);
}
static void
text_entry_allocate(struct text_entry *entry, int32_t x, int32_t y,
int32_t width, int32_t height)
{
entry->allocation.x = x;
entry->allocation.y = y;
entry->allocation.width = width;
entry->allocation.height = height;
}
static void
resize_handler(struct widget *widget,
int32_t width, int32_t height, void *data)
{
struct editor *editor = data;
text_entry_allocate(editor->entry, 20, 20, width - 40, height / 2 - 40);
text_entry_allocate(editor->editor, 20, height / 2 + 20, width - 40, height / 2 - 40);
}
static int32_t
rectangle_contains(struct rectangle *rectangle, int32_t x, int32_t y)
{
if (x < rectangle->x || x > rectangle->x + rectangle->width) {
return 0;
}
if (y < rectangle->y || y > rectangle->y + rectangle->height) {
return 0;
}
return 1;
}
static void
text_entry_activate(struct text_entry *entry,
struct wl_seat *seat)
{
struct wl_surface *surface = window_get_wl_surface(entry->window);
text_model_activate(entry->model,
seat,
surface);
}
static void
text_entry_deactivate(struct text_entry *entry,
struct wl_seat *seat)
{
text_model_deactivate(entry->model,
seat);
}
static void
button_handler(struct widget *widget,
struct input *input, uint32_t time,
uint32_t button,
enum wl_pointer_button_state state, void *data)
{
struct editor *editor = data;
struct rectangle allocation;
int32_t x, y;
struct wl_seat *seat;
if (state != WL_POINTER_BUTTON_STATE_PRESSED || button != BTN_LEFT) {
return;
}
input_get_position(input, &x, &y);
widget_get_allocation(editor->widget, &allocation);
x -= allocation.x;
y -= allocation.y;
int32_t activate_entry = rectangle_contains(&editor->entry->allocation, x, y);
int32_t activate_editor = rectangle_contains(&editor->editor->allocation, x, y);
assert(!(activate_entry && activate_editor));
seat = input_get_seat(input);
if (activate_entry) {
text_entry_activate(editor->entry, seat);
} else if (activate_editor) {
text_entry_activate(editor->editor, seat);
} else {
text_entry_deactivate(editor->entry, seat);
text_entry_deactivate(editor->editor, seat);
}
widget_schedule_redraw(widget);
}
static void
global_handler(struct wl_display *display, uint32_t id,
const char *interface, uint32_t version, void *data)
{
struct editor *editor = data;
if (!strcmp(interface, "text_model_factory")) {
editor->text_model_factory = wl_display_bind(display, id,
&text_model_factory_interface);
} else if (!strcmp(interface, "wl_seat")) {
fprintf(stderr, "wl_seat added\n");
}
}
int
main(int argc, char *argv[])
{
struct editor editor;
editor.display = display_create(argc, argv);
if (editor.display == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
wl_display_add_global_listener(display_get_display(editor.display),
global_handler, &editor);
editor.window = window_create(editor.display);
editor.widget = frame_create(editor.window, &editor);
editor.entry = text_entry_create(&editor, "Entry");
editor.editor = text_entry_create(&editor, "Editor");
window_set_title(editor.window, "Text Editor");
widget_set_redraw_handler(editor.widget, redraw_handler);
widget_set_resize_handler(editor.widget, resize_handler);
widget_set_button_handler(editor.widget, button_handler);
window_schedule_resize(editor.window, 500, 400);
display_run(editor.display);
text_entry_destroy(editor.entry);
text_entry_destroy(editor.editor);
return 0;
}