532 lines
15 KiB
C
532 lines
15 KiB
C
/*
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* Copyright © 2012 Openismus GmbH
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* Copyright © 2012 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of the copyright holders not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The copyright holders make
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <linux/input.h>
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#include <cairo.h>
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#include "window.h"
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#include "input-method-client-protocol.h"
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#include "desktop-shell-client-protocol.h"
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struct virtual_keyboard {
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struct input_panel *input_panel;
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struct input_method *input_method;
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struct input_method_context *context;
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struct display *display;
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char *preedit_string;
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struct {
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xkb_mod_mask_t shift_mask;
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} keysym;
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};
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enum key_type {
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keytype_default,
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keytype_backspace,
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keytype_enter,
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keytype_space,
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keytype_switch,
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keytype_symbols,
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keytype_tab,
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keytype_arrow_up,
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keytype_arrow_left,
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keytype_arrow_right,
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keytype_arrow_down
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};
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struct key {
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enum key_type key_type;
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char *label;
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char *alt;
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unsigned int width;
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};
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static const struct key keys[] = {
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{ keytype_default, "q", "Q", 1},
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{ keytype_default, "w", "W", 1},
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{ keytype_default, "e", "E", 1},
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{ keytype_default, "r", "R", 1},
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{ keytype_default, "t", "T", 1},
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{ keytype_default, "y", "Y", 1},
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{ keytype_default, "u", "U", 1},
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{ keytype_default, "i", "I", 1},
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{ keytype_default, "o", "O", 1},
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{ keytype_default, "p", "P", 1},
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{ keytype_backspace, "<--", "<--", 2},
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{ keytype_tab, "->|", "->|", 1},
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{ keytype_default, "a", "A", 1},
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{ keytype_default, "s", "S", 1},
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{ keytype_default, "d", "D", 1},
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{ keytype_default, "f", "F", 1},
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{ keytype_default, "g", "G", 1},
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{ keytype_default, "h", "H", 1},
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{ keytype_default, "j", "J", 1},
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{ keytype_default, "k", "K", 1},
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{ keytype_default, "l", "L", 1},
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{ keytype_enter, "Enter", "Enter", 2},
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{ keytype_switch, "ABC", "abc", 2},
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{ keytype_default, "z", "Z", 1},
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{ keytype_default, "x", "X", 1},
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{ keytype_default, "c", "C", 1},
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{ keytype_default, "v", "V", 1},
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{ keytype_default, "b", "B", 1},
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{ keytype_default, "n", "N", 1},
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{ keytype_default, "m", "M", 1},
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{ keytype_default, ",", ",", 1},
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{ keytype_default, ".", ".", 1},
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{ keytype_switch, "ABC", "abc", 1},
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{ keytype_symbols, "?123", "?123", 1},
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{ keytype_space, "", "", 6},
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{ keytype_arrow_up, "/\\", "/\\", 1},
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{ keytype_arrow_left, "<", "<", 1},
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{ keytype_arrow_right, ">", ">", 1},
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{ keytype_arrow_down, "\\/", "\\/", 1},
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{ keytype_symbols, "?123", "?123", 1}
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};
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static const unsigned int columns = 12;
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static const unsigned int rows = 4;
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static const double key_width = 60;
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static const double key_height = 50;
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enum keyboard_state {
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keyboardstate_default,
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keyboardstate_uppercase
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};
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struct keyboard {
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struct virtual_keyboard *keyboard;
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struct window *window;
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struct widget *widget;
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enum keyboard_state state;
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};
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static void
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draw_key(const struct key *key,
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cairo_t *cr,
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enum keyboard_state state,
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unsigned int row,
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unsigned int col)
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{
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const char *label;
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cairo_text_extents_t extents;
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cairo_save(cr);
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cairo_rectangle(cr,
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col * key_width, row * key_height,
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key->width * key_width, key_height);
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cairo_clip(cr);
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/* Paint frame */
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cairo_rectangle(cr,
