399 lines
9.3 KiB
C
399 lines
9.3 KiB
C
#include <Elementary.h>
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#include "elm_priv.h"
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/**
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* @defgroup Notepad Notepad
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*
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* The notepad is an object for quickly loading a text file, displaying it,
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* allowing editing of it and saving of changes back to the file loaded.
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*
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* Signals that you can add callbacks for are:
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*
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* NONE
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*
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* A notepad object contains a scroller and an entry. It is a convenience
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* widget that loads a text file indicated, puts it in the scrollable entry
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* and allows the user to edit it. Changes are written back to the original
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* file after a short delay. The file to load and save to is specified by
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* elm_notepad_file_set().
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*/
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typedef struct _Widget_Data Widget_Data;
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struct _Widget_Data
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{
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Evas_Object *scr, *entry;
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const char *file;
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Elm_Text_Format format;
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Ecore_Timer *delay_write;
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Eina_Bool can_write : 1;
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Eina_Bool autosave : 1;
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};
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static const char *widtype = NULL;
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static void _del_hook(Evas_Object *obj);
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static void _sizing_eval(Evas_Object *obj);
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static void _on_focus_hook(void *data, Evas_Object *obj);
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static void _load(Evas_Object *obj);
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static void _save(Evas_Object *obj);
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static void
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_del_hook(Evas_Object *obj)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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if (wd->file) eina_stringshare_del(wd->file);
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if (wd->delay_write)
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{
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ecore_timer_del(wd->delay_write);
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if (wd->autosave) _save(obj);
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}
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free(wd);
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}
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static void
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_sizing_eval(Evas_Object *obj)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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evas_object_size_hint_min_set(obj, -1, -1);
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evas_object_size_hint_max_set(obj, -1, -1);
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}
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static void
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_on_focus_hook(void *data __UNUSED__, Evas_Object *obj)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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if (elm_widget_focus_get(obj)) elm_widget_focus_steal(wd->entry);
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}
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static char *
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_buf_append(char *buf, const char *str, int *len, int *alloc)
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{
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int len2 = strlen(str);
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if ((*len + len2) >= *alloc)
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{
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char *buf2 = realloc(buf, *alloc + len2 + 512);
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if (!buf2) return NULL;
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buf = buf2;
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*alloc += (512 + len2);
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}
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strcpy(buf + *len, str);
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*len += len2;
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return buf;
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}
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static char *
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_load_file(const char *file)
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{
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FILE *f;
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size_t size;
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int alloc = 0, len = 0;
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char *text = NULL, buf[PATH_MAX];
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f = fopen(file, "rb");
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if (!f) return NULL;
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while ((size = fread(buf, 1, sizeof(buf), f)))
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{
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buf[size] = 0;
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text = _buf_append(text, buf, &len, &alloc);
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}
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fclose(f);
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return text;
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}
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static char *
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_load_plain(const char *file)
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{
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char *text;
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text = _load_file(file);
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if (text)
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{
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char *text2;
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text2 = elm_entry_utf8_to_markup(text);
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free(text);
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return text2;
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}
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return NULL;
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}
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static void
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_load(Evas_Object *obj)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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char *text;
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if (!wd) return;
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if (!wd->file)
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{
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elm_entry_entry_set(wd->entry, "");
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return;
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}
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switch (wd->format)
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{
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case ELM_TEXT_FORMAT_PLAIN_UTF8:
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text = _load_plain(wd->file);
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break;
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case ELM_TEXT_FORMAT_MARKUP_UTF8:
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text = _load_file(wd->file);
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break;
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default:
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text = NULL;
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break;
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}
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if (text)
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{
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elm_entry_entry_set(wd->entry, text);
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free(text);
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}
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else
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elm_entry_entry_set(wd->entry, "");
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}
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static void
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_save_markup_utf8(const char *file, const char *text)
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{
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FILE *f;
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if ((!text) || (text[0] == 0))
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{
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ecore_file_unlink(file);
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return;
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}
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f = fopen(file, "wb");
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if (!f)
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{
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// FIXME: report a write error
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return;
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}
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fputs(text, f); // FIXME: catch error
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fclose(f);
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}
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static void
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_save_plain_utf8(const char *file, const char *text)
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{
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char *text2;
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text2 = elm_entry_markup_to_utf8(text);
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if (text2)
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{
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_save_markup_utf8(file, text2);
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free(text2);
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}
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}
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static void
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_save(Evas_Object *obj)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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if (!wd->file) return;
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switch (wd->format)
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{
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case ELM_TEXT_FORMAT_PLAIN_UTF8:
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_save_plain_utf8(wd->file, elm_entry_entry_get(wd->entry));
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break;
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case ELM_TEXT_FORMAT_MARKUP_UTF8:
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_save_markup_utf8(wd->file, elm_entry_entry_get(wd->entry));
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break;
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default:
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break;
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}
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}
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static Eina_Bool
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_delay_write(void *data)
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{
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Widget_Data *wd = elm_widget_data_get(data);
