570 lines
13 KiB
C
570 lines
13 KiB
C
#include <justui/jwidget.h>
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#include <justui/jwidget-api.h>
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#include <justui/jfileselect.h>
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#include <gint/display.h>
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#include <gint/gint.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 <sys/stat.h>
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/* Type identifier for jfileselect */
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static int jfileselect_type_id = -1;
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/* Events */
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uint16_t JFILESELECT_LOADED;
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uint16_t JFILESELECT_VALIDATED;
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uint16_t JFILESELECT_CANCELED;
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/* We can try pretty hard to not duplicate the information held by the
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directory descriptor, which is already a full array of all entries on gint.
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However, the standard API behind readdir(3) does not allow us any complex
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operations; no filtering, no sorting, no accessing auxiliary data such as
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the file size. So we do this manually. */
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struct fileinfo {
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/* Entry name (owned by the structure) */
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char *name;
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/* File size in bytes if file, number of entries if folder */
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int size;
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/* Type from [struct dirent], -1 for the "Save As" entry */
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int type;
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};
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jfileselect *jfileselect_create(void *parent)
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{
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if(jfileselect_type_id < 0) return NULL;
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jfileselect *fs = malloc(sizeof *fs);
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if(!fs) return NULL;
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jwidget_init(&fs->widget, jfileselect_type_id, parent);
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jinput *input = jinput_create("Filename: ", 32, fs);
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if(!input) {
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free(fs);
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return NULL;
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}
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jwidget_set_floating(input, true);
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jwidget_set_visible(input, false);
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fs->path = NULL;
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fs->entries = NULL;
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fs->entry_count = 0;
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fs->selected_file = NULL;
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fs->saveas_input = input;
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fs->saveas = false;
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fs->input_mode = false;
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fs->filter_function = jfileselect_default_filter;
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fs->cursor = -1;
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fs->scroll = 0;
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fs->visible_lines = 0;
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#ifdef FX9860G
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fs->line_spacing = 1;
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fs->scrollbar_width = 1;
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#else
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fs->line_spacing = 4;
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fs->scrollbar_width = 2;
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#endif
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fs->font = dfont_default();
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fs->show_file_size = false;
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return fs;
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}
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static void count_visible_lines(jfileselect *fs)
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{
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int ch = jwidget_content_height(fs);
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int line_height = fs->font->line_height + fs->line_spacing;
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fs->visible_lines = ch / line_height;
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}
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static void set_finfo(jfileselect *fs, struct fileinfo *finfo, int n)
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{
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struct fileinfo *old = fs->entries;
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if(old) {
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for(int i = 0; i < fs->entry_count; i++)
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free(old[i].name);
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free(old);
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}
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fs->entries = finfo;
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fs->entry_count = n;
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}
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void jfileselect_set_saveas(jfileselect *fs, bool save_as)
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{
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fs->saveas = save_as;
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}
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//---
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// Input utilities
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//---
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static void start_input(jfileselect *fs)
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{
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fs->input_mode = true;
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jinput_clear(fs->saveas_input);
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jwidget_event(fs->saveas_input, (jevent){ .type = JWIDGET_FOCUS_IN });
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fs->widget.update = true;
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}
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static void stop_input(jfileselect *fs)
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{
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fs->input_mode = false;
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jwidget_event(fs->saveas_input, (jevent){ .type = JWIDGET_FOCUS_OUT });
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fs->widget.update = true;
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}
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//---
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// Getters and setters
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//---
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void jfileselect_set_font(jfileselect *fs, font_t const *font)
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{
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fs->font = font ? font : dfont_default();
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count_visible_lines(fs);
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}
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void jfileselect_set_line_spacing(jfileselect *fs, int line_spacing)
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{
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fs->line_spacing = line_spacing;
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count_visible_lines(fs);
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}
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void jfileselect_set_scrollbar_width(jfileselect *fs, int scrollbar_width)
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{
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fs->scrollbar_width = scrollbar_width;
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}
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void jfileselect_set_show_file_size(jfileselect *fs, bool show_file_size)
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{
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fs->show_file_size = show_file_size;
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fs->widget.update = true;
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}
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//---
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// Path and folder manipulation
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//---
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static char *path_down(char const *path, char const *name)
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{
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char *child = malloc(strlen(path) + strlen(name) + 2);
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if(!child)
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return NULL;
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strcpy(child, path);
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if(strcmp(path, "/") != 0)
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strcat(child, "/");
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strcat(child, name);
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return child;