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col * key_width, row * key_height,
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key->width * key_width, key_height);
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cairo_set_line_width(cr, 3);
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cairo_stroke(cr);
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/* Paint text */
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label = state == keyboardstate_default ? key->label : key->alt;
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cairo_text_extents(cr, label, &extents);
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cairo_translate(cr,
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col * key_width,
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row * key_height);
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cairo_translate(cr,
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(key->width * key_width - extents.width) / 2,
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(key_height - extents.y_bearing) / 2);
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cairo_show_text(cr, label);
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cairo_restore(cr);
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}
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static void
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redraw_handler(struct widget *widget, void *data)
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{
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struct keyboard *keyboard = data;
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cairo_surface_t *surface;
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struct rectangle allocation;
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cairo_t *cr;
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unsigned int i;
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unsigned int row = 0, col = 0;
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surface = window_get_surface(keyboard->window);
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widget_get_allocation(keyboard->widget, &allocation);
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cr = cairo_create(surface);
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cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
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cairo_clip(cr);
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cairo_select_font_face(cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
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cairo_set_font_size(cr, 16);
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cairo_translate(cr, allocation.x, allocation.y);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_rgba(cr, 1, 1, 1, 0.75);
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cairo_rectangle(cr, 0, 0, columns * key_width, rows * key_height);
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cairo_paint(cr);
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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for (i = 0; i < sizeof(keys) / sizeof(*keys); ++i) {
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cairo_set_source_rgb(cr, 0, 0, 0);
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draw_key(&keys[i], cr, keyboard->state, row, col);
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col += keys[i].width;
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if (col >= columns) {
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row += 1;
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col = 0;
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}
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}
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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}
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static void
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resize_handler(struct widget *widget,
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int32_t width, int32_t height, void *data)
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{
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/* struct keyboard *keyboard = data; */
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}
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static void
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virtual_keyboard_commit_preedit(struct virtual_keyboard *keyboard)
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{
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if (!keyboard->preedit_string ||
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strlen(keyboard->preedit_string) == 0)
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return;
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input_method_context_preedit_string(keyboard->context,
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"",
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0);
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input_method_context_commit_string(keyboard->context,
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keyboard->preedit_string,
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strlen(keyboard->preedit_string));
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free(keyboard->preedit_string);
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keyboard->preedit_string = strdup("");
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}
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static void
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keyboard_handle_key(struct keyboard *keyboard, uint32_t time, const struct key *key, struct input *input, enum wl_pointer_button_state state)
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{
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const char *label = keyboard->state == keyboardstate_default ? key->label : key->alt;
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xkb_mod_mask_t mod_mask = keyboard->state == keyboardstate_default ? 0 : keyboard->keyboard->keysym.shift_mask;
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uint32_t key_state = (state == WL_POINTER_BUTTON_STATE_PRESSED) ? WL_KEYBOARD_KEY_STATE_PRESSED : WL_KEYBOARD_KEY_STATE_RELEASED;
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switch (key->key_type) {
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case keytype_default:
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if (state != WL_POINTER_BUTTON_STATE_PRESSED)
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break;
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keyboard->keyboard->preedit_string = strcat(keyboard->keyboard->preedit_string,
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label);
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input_method_context_preedit_string(keyboard->keyboard->context,
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keyboard->keyboard->preedit_string,
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strlen(keyboard->keyboard->preedit_string));
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break;
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case keytype_backspace:
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if (state != WL_POINTER_BUTTON_STATE_PRESSED)
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break;
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if (strlen(keyboard->keyboard->preedit_string) == 0) {
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input_method_context_delete_surrounding_text(keyboard->keyboard->context,
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-1, 1);
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} else {
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keyboard->keyboard->preedit_string[strlen(keyboard->keyboard->preedit_string) - 1] = '\0';
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input_method_context_preedit_string(keyboard->keyboard->context,
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keyboard->keyboard->preedit_string,
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strlen(keyboard->keyboard->preedit_string));
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}
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break;
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case keytype_enter:
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virtual_keyboard_commit_preedit(keyboard->keyboard);
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input_method_context_keysym(keyboard->keyboard->context,
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display_get_serial(keyboard->keyboard->display),
