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weston/clients/editor.c

1571 lines
39 KiB

/*
* Copyright © 2012 Openismus GmbH
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <linux/input.h>
#include <cairo.h>
#include <pango/pangocairo.h>
#include "shared/helpers.h"
#include "window.h"
#include "text-input-unstable-v1-client-protocol.h"
struct text_entry {
struct widget *widget;
struct window *window;
char *text;
int active;
uint32_t cursor;
uint32_t anchor;
struct {
char *text;
int32_t cursor;
char *commit;
PangoAttrList *attr_list;
} preedit;
struct {
PangoAttrList *attr_list;
int32_t cursor;
} preedit_info;
struct {
int32_t cursor;
int32_t anchor;
uint32_t delete_index;
uint32_t delete_length;
bool invalid_delete;
} pending_commit;
struct zwp_text_input_v1 *text_input;
PangoLayout *layout;
struct {
xkb_mod_mask_t shift_mask;
} keysym;
uint32_t serial;
uint32_t reset_serial;
uint32_t content_purpose;
uint32_t click_to_show;
char *preferred_language;
bool button_pressed;
};
struct editor {
struct zwp_text_input_manager_v1 *text_input_manager;
struct wl_data_source *selection;
char *selected_text;
struct display *display;
struct window *window;
struct widget *widget;
struct text_entry *entry;
struct text_entry *editor;
struct text_entry *active_entry;
};
static const char *
utf8_end_char(const char *p)
{
while ((*p & 0xc0) == 0x80)
p++;
return p;
}
static const char *
utf8_prev_char(const char *s, const char *p)
{
for (--p; p >= s; --p) {
if ((*p & 0xc0) != 0x80)
return p;
}
return NULL;
}
static const char *
utf8_next_char(const char *p)
{
if (*p != 0)
return utf8_end_char(++p);
return NULL;
}
static void
move_up(const char *p, uint32_t *cursor)
{
const char *posr, *posr_i;
char text[16];
xkb_keysym_to_utf8(XKB_KEY_Return, text, sizeof(text));
posr = strstr(p, text);
while (posr) {
if (*cursor > (unsigned)(posr-p)) {
posr_i = strstr(posr+1, text);
if (!posr_i || !(*cursor > (unsigned)(posr_i-p))) {
*cursor = posr-p;
break;
}
posr = posr_i;
} else {
break;
}
}
}
static void
move_down(const char *p, uint32_t *cursor)
{
const char *posr;
char text[16];
xkb_keysym_to_utf8(XKB_KEY_Return, text, sizeof(text));
posr = strstr(p, text);
while (posr) {
if (*cursor <= (unsigned)(posr-p)) {
*cursor = posr-p + 1;
break;
}
posr = strstr(posr+1, text);
}
}
static void text_entry_redraw_handler(struct widget *widget, void *data);
static void text_entry_button_handler(struct widget *widget,
struct input *input, uint32_t time,
uint32_t button,
enum wl_pointer_button_state state, void *data);
static void text_entry_touch_handler(struct widget *widget, struct input *input,
uint32_t serial, uint32_t time, int32_t id,
float tx, float ty, void *data);
static int text_entry_motion_handler(struct widget *widget,
struct input *input, uint32_t time,
float x, float y, void *data);
static void text_entry_insert_at_cursor(struct text_entry *entry, const char *text,
int32_t cursor, int32_t anchor);
static void text_entry_set_preedit(struct text_entry *entry,
const char *preedit_text,
int preedit_cursor);
static void text_entry_delete_text(struct text_entry *entry,
uint32_t index, uint32_t length);
static void text_entry_delete_selected_text(struct text_entry *entry);
static void text_entry_reset_preedit(struct text_entry *entry);
static void text_entry_commit_and_reset(struct text_entry *entry);
static void text_entry_get_cursor_rectangle(struct text_entry *entry, struct rectangle *rectangle);
static void text_entry_update(struct text_entry *entry);
static void
text_input_commit_string(void *data,
struct zwp_text_input_v1 *text_input,
uint32_t serial,
const char *text)
{
struct text_entry *entry = data;
if ((entry->serial - serial) > (entry->serial - entry->reset_serial)) {
fprintf(stderr, "Ignore commit. Serial: %u, Current: %u, Reset: %u\n",
serial, entry->serial, entry->reset_serial);
return;
}
if (entry->pending_commit.invalid_delete) {
fprintf(stderr, "Ignore commit. Invalid previous delete_surrounding event.\n");
memset(&entry->pending_commit, 0, sizeof entry->pending_commit);
return;
}
text_entry_reset_preedit(entry);
if (entry->pending_commit.delete_length) {
text_entry_delete_text(entry,
entry->pending_commit.delete_index,
entry->pending_commit.delete_length);
} else {
text_entry_delete_selected_text(entry);
}
text_entry_insert_at_cursor(entry, text,
entry->pending_commit.cursor,