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}
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static char *path_up(char const *path)
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{
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char *parent = strdup(path);
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if(!parent)
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return NULL;
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char *p = strrchr(parent, '/');
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if(p == parent)
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*(p+1) = 0;
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else if(p)
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*p = 0;
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return parent;
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}
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static int count_accepted_entries(jfileselect *fs, DIR *dp)
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{
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int n = 0;
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struct dirent *ent;
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rewinddir(dp);
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while((ent = readdir(dp)))
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n += (fs->filter_function ? fs->filter_function(ent) : 1);
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return n;
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}
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static int compare_entries(void const *i1_0, void const *i2_0)
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{
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struct fileinfo const *i1 = i1_0, *i2 = i2_0;
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/* Group directories first */
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int d1 = (i1->type == DT_DIR);
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int d2 = (i2->type == DT_DIR);
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if(d1 != d2)
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return d2 - d1;
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/* Then the "Save As" entry */
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int sa1 = (i1->type == -1);
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int sa2 = (i2->type == -1);
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if(sa1 != sa2)
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return sa2 - sa1;
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/* Then group by name */
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return strcmp(i1->name, i2->name);
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}
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static bool load_folder_switch(jfileselect *fs, char *path)
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{
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set_finfo(fs, NULL, 0);
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struct dirent *ent;
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DIR *dp = opendir(path);
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if(!dp)
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return false;
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/* Count entries */
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int n = count_accepted_entries(fs, dp) + fs->saveas;
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/* Allocate memory for the fileinfo structures */
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struct fileinfo *finfo = malloc(n * sizeof *finfo);
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if(!finfo) {
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closedir(dp);
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return false;
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}
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/* Read the fileinfo structures */
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rewinddir(dp);
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for(int i = 0; i < n && (ent = readdir(dp));) {
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if(fs->filter_function && !fs->filter_function(ent))
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continue;
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finfo[i].name = strdup(ent->d_name);
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finfo[i].type = ent->d_type;
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finfo[i].size = -1;
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if(!finfo[i].name) {
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/* Profesionnal unwinding isn't it? */
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for(int j = 0; j < i; j++) free(finfo[j].name);
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free(finfo);
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closedir(dp);
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return false;
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}
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char *full_path = path_down(path, ent->d_name);
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if(full_path) {
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if(ent->d_type == DT_DIR) {
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DIR *sub = opendir(full_path);
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if(sub) {
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finfo[i].size = count_accepted_entries(fs, sub);
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closedir(sub);
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}
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}
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else {
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struct stat st;
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if(stat(full_path, &st) >= 0)
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finfo[i].size = st.st_size;
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}
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}
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i++;
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}
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/* Add the saveas entry */
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if(fs->saveas) {
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finfo[n-1].name = strdup("<Create a new file here>");
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finfo[n-1].type = -1;
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finfo[n-1].size = -1;
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}
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qsort(finfo, n, sizeof *finfo, compare_entries);
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closedir(dp);
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free(fs->path);
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fs->path = path;
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set_finfo(fs, finfo, n);
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fs->widget.update = true;
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jwidget_emit(fs, (jevent){ .type = JFILESELECT_LOADED });
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return true;
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}
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static bool load_folder(jfileselect *fs, char *path)
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{
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return gint_world_switch(GINT_CALL(load_folder_switch, (void *)fs, path));
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}
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bool jfileselect_browse(jfileselect *fs, char const *path)
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{
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char *path_copy = strdup(path);
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if(!path_copy)
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return false;
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if(!load_folder(fs, path_copy))
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return false;
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free(fs->selected_file);
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fs->selected_file = NULL;
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fs->cursor = 0;
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fs->scroll = 0;
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stop_input(fs);
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return true;
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}
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char const *jfileselect_selected_file(jfileselect *fs)
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{
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return fs->selected_file;
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}
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char const *jfileselect_current_folder(jfileselect *fs)
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{
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return fs->path;
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}
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void jfileselect_set_filter(jfileselect *fs,
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bool (*filter)(struct dirent const *entry))
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{
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fs->filter_function = filter;
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}
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bool jfileselect_default_filter(struct dirent const *ent)
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{
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if(!strcmp(ent->d_name, "@MainMem"))
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return false;
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if(!strcmp(ent->d_name, "SAVE-F"))
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return false;
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if(!strcmp(ent->d_name, "."))