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time,
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XKB_KEY_Return, key_state, mod_mask);
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break;
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case keytype_space:
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if (state != WL_POINTER_BUTTON_STATE_PRESSED)
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break;
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keyboard->keyboard->preedit_string = strcat(keyboard->keyboard->preedit_string,
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" ");
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virtual_keyboard_commit_preedit(keyboard->keyboard);
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break;
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case keytype_switch:
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if (state != WL_POINTER_BUTTON_STATE_PRESSED)
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break;
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if (keyboard->state == keyboardstate_default)
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keyboard->state = keyboardstate_uppercase;
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else
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keyboard->state = keyboardstate_default;
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break;
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case keytype_symbols:
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if (state != WL_POINTER_BUTTON_STATE_PRESSED)
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break;
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break;
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case keytype_tab:
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virtual_keyboard_commit_preedit(keyboard->keyboard);
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input_method_context_keysym(keyboard->keyboard->context,
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display_get_serial(keyboard->keyboard->display),
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time,
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XKB_KEY_Tab, key_state, mod_mask);
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break;
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case keytype_arrow_up:
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virtual_keyboard_commit_preedit(keyboard->keyboard);
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input_method_context_keysym(keyboard->keyboard->context,
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display_get_serial(keyboard->keyboard->display),
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time,
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XKB_KEY_Up, key_state, mod_mask);
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break;
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case keytype_arrow_left:
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virtual_keyboard_commit_preedit(keyboard->keyboard);
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input_method_context_keysym(keyboard->keyboard->context,
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display_get_serial(keyboard->keyboard->display),
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time,
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XKB_KEY_Left, key_state, mod_mask);
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break;
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case keytype_arrow_right:
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virtual_keyboard_commit_preedit(keyboard->keyboard);
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input_method_context_keysym(keyboard->keyboard->context,
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display_get_serial(keyboard->keyboard->display),
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time,
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XKB_KEY_Right, key_state, mod_mask);
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break;
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case keytype_arrow_down:
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virtual_keyboard_commit_preedit(keyboard->keyboard);
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input_method_context_keysym(keyboard->keyboard->context,
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display_get_serial(keyboard->keyboard->display),
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time,
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XKB_KEY_Down, key_state, mod_mask);
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break;
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}
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}
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static void
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button_handler(struct widget *widget,
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struct input *input, uint32_t time,
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uint32_t button,
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enum wl_pointer_button_state state, void *data)
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{
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struct keyboard *keyboard = data;
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struct rectangle allocation;
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int32_t x, y;
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int row, col;
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unsigned int i;
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if (button != BTN_LEFT) {
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return;
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}
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input_get_position(input, &x, &y);
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widget_get_allocation(keyboard->widget, &allocation);
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x -= allocation.x;
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y -= allocation.y;
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row = y / key_height;
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col = x / key_width + row * columns;
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for (i = 0; i < sizeof(keys) / sizeof(*keys); ++i) {
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col -= keys[i].width;
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if (col < 0) {
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keyboard_handle_key(keyboard, time, &keys[i], input, state);
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break;
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}
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}
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widget_schedule_redraw(widget);
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}
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static void
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input_method_context_surrounding_text(void *data,
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struct input_method_context *context,
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const char *text,
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uint32_t cursor,
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uint32_t anchor)
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{
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fprintf(stderr, "Surrounding text updated: %s\n", text);
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}
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static void
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input_method_context_reset(void *data,
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struct input_method_context *context)
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{
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struct virtual_keyboard *keyboard = data;
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fprintf(stderr, "Reset pre-edit buffer\n");
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if (strlen(keyboard->preedit_string)) {
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input_method_context_preedit_string(context,
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"",
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0);
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free(keyboard->preedit_string);
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keyboard->preedit_string = strdup("");