entry->pending_commit.anchor);
memset(&entry->pending_commit, 0, sizeof entry->pending_commit);
widget_schedule_redraw(entry->widget);
}
static void
clear_pending_preedit(struct text_entry *entry)
{
memset(&entry->pending_commit, 0, sizeof entry->pending_commit);
pango_attr_list_unref(entry->preedit_info.attr_list);
entry->preedit_info.cursor = 0;
entry->preedit_info.attr_list = NULL;
memset(&entry->preedit_info, 0, sizeof entry->preedit_info);
}
static void
text_input_preedit_string(void *data,
struct zwp_text_input_v1 *text_input,
uint32_t serial,
const char *text,
const char *commit)
{
struct text_entry *entry = data;
if ((entry->serial - serial) > (entry->serial - entry->reset_serial)) {
fprintf(stderr, "Ignore preedit_string. Serial: %u, Current: %u, Reset: %u\n",
serial, entry->serial, entry->reset_serial);
clear_pending_preedit(entry);
return;
}
if (entry->pending_commit.invalid_delete) {
fprintf(stderr, "Ignore preedit_string. Invalid previous delete_surrounding event.\n");
clear_pending_preedit(entry);
return;
}
if (entry->pending_commit.delete_length) {
text_entry_delete_text(entry,
entry->pending_commit.delete_index,
entry->pending_commit.delete_length);
} else {
text_entry_delete_selected_text(entry);
}
text_entry_set_preedit(entry, text, entry->preedit_info.cursor);
entry->preedit.commit = strdup(commit);
entry->preedit.attr_list = pango_attr_list_ref(entry->preedit_info.attr_list);
clear_pending_preedit(entry);
text_entry_update(entry);
widget_schedule_redraw(entry->widget);
}
static void
text_input_delete_surrounding_text(void *data,
struct zwp_text_input_v1 *text_input,
int32_t index,
uint32_t length)
{
struct text_entry *entry = data;
uint32_t text_length;
entry->pending_commit.delete_index = entry->cursor + index;
entry->pending_commit.delete_length = length;
entry->pending_commit.invalid_delete = false;
text_length = strlen(entry->text);
if (entry->pending_commit.delete_index > text_length ||
length > text_length ||
entry->pending_commit.delete_index + length > text_length) {
fprintf(stderr, "delete_surrounding_text: Invalid index: %d," \
"length %u'; cursor: %u text length: %u\n", index, length, entry->cursor, text_length);
entry->pending_commit.invalid_delete = true;
return;
}
}
static void
text_input_cursor_position(void *data,
struct zwp_text_input_v1 *text_input,
int32_t index,
int32_t anchor)
{
struct text_entry *entry = data;
entry->pending_commit.cursor = index;
entry->pending_commit.anchor = anchor;
}
static void
text_input_preedit_styling(void *data,
struct zwp_text_input_v1 *text_input,
uint32_t index,
uint32_t length,
uint32_t style)
{
struct text_entry *entry = data;
PangoAttribute *attr1 = NULL;
PangoAttribute *attr2 = NULL;
if (!entry->preedit_info.attr_list)
entry->preedit_info.attr_list = pango_attr_list_new();
switch (style) {
case ZWP_TEXT_INPUT_V1_PREEDIT_STYLE_DEFAULT:
case ZWP_TEXT_INPUT_V1_PREEDIT_STYLE_UNDERLINE:
attr1 = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
break;
case ZWP_TEXT_INPUT_V1_PREEDIT_STYLE_INCORRECT:
attr1 = pango_attr_underline_new(PANGO_UNDERLINE_ERROR);
attr2 = pango_attr_underline_color_new(65535, 0, 0);
break;
case ZWP_TEXT_INPUT_V1_PREEDIT_STYLE_SELECTION:
attr1 = pango_attr_background_new(0.3 * 65535, 0.3 * 65535, 65535);
attr2 = pango_attr_foreground_new(65535, 65535, 65535);
break;
case ZWP_TEXT_INPUT_V1_PREEDIT_STYLE_HIGHLIGHT:
case ZWP_TEXT_INPUT_V1_PREEDIT_STYLE_ACTIVE:
attr1 = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
attr2 = pango_attr_weight_new(PANGO_WEIGHT_BOLD);
break;
case ZWP_TEXT_INPUT_V1_PREEDIT_STYLE_INACTIVE:
attr1 = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
attr2 = pango_attr_foreground_new(0.3 * 65535, 0.3 * 65535, 0.3 * 65535);
break;
}
if (attr1) {
attr1->start_index = entry->cursor + index;
attr1->end_index = entry->cursor + index + length;
pango_attr_list_insert(entry->preedit_info.attr_list, attr1);
}
if (attr2) {
attr2->start_index = entry->cursor + index;
attr2->end_index = entry->cursor + index + length;
pango_attr_list_insert(entry->preedit_info.attr_list, attr2);
}
}
static void
text_input_preedit_cursor(void *data,
struct zwp_text_input_v1 *text_input,
int32_t index)
{
struct text_entry *entry = data;
entry->preedit_info.cursor = index;
}
static void
text_input_modifiers_map(void *data,
struct zwp_text_input_v1 *text_input,
struct wl_array *map)
{