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return false;
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if(!strcmp(ent->d_name, ".."))
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return false;
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return true;
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}
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//---
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// Polymorphic widget operations
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//---
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static void jfileselect_poly_csize(void *fs0)
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{
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jfileselect *fs = fs0;
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jwidget *w = &fs->widget;
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w->w = 128;
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w->h = 3 * max(fs->font->line_height + fs->line_spacing, 0);
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}
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static void jfileselect_poly_layout(void *fs0)
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{
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jfileselect *fs = fs0;
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count_visible_lines(fs);
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fs->saveas_input->widget.w = jwidget_content_width(fs) - 4;
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}
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static void generate_info_string(char *str, bool isfolder, int size)
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{
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#ifdef FX9860G
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if(isfolder)
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sprintf(str, "%d/", size);
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else if(size < 10000) /* 10 kB */
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sprintf(str, "%d", size);
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else
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sprintf(str, "%dk", size / 1000);
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#else
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if(isfolder)
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sprintf(str, "%d entries", size);
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else
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sprintf(str, "%d B", size);
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#endif
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}
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static void jfileselect_poly_render(void *fs0, int x, int y)
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{
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jfileselect *fs = fs0;
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if(!fs->path || !fs->entries)
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return;
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font_t const *old_font = dfont(fs->font);
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int line_height = fs->font->line_height + fs->line_spacing;
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int cw = jwidget_content_width(fs) - 2 * fs->scrollbar_width;
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int ch = jwidget_content_height(fs);
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struct fileinfo *finfo = fs->entries;
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bool scrollbar =
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fs->entry_count > fs->visible_lines
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&& fs->scrollbar_width > 0;
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int entry_width = cw - (scrollbar ? 2 * fs->scrollbar_width : 0);
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for(int i = 0; i < fs->visible_lines && i < fs->entry_count; i++) {
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bool selected = (fs->cursor == fs->scroll + i);
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struct fileinfo *info = &finfo[fs->scroll + i];
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bool isfolder = (info->type == DT_DIR);
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/* Round `line_spacing / 2` down so there is more spacing below */
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int line_y = y + line_height * i;
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int text_y = line_y + (fs->line_spacing + 0) / 2;
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int fg = selected ? C_WHITE : C_BLACK;
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if(selected && fs->input_mode) {
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/* Little bit of a hack */
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fs->saveas_input->widget.visible = true;
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jwidget_render(fs->saveas_input, x+2, text_y);
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fs->saveas_input->widget.visible = false;
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continue;
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}
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if(selected) {
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drect(x, line_y, x + entry_width - 1, line_y + line_height - 1,
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C_BLACK);
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}
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dprint(x+2, text_y, fg, "%s%s", info->name, isfolder ? "/" : "");
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if(fs->show_file_size && info->size >= 0) {
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char str[32];
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generate_info_string(str, isfolder, info->size);
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dtext_opt(x + entry_width - 3, text_y, fg, C_NONE, DTEXT_RIGHT,
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DTEXT_TOP, str);
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}
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}
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if(scrollbar) {
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int sb_y = ch * fs->scroll / fs->entry_count;
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int sb_h = ch * fs->visible_lines / fs->entry_count;
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drect(x + cw - fs->scrollbar_width, y + sb_y,
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x + cw - 1, y + sb_y + sb_h - 1,
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C_BLACK);
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}
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dfont(old_font);
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}
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static bool jfileselect_poly_event(void *fs0, jevent e)
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{
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jfileselect *fs = fs0;
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if(!fs->path || !fs->entries)
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return false;
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if(e.type == JINPUT_CANCELED && e.source == fs->saveas_input) {
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stop_input(fs);
