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476 lines
11 KiB
476 lines
11 KiB
/*
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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 <assert.h>
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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 "text-client-protocol.h"
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static const char *font_name = "sans-serif";
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static int font_size = 14;
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struct text_layout {
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cairo_glyph_t *glyphs;
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int num_glyphs;
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cairo_text_cluster_t *clusters;
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int num_clusters;
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cairo_text_cluster_flags_t cluster_flags;
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cairo_scaled_font_t *font;
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};
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struct text_entry {
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struct widget *widget;
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struct window *window;
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char *text;
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int active;
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struct text_model *model;
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struct text_layout *layout;
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};
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struct editor {
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struct text_model_factory *text_model_factory;
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struct display *display;
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struct window *window;
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struct widget *widget;
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struct text_entry *entry;
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struct text_entry *editor;
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};
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static struct text_layout *
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text_layout_create(void)
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{
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struct text_layout *layout;
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cairo_surface_t *surface;
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cairo_t *cr;
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layout = malloc(sizeof *layout);
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if (!layout)
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return NULL;
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layout->glyphs = NULL;
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layout->num_glyphs = 0;
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layout->clusters = NULL;
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layout->num_clusters = 0;
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surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 0, 0);
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cr = cairo_create(surface);
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cairo_set_font_size(cr, font_size);
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cairo_select_font_face(cr, font_name, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
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layout->font = cairo_get_scaled_font(cr);
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cairo_scaled_font_reference(layout->font);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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return layout;
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}
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static void
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text_layout_destroy(struct text_layout *layout)
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{
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if (layout->glyphs)
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cairo_glyph_free(layout->glyphs);
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if (layout->clusters)
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cairo_text_cluster_free(layout->clusters);
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cairo_scaled_font_destroy(layout->font);
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free(layout);
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}
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static void
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text_layout_set_text(struct text_layout *layout,
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const char *text)
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{
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if (layout->glyphs)
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cairo_glyph_free(layout->glyphs);
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if (layout->clusters)
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cairo_text_cluster_free(layout->clusters);
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layout->glyphs = NULL;
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layout->num_glyphs = 0;
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layout->clusters = NULL;
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layout->num_clusters = 0;
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cairo_scaled_font_text_to_glyphs(layout->font, 0, 0, text, -1,
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&layout->glyphs, &layout->num_glyphs,
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&layout->clusters, &layout->num_clusters,
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&layout->cluster_flags);
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}
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static void
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text_layout_draw(struct text_layout *layout, cairo_t *cr)
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{
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cairo_save(cr);
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cairo_set_scaled_font(cr, layout->font);
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cairo_show_glyphs(cr, layout->glyphs, layout->num_glyphs);
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cairo_restore(cr);
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}
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static void text_entry_redraw_handler(struct widget *widget, void *data);
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static void text_entry_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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static void
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text_entry_append(struct text_entry *entry, const char *text)
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{
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entry->text = realloc(entry->text, strlen(entry->text) + strlen(text) + 1);
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strcat(entry->text, text);
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text_layout_set_text(entry->layout, entry->text);
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}
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static void
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text_model_commit_string(void *data,
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struct text_model *text_model,
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const char *text,
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uint32_t index)
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{
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struct text_entry *entry = data;
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text_entry_append(entry, text);
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widget_schedule_redraw(entry->widget);
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}
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static void
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text_model_preedit_string(void *data,
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struct text_model *text_model,
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const char *text,
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uint32_t index)
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{
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}
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static void
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text_model_preedit_styling(void *data,
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struct text_model *text_model)
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{
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}
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static void
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text_model_key(void *data,
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struct text_model *text_model)
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{
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}
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static void
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text_model_selection_replacement(void *data,
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struct text_model *text_model)
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{
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}
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static void
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text_model_direction(void *data,
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struct text_model *text_model)
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{
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}
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static void
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text_model_locale(void *data,
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struct text_model *text_model)
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{
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}
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static void
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text_model_activated(void *data,
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struct text_model *text_model)
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{
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struct text_entry *entry = data;
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entry->active = 1;
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widget_schedule_redraw(entry->widget);
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}
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static void
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text_model_deactivated(void *data,
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struct text_model *text_model)
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{
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struct text_entry *entry = data;
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entry->active = 0;
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widget_schedule_redraw(entry->widget);
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}
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static const struct text_model_listener text_model_listener = {
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text_model_commit_string,
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text_model_preedit_string,
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text_model_preedit_styling,
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text_model_key,
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text_model_selection_replacement,
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text_model_direction,
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text_model_locale,
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text_model_activated,