struct text_entry *entry = data;
entry->keysym.shift_mask = keysym_modifiers_get_mask(map, "Shift");
}
static void
text_input_keysym(void *data,
struct zwp_text_input_v1 *text_input,
uint32_t serial,
uint32_t time,
uint32_t key,
uint32_t state,
uint32_t modifiers)
{
struct text_entry *entry = data;
const char *new_char;
if (key == XKB_KEY_Left ||
key == XKB_KEY_Right) {
if (state != WL_KEYBOARD_KEY_STATE_RELEASED)
return;
if (key == XKB_KEY_Left)
new_char = utf8_prev_char(entry->text, entry->text + entry->cursor);
else
new_char = utf8_next_char(entry->text + entry->cursor);
if (new_char != NULL) {
entry->cursor = new_char - entry->text;
}
if (!(modifiers & entry->keysym.shift_mask))
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
return;
}
if (key == XKB_KEY_Up ||
key == XKB_KEY_Down) {
if (state != WL_KEYBOARD_KEY_STATE_RELEASED)
return;
if (key == XKB_KEY_Up)
move_up(entry->text, &entry->cursor);
else
move_down(entry->text, &entry->cursor);
if (!(modifiers & entry->keysym.shift_mask))
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
return;
}
if (key == XKB_KEY_BackSpace) {
const char *start, *end;
if (state != WL_KEYBOARD_KEY_STATE_RELEASED)
return;
text_entry_commit_and_reset(entry);
start = utf8_prev_char(entry->text, entry->text + entry->cursor);
if (start == NULL)
return;
end = utf8_next_char(start);
text_entry_delete_text(entry,
start - entry->text,
end - start);
return;
}
if (key == XKB_KEY_Tab ||
key == XKB_KEY_KP_Enter ||
key == XKB_KEY_Return) {
char text[16];
if (state != WL_KEYBOARD_KEY_STATE_RELEASED)
return;
xkb_keysym_to_utf8(key, text, sizeof(text));
text_entry_insert_at_cursor(entry, text, 0, 0);
return;
}
}
static void
text_input_enter(void *data,
struct zwp_text_input_v1 *text_input,
struct wl_surface *surface)
{
struct text_entry *entry = data;
if (surface != window_get_wl_surface(entry->window))
return;
entry->active++;
text_entry_update(entry);
entry->reset_serial = entry->serial;
widget_schedule_redraw(entry->widget);
}
static void
text_input_leave(void *data,
struct zwp_text_input_v1 *text_input)
{
struct text_entry *entry = data;
text_entry_commit_and_reset(entry);
entry->active--;
if (!entry->active)
zwp_text_input_v1_hide_input_panel(text_input);
widget_schedule_redraw(entry->widget);
}
static void
text_input_input_panel_state(void *data,
struct zwp_text_input_v1 *text_input,
uint32_t state)
{
}
static void
text_input_language(void *data,
struct zwp_text_input_v1 *text_input,
uint32_t serial,
const char *language)
{
fprintf(stderr, "input language is %s \n", language);
}
static void
text_input_text_direction(void *data,
struct zwp_text_input_v1 *text_input,
uint32_t serial,
uint32_t direction)
{
struct text_entry *entry = data;
PangoContext *context = pango_layout_get_context(entry->layout);
PangoDirection pango_direction;
switch (direction) {
case ZWP_TEXT_INPUT_V1_TEXT_DIRECTION_LTR:
pango_direction = PANGO_DIRECTION_LTR;
break;
case ZWP_TEXT_INPUT_V1_TEXT_DIRECTION_RTL:
pango_direction = PANGO_DIRECTION_RTL;
break;
case ZWP_TEXT_INPUT_V1_TEXT_DIRECTION_AUTO:
default:
pango_direction = PANGO_DIRECTION_NEUTRAL;
}
pango_context_set_base_dir(context, pango_direction);
}
static const struct zwp_text_input_v1_listener text_input_listener = {
text_input_enter,
text_input_leave,
text_input_modifiers_map,
text_input_input_panel_state,
text_input_preedit_string,
text_input_preedit_styling,
text_input_preedit_cursor,
text_input_commit_string,
text_input_cursor_position,
text_input_delete_surrounding_text,
text_input_keysym,
text_input_language,
text_input_text_direction
};
static void
data_source_target(void *data,
struct wl_data_source *source, const char *mime_type)
{
}
static void
data_source_send(void *data,
struct wl_data_source *source,
const char *mime_type, int32_t fd)
{
struct editor *editor = data;
if (write(fd, editor->selected_text, strlen(editor->selected_text) + 1) < 0)
fprintf(stderr, "write failed: %m\n");
}
static void
data_source_cancelled(void *data, struct wl_data_source *source)
{
wl_data_source_destroy(source);
}
static const struct wl_data_source_listener data_source_listener = {
data_source_target,
data_source_send,
data_source_cancelled
};
static void
paste_func(void *buffer, size_t len,
int32_t x, int32_t y, void *data)
{
struct editor *editor = data;
struct text_entry *entry = editor->active_entry;
char *pasted_text;
if (!entry)