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return true;
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}
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else if(e.type == JINPUT_VALIDATED && e.source == fs->saveas_input) {
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stop_input(fs);
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fs->selected_file = path_down(fs->path,jinput_value(fs->saveas_input));
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if(fs->selected_file) {
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jwidget_emit(fs,(jevent){ .type = JFILESELECT_VALIDATED });
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return true;
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}
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else return false;
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}
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/* Send all events to the input when in input mode (without requiring
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access to the jscene to actually move the focus */
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else if(fs->input_mode) {
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bool b = jwidget_event(fs->saveas_input, e);
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if(b)
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fs->widget.update = true;
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/* We do capture all key events if not used by the input, so F-keys are
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disabled/etc */
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return b || e.type == JWIDGET_KEY;
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}
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if(e.type == JWIDGET_KEY) {
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key_event_t ev = e.key;
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if(ev.type != KEYEV_DOWN && ev.type != KEYEV_HOLD)
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return false;
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int key = ev.key;
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bool moved = false;
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if(key == KEY_UP && fs->cursor > 0) {
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fs->cursor = ev.shift ? 0 : fs->cursor - 1;
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moved = true;
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}
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if(key == KEY_DOWN && fs->cursor < fs->entry_count - 1) {
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fs->cursor = ev.shift ? fs->entry_count - 1 : fs->cursor + 1;
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moved = true;
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}
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if(fs->scroll > 0 && fs->cursor <= fs->scroll)
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fs->scroll = max(fs->cursor - 1, 0);
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if(fs->scroll + fs->visible_lines < fs->entry_count
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&& fs->cursor >= fs->scroll + fs->visible_lines - 2) {
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fs->scroll = min(fs->cursor - fs->visible_lines + 2,
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fs->entry_count - fs->visible_lines);
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}
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if(moved) {
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fs->widget.update = true;
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return true;
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}
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if(key == KEY_EXIT) {
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if(!strcmp(fs->path, "/")) {
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jwidget_emit(fs, (jevent){ .type = JFILESELECT_CANCELED });
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return true;
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}
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char *parent = path_up(fs->path);
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if(parent) {
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load_folder(fs, parent);
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fs->cursor = 0;
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fs->scroll = 0;
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return true;
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}
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}
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else if(key == KEY_EXE) {
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struct fileinfo *finfo = fs->entries;
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struct fileinfo *i = &finfo[fs->cursor];
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if(i->type == DT_DIR) {
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char *child = path_down(fs->path, i->name);
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if(child) {
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load_folder(fs, child);
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fs->cursor = 0;
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fs->scroll = 0;
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return true;
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}
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}
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else if(fs->saveas && i->type == -1) {
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start_input(fs);
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return true;
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}
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else {
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fs->selected_file = path_down(fs->path, i->name);
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if(fs->selected_file) {
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jwidget_emit(fs,(jevent){ .type = JFILESELECT_VALIDATED });
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return true;
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}
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}
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}
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}
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return false;
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}
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static void jfileselect_poly_destroy(void *fs0)
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{
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jfileselect *fs = fs0;
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|
|
free(fs->path);
|
|
set_finfo(fs, NULL, 0);
|
|
free(fs->selected_file);
|
|
}
|
|
|
|
/* jfileselect type definition */
|
|
static jwidget_poly type_jfileselect = {
|
|
.name = "jfileselect",
|
|
.csize = jfileselect_poly_csize,
|
|
.layout = jfileselect_poly_layout,
|
|
.render = jfileselect_poly_render,
|
|
.event = jfileselect_poly_event,
|
|
.destroy = jfileselect_poly_destroy,
|
|
};
|
|
|
|
__attribute__((constructor(1003)))
|
|
static void j_register_jfileselect(void)
|
|
{
|
|
jfileselect_type_id = j_register_widget(&type_jfileselect, "jwidget");
|
|
JFILESELECT_LOADED = j_register_event();
|
|
JFILESELECT_VALIDATED = j_register_event();
|
|
JFILESELECT_CANCELED = j_register_event();
|
|
}
|