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}
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}
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static const struct input_method_context_listener input_method_context_listener = {
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input_method_context_surrounding_text,
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input_method_context_reset
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};
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static void
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input_method_activate(void *data,
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struct input_method *input_method,
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struct input_method_context *context)
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{
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struct virtual_keyboard *keyboard = data;
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struct wl_array modifiers_map;
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if (keyboard->context)
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input_method_context_destroy(keyboard->context);
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if (keyboard->preedit_string)
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free(keyboard->preedit_string);
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keyboard->preedit_string = strdup("");
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keyboard->context = context;
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input_method_context_add_listener(context,
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&input_method_context_listener,
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keyboard);
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wl_array_init(&modifiers_map);
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keysym_modifiers_add(&modifiers_map, "Shift");
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keysym_modifiers_add(&modifiers_map, "Control");
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keysym_modifiers_add(&modifiers_map, "Mod1");
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input_method_context_modifiers_map(context, &modifiers_map);
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keyboard->keysym.shift_mask = keysym_modifiers_get_mask(&modifiers_map, "Shift");
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wl_array_release(&modifiers_map);
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}
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static void
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input_method_deactivate(void *data,
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struct input_method *input_method,
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struct input_method_context *context)
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{
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struct virtual_keyboard *keyboard = data;
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if (!keyboard->context)
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return;
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input_method_context_destroy(keyboard->context);
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keyboard->context = NULL;
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}
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static const struct input_method_listener input_method_listener = {
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input_method_activate,
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input_method_deactivate
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};
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static void
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global_handler(struct display *display, uint32_t name,
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const char *interface, uint32_t version, void *data)
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{
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struct virtual_keyboard *keyboard = data;
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if (!strcmp(interface, "input_panel")) {
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keyboard->input_panel =
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display_bind(display, name, &input_panel_interface, 1);
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} else if (!strcmp(interface, "input_method")) {
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keyboard->input_method =
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display_bind(display, name,
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&input_method_interface, 1);
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input_method_add_listener(keyboard->input_method, &input_method_listener, keyboard);
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}
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}
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static void
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keyboard_create(struct output *output, struct virtual_keyboard *virtual_keyboard)
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{
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struct keyboard *keyboard;
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keyboard = malloc(sizeof *keyboard);
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memset(keyboard, 0, sizeof *keyboard);
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keyboard->keyboard = virtual_keyboard;
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keyboard->window = window_create_custom(virtual_keyboard->display);
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keyboard->widget = window_add_widget(keyboard->window, keyboard);
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window_set_title(keyboard->window, "Virtual keyboard");
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window_set_user_data(keyboard->window, keyboard);
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widget_set_redraw_handler(keyboard->widget, redraw_handler);
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widget_set_resize_handler(keyboard->widget, resize_handler);
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widget_set_button_handler(keyboard->widget, button_handler);
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window_schedule_resize(keyboard->window,
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columns * key_width,
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rows * key_height);
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input_panel_set_surface(virtual_keyboard->input_panel,
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window_get_wl_surface(keyboard->window),
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output_get_wl_output(output));
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}
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static void
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handle_output_configure(struct output *output, void *data)
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{
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struct virtual_keyboard *virtual_keyboard = data;
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/* skip existing outputs */
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if (output_get_user_data(output))
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return;
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output_set_user_data(output, virtual_keyboard);
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keyboard_create(output, virtual_keyboard);
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}
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int
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main(int argc, char *argv[])
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{
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struct virtual_keyboard virtual_keyboard;
|
|
|
|
virtual_keyboard.display = display_create(argc, argv);
|
|
if (virtual_keyboard.display == NULL) {
|
|
fprintf(stderr, "failed to create display: %m\n");
|
|
return -1;
|
|
}
|
|
|
|
virtual_keyboard.context = NULL;
|
|
virtual_keyboard.preedit_string = NULL;
|
|
|
|
display_set_user_data(virtual_keyboard.display, &virtual_keyboard);
|
|
display_set_global_handler(virtual_keyboard.display, global_handler);
|
|
display_set_output_configure_handler(virtual_keyboard.display, handle_output_configure);
|
|
|
|
display_run(virtual_keyboard.display);
|
|
|
|
return 0;
|
|
}
|