return;
pasted_text = malloc(len + 1);
strncpy(pasted_text, buffer, len);
pasted_text[len] = '\0';
text_entry_insert_at_cursor(entry, pasted_text, 0, 0);
free(pasted_text);
}
static void
editor_copy_cut(struct editor *editor, struct input *input, bool cut)
{
struct text_entry *entry = editor->active_entry;
if (!entry)
return;
if (entry->cursor != entry->anchor) {
int start_index = MIN(entry->cursor, entry->anchor);
int end_index = MAX(entry->cursor, entry->anchor);
int len = end_index - start_index;
editor->selected_text = realloc(editor->selected_text, len + 1);
strncpy(editor->selected_text, &entry->text[start_index], len);
editor->selected_text[len] = '\0';
if (cut)
text_entry_delete_text(entry, start_index, len);
editor->selection =
display_create_data_source(editor->display);
wl_data_source_offer(editor->selection,
"text/plain;charset=utf-8");
wl_data_source_add_listener(editor->selection,
&data_source_listener, editor);
input_set_selection(input, editor->selection,
display_get_serial(editor->display));
}
}
static void
editor_paste(struct editor *editor, struct input *input)
{
input_receive_selection_data(input,
"text/plain;charset=utf-8",
paste_func, editor);
}
static void
menu_func(void *data, struct input *input, int index)
{
struct window *window = data;
struct editor *editor = window_get_user_data(window);
fprintf(stderr, "picked entry %d\n", index);
switch (index) {
case 0:
editor_copy_cut(editor, input, true);
break;
case 1:
editor_copy_cut(editor, input, false);
break;
case 2:
editor_paste(editor, input);
break;
}
}
static void
show_menu(struct editor *editor, struct input *input, uint32_t time)
{
int32_t x, y;
static const char *entries[] = {
"Cut", "Copy", "Paste"
};
input_get_position(input, &x, &y);
window_show_menu(editor->display, input, time, editor->window,
x + 10, y + 20, menu_func,
entries, ARRAY_LENGTH(entries));
}
static struct text_entry*
text_entry_create(struct editor *editor, const char *text)
{
struct text_entry *entry;
entry = xzalloc(sizeof *entry);
entry->widget = widget_add_widget(editor->widget, entry);
entry->window = editor->window;
entry->text = strdup(text);
entry->active = 0;
entry->cursor = strlen(text);
entry->anchor = entry->cursor;
entry->text_input =
zwp_text_input_manager_v1_create_text_input(editor->text_input_manager);
zwp_text_input_v1_add_listener(entry->text_input,
&text_input_listener, entry);
widget_set_redraw_handler(entry->widget, text_entry_redraw_handler);
widget_set_button_handler(entry->widget, text_entry_button_handler);
widget_set_motion_handler(entry->widget, text_entry_motion_handler);
widget_set_touch_down_handler(entry->widget, text_entry_touch_handler);
return entry;
}
static void
text_entry_destroy(struct text_entry *entry)
{
widget_destroy(entry->widget);
zwp_text_input_v1_destroy(entry->text_input);
g_clear_object(&entry->layout);
free(entry->text);
free(entry);
}
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);
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)
{
widget_set_allocation(entry->widget, x, y, width, height);
}
static void
resize_handler(struct widget *widget,
int32_t width, int32_t height, void *data)
{
struct editor *editor = data;
struct rectangle allocation;
widget_get_allocation(editor->widget, &allocation);
text_entry_allocate(editor->entry,
allocation.x + 20, allocation.y + 20,
width - 40, height / 2 - 40);
text_entry_allocate(editor->editor,
allocation.x + 20, allocation.y + height / 2 + 20,
width - 40, height / 2 - 40);
}
static void
text_entry_activate(struct text_entry *entry,
struct wl_seat *seat)
{
struct wl_surface *surface = window_get_wl_surface(entry->window);
if (entry->click_to_show && entry->active) {
zwp_text_input_v1_show_input_panel(entry->text_input);
return;
}
if (!entry->click_to_show)
zwp_text_input_v1_show_input_panel(entry->text_input);
zwp_text_input_v1_activate(entry->text_input,
seat,
surface);
}
static void
text_entry_deactivate(struct text_entry *entry,
struct wl_seat *seat)
{
zwp_text_input_v1_deactivate(entry->text_input,
seat);
}
static void
text_entry_update_layout(struct text_entry *entry)
{
char *text;
PangoAttrList *attr_list;
assert(entry->cursor <= (strlen(entry->text) +
(entry->preedit.text ? strlen(entry->preedit.text) : 0)));
if (entry->preedit.text) {
text = xmalloc(strlen(entry->text) + strlen(entry->preedit.text) + 1);
