clients/editor.c - weston - Git Browser for ODROID

 /*
  * 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;
 	char *text;
 	int active;
 	struct rectangle allocation;
 	struct text_model *model;
 };

 struct editor {
 	struct text_model_manager *text_model_manager;
 	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 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
 };

 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->text = strdup(text);
 	entry->active = 0;
 	entry->model = text_model_manager_create_text_model(editor->text_model_manager, 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)
 {
 	text_model_activate(entry->model);
 }

 static void
 text_entry_deactivate(struct text_entry *entry)
 {
 	text_model_deactivate(entry->model);
 }

 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;

 	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));

 	if (activate_entry) {
 		if (editor->editor->active)
 			text_entry_deactivate(editor->editor);
 		if (!editor->entry->active)
 			text_entry_activate(editor->entry);
 	} else if (activate_editor) {
 		if (editor->entry->active)
 			text_entry_deactivate(editor->entry);
 		if (!editor->editor->active)
 			text_entry_activate(editor->editor);
 	} else {
 		if (editor->entry->active)
 			text_entry_deactivate(editor->entry);
 		if (editor->editor->active)
 			text_entry_deactivate(editor->editor);
 	}
 	editor->entry->active = activate_entry;
 	editor->editor->active = activate_editor;
 	assert(!(editor->entry->active && editor->editor->active));

 	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_manager")) {
 		editor->text_model_manager = wl_display_bind(display, id,
 							     &text_model_manager_interface);
 	}
 }

 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;
 }
	/*
	* 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;
	char *text;
	int active;
	struct rectangle allocation;
	struct text_model *model;
	};

	struct editor {
	struct text_model_manager *text_model_manager;
	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 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
	};

	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->text = strdup(text);
	entry->active = 0;
	entry->model = text_model_manager_create_text_model(editor->text_model_manager, 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)
	{
	text_model_activate(entry->model);
	}

	static void
	text_entry_deactivate(struct text_entry *entry)
	{
	text_model_deactivate(entry->model);
	}

	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;

	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));

	if (activate_entry) {
	if (editor->editor->active)
	text_entry_deactivate(editor->editor);
	if (!editor->entry->active)
	text_entry_activate(editor->entry);
	} else if (activate_editor) {
	if (editor->entry->active)
	text_entry_deactivate(editor->entry);
	if (!editor->editor->active)
	text_entry_activate(editor->editor);
	} else {
	if (editor->entry->active)
	text_entry_deactivate(editor->entry);
	if (editor->editor->active)
	text_entry_deactivate(editor->editor);
	}
	editor->entry->active = activate_entry;
	editor->editor->active = activate_editor;
	assert(!(editor->entry->active && editor->editor->active));

	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_manager")) {
	editor->text_model_manager = wl_display_bind(display, id,
	&text_model_manager_interface);
	}
	}

	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;
	}