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if (!wd) return ECORE_CALLBACK_CANCEL;
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_save(data);
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wd->delay_write = NULL;
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return ECORE_CALLBACK_CANCEL;
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}
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static void
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_entry_changed(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
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{
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Widget_Data *wd = elm_widget_data_get(data);
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if (!wd) return;
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if (wd->delay_write)
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{
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ecore_timer_del(wd->delay_write);
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wd->delay_write = NULL;
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}
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if (!wd->autosave) return;
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wd->delay_write = ecore_timer_add(2.0, _delay_write, data);
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}
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static void
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_hold_on(void *data __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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elm_widget_scroll_hold_push(wd->scr);
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}
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static void
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_hold_off(void *data __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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elm_widget_scroll_hold_pop(wd->scr);
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}
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static void
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_freeze_on(void *data __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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elm_widget_scroll_hold_push(wd->scr);
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}
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static void
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_freeze_off(void *data __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
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{
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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elm_widget_scroll_hold_pop(wd->scr);
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}
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/**
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* Add a new notepad to the parent
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*
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* @param parent The parent object
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* @return The new object or NULL if it cannot be created
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*
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* @ingroup Notepad
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*/
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EAPI Evas_Object *
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elm_notepad_add(Evas_Object *parent)
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{
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Evas_Object *obj;
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Evas *e;
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Widget_Data *wd;
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wd = ELM_NEW(Widget_Data);
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e = evas_object_evas_get(parent);
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obj = elm_widget_add(e);
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ELM_SET_WIDTYPE(widtype, "notepad");
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elm_widget_type_set(obj, "notepad");
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elm_widget_sub_object_add(parent, obj);
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elm_widget_on_focus_hook_set(obj, _on_focus_hook, NULL);
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elm_widget_data_set(obj, wd);
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elm_widget_del_hook_set(obj, _del_hook);
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elm_widget_can_focus_set(obj, EINA_TRUE);
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wd->scr = elm_scroller_add(parent);
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elm_widget_resize_object_set(obj, wd->scr);
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wd->entry = elm_entry_add(parent);
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evas_object_size_hint_weight_set(wd->entry, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
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evas_object_size_hint_align_set(wd->entry, EVAS_HINT_FILL, EVAS_HINT_FILL);
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elm_scroller_content_set(wd->scr, wd->entry);
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evas_object_show(wd->entry);
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elm_entry_entry_set(wd->entry, "");
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evas_object_smart_callback_add(wd->entry, "changed", _entry_changed, obj);
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evas_object_smart_callback_add(obj, "scroll-hold-on", _hold_on, obj);
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evas_object_smart_callback_add(obj, "scroll-hold-off", _hold_off, obj);
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evas_object_smart_callback_add(obj, "scroll-freeze-on", _freeze_on, obj);
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evas_object_smart_callback_add(obj, "scroll-freeze-off", _freeze_off, obj);
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wd->autosave = EINA_TRUE;
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_sizing_eval(obj);
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return obj;
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}
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/**
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* This sets the file (and implicitly loads it) for the text to display and
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* then edit. All changes are written back to the file after a short delay if
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* the notepad object is set to autosave.
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*
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* @param obj The notepad object
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* @param file The path to the file to load and save
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* @param format The file format
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*
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* @ingroup Notepad
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*/
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EAPI void
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elm_notepad_file_set(Evas_Object *obj, const char *file, Elm_Text_Format format)
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{
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ELM_CHECK_WIDTYPE(obj, widtype);
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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if (wd->delay_write)
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{
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ecore_timer_del(wd->delay_write);
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wd->delay_write = NULL;
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}
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if (wd->autosave) _save(obj);
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eina_stringshare_replace(&wd->file, file);
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wd->format = format;
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_load(obj);
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}
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/**
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* This function writes any changes made to the file.
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* All changes are written back to the file after a short delay.
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*
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* @param obj The notepad object
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* @param file The path to the file to save
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* @param format The file format
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*
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* @ingroup Notepad
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*/
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EAPI void
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elm_notepad_file_save(Evas_Object *obj, const char *file, Elm_Text_Format format)
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{
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ELM_CHECK_WIDTYPE(obj, widtype);
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Widget_Data *wd = elm_widget_data_get(obj);
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if ((!wd) || (!file)) return;
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if (wd->delay_write)
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{
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ecore_timer_del(wd->delay_write);
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wd->delay_write = NULL;
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}
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wd->format = format;
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eina_stringshare_replace(&wd->file, file);
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wd->delay_write = ecore_timer_add(2.0, _delay_write, obj);
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}
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/**
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* This will enable or disable the scroller bounce mode for the notepad. See
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* elm_scroller_bounce_set() for details
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*
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* @param obj The notepad object
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* @param h_bounce Allow bounce horizontally
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* @param v_bounce Allow bounce vertically
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*
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* @ingroup Notepad
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*/
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EAPI void
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elm_notepad_bounce_set(Evas_Object *obj, Eina_Bool h_bounce, Eina_Bool v_bounce)
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{
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ELM_CHECK_WIDTYPE(obj, widtype);
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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elm_scroller_bounce_set(wd->scr, h_bounce, v_bounce);
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}
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/**
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* This sets the notepad object to 'autosave' the loaded text file or not.
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*
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* @param obj The notepad object
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* @param autosave Autosave the loaded file or not
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*
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* @ingroup Notepad
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*/
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EAPI void
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elm_notepad_autosave_set(Evas_Object *obj, Eina_Bool autosave)
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{
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ELM_CHECK_WIDTYPE(obj, widtype);
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Widget_Data *wd = elm_widget_data_get(obj);
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if (!wd) return;
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wd->autosave = autosave;
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}
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