strncpy(text, entry->text, entry->cursor);
strcpy(text + entry->cursor, entry->preedit.text);
strcpy(text + entry->cursor + strlen(entry->preedit.text),
entry->text + entry->cursor);
} else {
text = strdup(entry->text);
}
if (entry->cursor != entry->anchor) {
int start_index = MIN(entry->cursor, entry->anchor);
int end_index = MAX(entry->cursor, entry->anchor);
PangoAttribute *attr;
attr_list = pango_attr_list_copy(entry->preedit.attr_list);
if (!attr_list)
attr_list = pango_attr_list_new();
attr = pango_attr_background_new(0.3 * 65535, 0.3 * 65535, 65535);
attr->start_index = start_index;
attr->end_index = end_index;
pango_attr_list_insert(attr_list, attr);
attr = pango_attr_foreground_new(65535, 65535, 65535);
attr->start_index = start_index;
attr->end_index = end_index;
pango_attr_list_insert(attr_list, attr);
} else {
attr_list = pango_attr_list_ref(entry->preedit.attr_list);
}
if (entry->preedit.text && !entry->preedit.attr_list) {
PangoAttribute *attr;
if (!attr_list)
attr_list = pango_attr_list_new();
attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
attr->start_index = entry->cursor;
attr->end_index = entry->cursor + strlen(entry->preedit.text);
pango_attr_list_insert(attr_list, attr);
}
if (entry->layout) {
pango_layout_set_text(entry->layout, text, -1);
pango_layout_set_attributes(entry->layout, attr_list);
}
free(text);
pango_attr_list_unref(attr_list);
}
static void
text_entry_update(struct text_entry *entry)
{
struct rectangle cursor_rectangle;
zwp_text_input_v1_set_content_type(entry->text_input,
ZWP_TEXT_INPUT_V1_CONTENT_HINT_NONE,
entry->content_purpose);
zwp_text_input_v1_set_surrounding_text(entry->text_input,
entry->text,
entry->cursor,
entry->anchor);
if (entry->preferred_language)
zwp_text_input_v1_set_preferred_language(entry->text_input,
entry->preferred_language);
text_entry_get_cursor_rectangle(entry, &cursor_rectangle);
zwp_text_input_v1_set_cursor_rectangle(entry->text_input,
cursor_rectangle.x,
cursor_rectangle.y,
cursor_rectangle.width,
cursor_rectangle.height);
zwp_text_input_v1_commit_state(entry->text_input, ++entry->serial);
}
static void
text_entry_insert_at_cursor(struct text_entry *entry, const char *text,
int32_t cursor, int32_t anchor)
{
char *new_text = xmalloc(strlen(entry->text) + strlen(text) + 1);
strncpy(new_text, entry->text, entry->cursor);
strcpy(new_text + entry->cursor, text);
strcpy(new_text + entry->cursor + strlen(text),
entry->text + entry->cursor);
free(entry->text);
entry->text = new_text;
if (anchor >= 0)
entry->anchor = entry->cursor + strlen(text) + anchor;
else
entry->anchor = entry->cursor + 1 + anchor;
if (cursor >= 0)
entry->cursor += strlen(text) + cursor;
else
entry->cursor += 1 + cursor;
text_entry_update_layout(entry);
widget_schedule_redraw(entry->widget);
text_entry_update(entry);
}
static void
text_entry_reset_preedit(struct text_entry *entry)
{
entry->preedit.cursor = 0;
free(entry->preedit.text);
entry->preedit.text = NULL;
free(entry->preedit.commit);
entry->preedit.commit = NULL;
pango_attr_list_unref(entry->preedit.attr_list);
entry->preedit.attr_list = NULL;
}
static void
text_entry_commit_and_reset(struct text_entry *entry)
{
char *commit = NULL;
if (entry->preedit.commit)
commit = strdup(entry->preedit.commit);
text_entry_reset_preedit(entry);
if (commit) {
text_entry_insert_at_cursor(entry, commit, 0, 0);
free(commit);
}
zwp_text_input_v1_reset(entry->text_input);
text_entry_update(entry);
entry->reset_serial = entry->serial;
}
static void
text_entry_set_preedit(struct text_entry *entry,
const char *preedit_text,
int preedit_cursor)
{
text_entry_reset_preedit(entry);
if (!preedit_text)
return;
entry->preedit.text = strdup(preedit_text);
entry->preedit.cursor = preedit_cursor;
text_entry_update_layout(entry);
widget_schedule_redraw(entry->widget);
}
static uint32_t
text_entry_try_invoke_preedit_action(struct text_entry *entry,
int32_t x, int32_t y,
uint32_t button,
enum wl_pointer_button_state state)
{
int index, trailing;
uint32_t cursor;
const char *text;
if (!entry->preedit.text)
return 0;
pango_layout_xy_to_index(entry->layout,
x * PANGO_SCALE, y * PANGO_SCALE,
&index, &trailing);
text = pango_layout_get_text(entry->layout);
cursor = g_utf8_offset_to_pointer(text + index, trailing) - text;
if (cursor < entry->cursor ||
cursor > entry->cursor + strlen(entry->preedit.text)) {
return 0;
}