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text_model_deactivated
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};
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static struct text_entry*
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text_entry_create(struct editor *editor, const char *text)
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{
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struct text_entry *entry;
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entry = malloc(sizeof *entry);
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entry->widget = widget_add_widget(editor->widget, entry);
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entry->window = editor->window;
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entry->text = strdup(text);
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entry->active = 0;
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entry->model = text_model_factory_create_text_model(editor->text_model_factory);
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text_model_add_listener(entry->model, &text_model_listener, entry);
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entry->layout = text_layout_create();
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text_layout_set_text(entry->layout, entry->text);
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widget_set_redraw_handler(entry->widget, text_entry_redraw_handler);
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widget_set_button_handler(entry->widget, text_entry_button_handler);
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return entry;
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}
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static void
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text_entry_destroy(struct text_entry *entry)
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{
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widget_destroy(entry->widget);
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text_model_destroy(entry->model);
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text_layout_destroy(entry->layout);
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free(entry->text);
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free(entry);
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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 editor *editor = 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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surface = window_get_surface(editor->window);
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widget_get_allocation(editor->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_translate(cr, allocation.x, allocation.y);
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/* Draw background */
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cairo_push_group(cr);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_rgba(cr, 1, 1, 1, 1);
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cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
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cairo_fill(cr);
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cairo_pop_group_to_source(cr);
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cairo_paint(cr);
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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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text_entry_allocate(struct text_entry *entry, int32_t x, int32_t y,
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int32_t width, int32_t height)
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{
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widget_set_allocation(entry->widget, x, y, width, height);
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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 editor *editor = data;
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struct rectangle allocation;
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widget_get_allocation(editor->widget, &allocation);
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text_entry_allocate(editor->entry,
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allocation.x + 20, allocation.y + 20,
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width - 40, height / 2 - 40);
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text_entry_allocate(editor->editor,
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allocation.x + 20, allocation.y + height / 2 + 20,
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width - 40, height / 2 - 40);
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}
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static void
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text_entry_activate(struct text_entry *entry,
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struct wl_seat *seat)
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{
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struct wl_surface *surface = window_get_wl_surface(entry->window);
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text_model_activate(entry->model,
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seat,
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surface);
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}
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static void
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text_entry_deactivate(struct text_entry *entry,
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struct wl_seat *seat)
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{
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text_model_deactivate(entry->model,
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seat);
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}
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static void
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text_entry_redraw_handler(struct widget *widget, void *data)
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{
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struct text_entry *entry = 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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surface = window_get_surface(entry->window);
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widget_get_allocation(entry->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_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_push_group(cr);
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cairo_translate(cr, allocation.x, allocation.y);
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cairo_set_source_rgba(cr, 1, 1, 1, 1);
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cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
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cairo_fill(cr);
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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if (entry->active) {
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cairo_rectangle(cr, 0, 0, allocation.width, allocation.height);
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cairo_set_line_width (cr, 3);
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cairo_set_source_rgba(cr, 0, 0, 1, 1.0);
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cairo_stroke(cr);
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}
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cairo_set_source_rgba(cr, 0, 0, 0, 1);
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cairo_translate(cr, 10, allocation.height / 2);
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text_layout_draw(entry->layout, cr);
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cairo_pop_group_to_source(cr);
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cairo_paint(cr);
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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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text_entry_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 text_entry *entry = data;
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if (button != BTN_LEFT) {
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return;
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}
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if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
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struct wl_seat *seat = input_get_seat(input);
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text_entry_activate(entry, seat);
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}
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}
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static void
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editor_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 editor *editor = data;
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if (button != BTN_LEFT) {
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return;
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}
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if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
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struct wl_seat *seat = input_get_seat(input);
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text_entry_deactivate(editor->entry, seat);
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text_entry_deactivate(editor->editor, seat);
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}
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}
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static void
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global_handler(struct wl_display *display, uint32_t id,
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const char *interface, uint32_t version, void *data)
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{
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struct editor *editor = data;
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if (!strcmp(interface, "text_model_factory")) {
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editor->text_model_factory = wl_display_bind(display, id,
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&text_model_factory_interface);
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}
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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 editor editor;
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editor.display = display_create(argc, argv);
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if (editor.display == NULL) {
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fprintf(stderr, "failed to create display: %m\n");
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return -1;
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}
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wl_display_add_global_listener(display_get_display(editor.display),
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global_handler, &editor);
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editor.window = window_create(editor.display);
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editor.widget = frame_create(editor.window, &editor);
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editor.entry = text_entry_create(&editor, "Entry");
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editor.editor = text_entry_create(&editor, "Editor");
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window_set_title(editor.window, "Text Editor");
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widget_set_redraw_handler(editor.widget, redraw_handler);
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widget_set_resize_handler(editor.widget, resize_handler);
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widget_set_button_handler(editor.widget, editor_button_handler);
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window_schedule_resize(editor.window, 500, 400);
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display_run(editor.display);
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text_entry_destroy(editor.entry);
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text_entry_destroy(editor.editor);
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return 0;
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}
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