if (state == WL_POINTER_BUTTON_STATE_RELEASED)
zwp_text_input_v1_invoke_action(entry->text_input,
button,
cursor - entry->cursor);
return 1;
}
static bool
text_entry_has_preedit(struct text_entry *entry)
{
return entry->preedit.text && (strlen(entry->preedit.text) > 0);
}
static void
text_entry_set_cursor_position(struct text_entry *entry,
int32_t x, int32_t y,
bool move_anchor)
{
int index, trailing;
const char *text;
uint32_t cursor;
pango_layout_xy_to_index(entry->layout,
x * PANGO_SCALE, y * PANGO_SCALE,
&index, &trailing);
text = pango_layout_get_text(entry->layout);
cursor = g_utf8_offset_to_pointer(text + index, trailing) - text;
if (move_anchor)
entry->anchor = cursor;
if (text_entry_has_preedit(entry)) {
text_entry_commit_and_reset(entry);
assert(!text_entry_has_preedit(entry));
}
if (entry->cursor == cursor)
return;
entry->cursor = cursor;
text_entry_update_layout(entry);
widget_schedule_redraw(entry->widget);
text_entry_update(entry);
}
static void
text_entry_delete_text(struct text_entry *entry,
uint32_t index, uint32_t length)
{
uint32_t l;
assert(index <= strlen(entry->text));
assert(index + length <= strlen(entry->text));
assert(index + length >= length);
l = strlen(entry->text + index + length);
memmove(entry->text + index,
entry->text + index + length,
l + 1);
if (entry->cursor > (index + length))
entry->cursor -= length;
else if (entry->cursor > index)
entry->cursor = index;
entry->anchor = entry->cursor;
text_entry_update_layout(entry);
widget_schedule_redraw(entry->widget);
text_entry_update(entry);
}
static void
text_entry_delete_selected_text(struct text_entry *entry)
{
uint32_t start_index = entry->anchor < entry->cursor ? entry->anchor : entry->cursor;
uint32_t end_index = entry->anchor < entry->cursor ? entry->cursor : entry->anchor;
if (entry->anchor == entry->cursor)
return;
text_entry_delete_text(entry, start_index, end_index - start_index);
entry->anchor = entry->cursor;
}
static void
text_entry_get_cursor_rectangle(struct text_entry *entry, struct rectangle *rectangle)
{
struct rectangle allocation;
PangoRectangle extents;
PangoRectangle cursor_pos;
widget_get_allocation(entry->widget, &allocation);
if (entry->preedit.text && entry->preedit.cursor < 0) {
rectangle->x = 0;
rectangle->y = 0;
rectangle->width = 0;
rectangle->height = 0;
return;
}
pango_layout_get_extents(entry->layout, &extents, NULL);
pango_layout_get_cursor_pos(entry->layout,
entry->cursor + entry->preedit.cursor,
&cursor_pos, NULL);
rectangle->x = allocation.x + (allocation.height / 2) + PANGO_PIXELS(cursor_pos.x);
rectangle->y = allocation.y + 10 + PANGO_PIXELS(cursor_pos.y);
rectangle->width = PANGO_PIXELS(cursor_pos.width);
rectangle->height = PANGO_PIXELS(cursor_pos.height);
}
static void
text_entry_draw_cursor(struct text_entry *entry, cairo_t *cr)
{
PangoRectangle extents;
PangoRectangle cursor_pos;
if (entry->preedit.text && entry->preedit.cursor < 0)
return;
pango_layout_get_extents(entry->layout, &extents, NULL);
pango_layout_get_cursor_pos(entry->layout,
entry->cursor + entry->preedit.cursor,
&cursor_pos, NULL);
cairo_set_line_width(cr, 1.0);
cairo_move_to(cr, PANGO_PIXELS(cursor_pos.x), PANGO_PIXELS(cursor_pos.y));
cairo_line_to(cr, PANGO_PIXELS(cursor_pos.x), PANGO_PIXELS(cursor_pos.y) + PANGO_PIXELS(cursor_pos.height));
cairo_stroke(cr);
}
static int
text_offset_left(struct rectangle *allocation)
{
return 10;
}
static int
text_offset_top(struct rectangle *allocation)
{
return allocation->height / 2;
}
static void
text_entry_redraw_handler(struct widget *widget, void *data)
{
struct text_entry *entry = data;
cairo_surface_t *surface;
struct rectangle allocation;
cairo_t *cr;
surface = window_get_surface(entry->window);
widget_get_allocation(entry->widget, &allocation);
cr = cairo_create(surface);
cairo_rectangle(cr, allocation.x, allocation.y, allocation.width, allocation.height);
cairo_clip(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_push_group(cr);
cairo_translate(cr, allocation.x, allocation.y);
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
cairo_fill(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
if (entry->active) {
cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
cairo_set_line_width (cr, 3);
cairo_set_source_rgba(cr, 0, 0, 1, 1.0);
cairo_stroke(cr);
}
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_translate(cr,
text_offset_left(&allocation),
text_offset_top(&allocation));
if (!entry->layout)
entry->layout = pango_cairo_create_layout(cr);
else
pango_cairo_update_layout(cr, entry->layout);
text_entry_update_layout(entry);
pango_cairo_show_layout(cr, entry->layout);
text_entry_draw_cursor(entry, cr);
cairo_pop_group_to_source(cr);
cairo_paint(cr);
cairo_destroy(cr);
cairo_surface_destroy(surface);
}
static int
text_entry_motion_handler(struct widget *widget,
struct input *input, uint32_t time,
float x, float y, void *data)
{
struct text_entry *entry = data;
struct rectangle allocation;
int tx, ty;
if (!entry->button_pressed) {
return CURSOR_IBEAM;
}
widget_get_allocation(entry->widget, &allocation);
tx = x - allocation.x - text_offset_left(&allocation);
ty = y - allocation.y - text_offset_top(&allocation);
text_entry_set_cursor_position(entry, tx, ty, false);
return CURSOR_IBEAM;
}
static void
text_entry_button_handler(struct widget *widget,
struct input *input, uint32_t time,
uint32_t button,
enum wl_pointer_button_state state, void *data)
{
struct text_entry *entry = data;
struct rectangle allocation;
struct editor *editor;
int32_t x, y;
uint32_t result;
widget_get_allocation(entry->widget, &allocation);
input_get_position(input, &x, &y);
x -= allocation.x + text_offset_left(&allocation);
y -= allocation.y + text_offset_top(&allocation);
editor = window_get_user_data(entry->window);
switch (button) {
case BTN_LEFT:
entry->button_pressed = (state == WL_POINTER_BUTTON_STATE_PRESSED);
if (state == WL_POINTER_BUTTON_STATE_PRESSED)
input_grab(input, entry->widget, button);
else
input_ungrab(input);
break;
case BTN_RIGHT:
if (state == WL_POINTER_BUTTON_STATE_PRESSED)
show_menu(editor, input, time);
break;
}
if (text_entry_has_preedit(entry)) {
result = text_entry_try_invoke_preedit_action(entry, x, y, button, state);
if (result)
return;
}
if (state == WL_POINTER_BUTTON_STATE_PRESSED &&
button == BTN_LEFT) {
struct wl_seat *seat = input_get_seat(input);
text_entry_activate(entry, seat);
editor->active_entry = entry;
text_entry_set_cursor_position(entry, x, y, true);
}
}
static void
text_entry_touch_handler(struct widget *widget, struct input *input,
uint32_t serial, uint32_t time, int32_t id,
float tx, float ty, void *data)
{
struct text_entry *entry = data;
struct wl_seat *seat = input_get_seat(input);
struct rectangle allocation;
struct editor *editor;
int32_t x, y;
widget_get_allocation(entry->widget, &allocation);
x = tx - (allocation.x + text_offset_left(&allocation));
y = ty - (allocation.y + text_offset_top(&allocation));
editor = window_get_user_data(entry->window);
text_entry_activate(entry, seat);
editor->active_entry = entry;
text_entry_set_cursor_position(entry, x, y, true);
}
static void
editor_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;
if (button != BTN_LEFT) {
return;
}
if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
struct wl_seat *seat = input_get_seat(input);
text_entry_deactivate(editor->entry, seat);
text_entry_deactivate(editor->editor, seat);
editor->active_entry = NULL;
}
}
static void
editor_touch_handler(struct widget *widget, struct input *input,
uint32_t serial, uint32_t time, int32_t id,
float tx, float ty, void *data)
{
struct editor *editor = data;
struct wl_seat *seat = input_get_seat(input);
text_entry_deactivate(editor->entry, seat);
text_entry_deactivate(editor->editor, seat);
editor->active_entry = NULL;
}
static void
keyboard_focus_handler(struct window *window,
struct input *device, void *data)
{
struct editor *editor = data;
window_schedule_redraw(editor->window);
}
static int
handle_bound_key(struct editor *editor,
struct input *input, uint32_t sym, uint32_t time)
{
switch (sym) {
case XKB_KEY_X:
editor_copy_cut(editor, input, true);
return 1;
case XKB_KEY_C:
editor_copy_cut(editor, input, false);
return 1;
case XKB_KEY_V:
editor_paste(editor, input);
return 1;
default:
return 0;
}
}
static void
key_handler(struct window *window,
struct input *input, uint32_t time,
uint32_t key, uint32_t sym, enum wl_keyboard_key_state state,
void *data)
{
struct editor *editor = data;
struct text_entry *entry;
const char *new_char;
char text[16];
uint32_t modifiers;
if (!editor->active_entry)
return;
entry = editor->active_entry;
if (state != WL_KEYBOARD_KEY_STATE_PRESSED)
return;
modifiers = input_get_modifiers(input);
if ((modifiers & MOD_CONTROL_MASK) &&
(modifiers & MOD_SHIFT_MASK) &&
handle_bound_key(editor, input, sym, time))
return;
switch (sym) {
case XKB_KEY_BackSpace:
text_entry_commit_and_reset(entry);
new_char = utf8_prev_char(entry->text, entry->text + entry->cursor);
if (new_char != NULL)
text_entry_delete_text(entry,
new_char - entry->text,
(entry->text + entry->cursor) - new_char);
break;
case XKB_KEY_Delete:
text_entry_commit_and_reset(entry);
new_char = utf8_next_char(entry->text + entry->cursor);
if (new_char != NULL)
text_entry_delete_text(entry,
entry->cursor,
new_char - (entry->text + entry->cursor));
break;
case XKB_KEY_Left:
text_entry_commit_and_reset(entry);
new_char = utf8_prev_char(entry->text, entry->text + entry->cursor);
if (new_char != NULL) {
entry->cursor = new_char - entry->text;
if (!(input_get_modifiers(input) & MOD_SHIFT_MASK))
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
}
break;
case XKB_KEY_Right:
text_entry_commit_and_reset(entry);
new_char = utf8_next_char(entry->text + entry->cursor);
if (new_char != NULL) {
entry->cursor = new_char - entry->text;
if (!(input_get_modifiers(input) & MOD_SHIFT_MASK))
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
}
break;
case XKB_KEY_Up:
text_entry_commit_and_reset(entry);
move_up(entry->text, &entry->cursor);
if (!(input_get_modifiers(input) & MOD_SHIFT_MASK))
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
break;
case XKB_KEY_Down:
text_entry_commit_and_reset(entry);
move_down(entry->text, &entry->cursor);
if (!(input_get_modifiers(input) & MOD_SHIFT_MASK))
entry->anchor = entry->cursor;
widget_schedule_redraw(entry->widget);
break;
case XKB_KEY_Escape:
break;
default:
if (xkb_keysym_to_utf8(sym, text, sizeof(text)) <= 0)
break;
text_entry_commit_and_reset(entry);
text_entry_insert_at_cursor(entry, text, 0, 0);
break;
}
widget_schedule_redraw(entry->widget);
}
static void
global_handler(struct display *display, uint32_t name,
const char *interface, uint32_t version, void *data)
{
struct editor *editor = data;
if (!strcmp(interface, "zwp_text_input_manager_v1")) {
editor->text_input_manager =
display_bind(display, name,
&zwp_text_input_manager_v1_interface, 1);
}
}
int
main(int argc, char *argv[])
{
struct editor editor;
int i;
uint32_t click_to_show = 0;
const char *preferred_language = NULL;
for (i = 1; i < argc; i++) {
if (strcmp("--click-to-show", argv[i]) == 0)
click_to_show = 1;
else if (strcmp("--preferred-language", argv[i]) == 0 &&
i + 1 < argc) {
preferred_language = argv[i + 1];
i++;
} else {
printf("Usage: %s [OPTIONS]\n"
" --click-to-show\n"
" --preferred-language LANGUAGE\n",
argv[0]);
return 1;
}
}
memset(&editor, 0, sizeof editor);
#ifdef HAVE_PANGO
g_type_init();
#endif
editor.display = display_create(&argc, argv);
if (editor.display == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
display_set_user_data(editor.display, &editor);
display_set_global_handler(editor.display, global_handler);
if (editor.text_input_manager == NULL) {
fprintf(stderr, "No text input manager global\n");
return -1;
}
editor.window = window_create(editor.display);
editor.widget = window_frame_create(editor.window, &editor);
editor.entry = text_entry_create(&editor, "Entry");
editor.entry->click_to_show = click_to_show;
if (preferred_language)
editor.entry->preferred_language = strdup(preferred_language);
editor.editor = text_entry_create(&editor, "Numeric");
editor.editor->content_purpose = ZWP_TEXT_INPUT_V1_CONTENT_PURPOSE_NUMBER;
editor.editor->click_to_show = click_to_show;
editor.selection = NULL;
editor.selected_text = NULL;
window_set_title(editor.window, "Text Editor");
window_set_key_handler(editor.window, key_handler);
window_set_keyboard_focus_handler(editor.window,
keyboard_focus_handler);
window_set_user_data(editor.window, &editor);
widget_set_redraw_handler(editor.widget, redraw_handler);
widget_set_resize_handler(editor.widget, resize_handler);
widget_set_button_handler(editor.widget, editor_button_handler);
widget_set_touch_down_handler(editor.widget, editor_touch_handler);
window_schedule_resize(editor.window, 500, 400);
display_run(editor.display);
if (editor.selected_text)
free(editor.selected_text);
if (editor.selection)
wl_data_source_destroy(editor.selection);
text_entry_destroy(editor.entry);
text_entry_destroy(editor.editor);
widget_destroy(editor.widget);
window_destroy(editor.window);
display_destroy(editor.display);
return 0;
}