wmaker/WINGs/wfilepanel.c

#include "WINGsP.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <limits.h>
#include <errno.h>

#ifndef PATH_MAX
#define PATH_MAX 1024
#endif

#ifndef FLOPPY_PATH
#define FLOPPY_PATH "/floppy"
#endif

typedef struct W_FilePanel {
    WMWindow *win;
    
    WMLabel *iconLabel;
    WMLabel *titleLabel;
    
    WMFrame *line;

    WMLabel *nameLabel;
    WMBrowser *browser;
    
    WMButton *okButton;
    WMButton *cancelButton;
    
    WMButton *homeButton;
    WMButton *trashcanButton;
    WMButton *createDirButton;
    WMButton *disketteButton;
    WMButton *unmountButton;

    WMView *accessoryView;

    WMTextField *fileField;
    
    char **fileTypes;

    struct {
	unsigned int canExit:1;
	unsigned int canceled:1;       /* clicked on cancel */
	unsigned int done:1;
	unsigned int filtered:1;
	unsigned int canChooseFiles:1;
	unsigned int canChooseDirectories:1;
	unsigned int autoCompletion:1;
	unsigned int showAllFiles:1;
	unsigned int canFreeFileTypes:1;
	unsigned int fileMustExist:1;
	unsigned int panelType:1;
    } flags;
} W_FilePanel;


/* Type of panel */
#define WP_OPEN         0
#define WP_SAVE         1

#define PWIDTH		330
#define PHEIGHT 	360

static void listDirectoryOnColumn(WMFilePanel *panel, int column, char *path);
static void browserClick();
static void browserDClick();

static void fillColumn(WMBrowserDelegate *self, WMBrowser *bPtr, int column,
		       WMList *list);

static void deleteFile();

static void createDir();

static void goHome();

static void goFloppy();

static void goUnmount();

static void buttonClick();

static char *getCurrentFileName(WMFilePanel *panel);

static void handleEvents(XEvent *event, void *data);



static WMBrowserDelegate browserDelegate = {
    NULL, /* data */
	fillColumn, /* createRowsForColumn */
	NULL, /* titleOfColumn */
	NULL, /* didScroll */
	NULL  /* willScroll */
};


static int
closestListItem(WMList *list, char *text, Bool exact)
{
    WMListItem *item;
    WMBag *items = WMGetListItems(list);
    int i;
    int len = strlen(text);

    if (len==0)
	return -1;

    for (i = 0; i < WMGetBagItemCount(items); i++) {
	item = WMGetFromBag(items, i);

        if (strlen(item->text) >= len &&
            ((exact && strcmp(item->text, text)==0) ||
             (!exact && strncmp(item->text, text, len)==0))) {
	    return i;
	}
    }

    return -1;
}


static void
textChangedObserver(void *observerData, WMNotification *notification)
{
    W_FilePanel *panel = (W_FilePanel*)observerData;
    char *text;
    WMList *list;
    int col = WMGetBrowserNumberOfColumns(panel->browser) - 1;
    int i, textEvent;

    if (!(list = WMGetBrowserListInColumn(panel->browser, col)))
	return;

    text = WMGetTextFieldText(panel->fileField);
    textEvent = (int)WMGetNotificationClientData(notification);

    if (panel->flags.autoCompletion && textEvent!=WMDeleteTextEvent)
        i = closestListItem(list, text, False);
    else
        i = closestListItem(list, text, True);

    WMSelectListItem(list, i);
    if (i>=0 && panel->flags.autoCompletion) {
        WMListItem *item = WMGetListItem(list, i);
        int textLen = strlen(text), itemTextLen = strlen(item->text);
        int visibleItems = WMWidgetHeight(list)/WMGetListItemHeight(list);
	
        WMSetListPosition(list, i - visibleItems/2);
	
        if (textEvent!=WMDeleteTextEvent) {
            WMRange range;

	    WMInsertTextFieldText(panel->fileField, &item->text[textLen],
                                  textLen);
            /*WMSetTextFieldCursorPosition(panel->fileField, itemTextLen);*/
	    range.position = textLen;
	    range.count = itemTextLen - textLen;
	    WMSelectTextFieldRange(panel->fileField, range);
	}
    }

    wfree(text);
}


static void
textEditedObserver(void *observerData, WMNotification *notification)
{
    W_FilePanel *panel = (W_FilePanel*)observerData;

    if ((int)WMGetNotificationClientData(notification)==WMReturnTextMovement) {
	WMPerformButtonClick(panel->okButton);
    }
}



static WMFilePanel*
makeFilePanel(WMScreen *scrPtr, char *name, char *title)
{
    WMFilePanel *fPtr;
    WMFont *largeFont;
    
    fPtr = wmalloc(sizeof(WMFilePanel));
    memset(fPtr, 0, sizeof(WMFilePanel));

    fPtr->win = WMCreateWindowWithStyle(scrPtr, name, WMTitledWindowMask
					|WMResizableWindowMask);
    WMResizeWidget(fPtr->win, PWIDTH, PHEIGHT);
    WMSetWindowTitle(fPtr->win, "");

    WMCreateEventHandler(WMWidgetView(fPtr->win), StructureNotifyMask,
                         handleEvents, fPtr);
    WMSetWindowMinSize(fPtr->win, PWIDTH, PHEIGHT);


    fPtr->iconLabel = WMCreateLabel(fPtr->win);
    WMResizeWidget(fPtr->iconLabel, 64, 64);
    WMMoveWidget(fPtr->iconLabel, 0, 0);
    WMSetLabelImagePosition(fPtr->iconLabel, WIPImageOnly);
    WMSetLabelImage(fPtr->iconLabel, scrPtr->applicationIcon);
    
    fPtr->titleLabel = WMCreateLabel(fPtr->win);
    WMResizeWidget(fPtr->titleLabel, PWIDTH-64, 64);
    WMMoveWidget(fPtr->titleLabel, 64, 0);
    largeFont = WMBoldSystemFontOfSize(scrPtr, 24);
    WMSetLabelFont(fPtr->titleLabel, largeFont);
    WMReleaseFont(largeFont);
    WMSetLabelText(fPtr->titleLabel, title);
    
    fPtr->line = WMCreateFrame(fPtr->win);
    WMMoveWidget(fPtr->line, 0, 64);
    WMResizeWidget(fPtr->line, PWIDTH, 2);
    WMSetFrameRelief(fPtr->line, WRGroove);

    fPtr->browser = WMCreateBrowser(fPtr->win);
    WMSetBrowserDelegate(fPtr->browser, &browserDelegate);
    WMSetBrowserAction(fPtr->browser, browserClick, fPtr);
    WMSetBrowserDoubleAction(fPtr->browser, browserDClick, fPtr);
    WMMoveWidget(fPtr->browser, 7, 72);
    WMResizeWidget(fPtr->browser, PWIDTH-14,200);
    WMHangData(fPtr->browser, fPtr);

    fPtr->nameLabel = WMCreateLabel(fPtr->win);
    WMMoveWidget(fPtr->nameLabel, 7, 282);
    WMResizeWidget(fPtr->nameLabel, 55, 14);
    WMSetLabelText(fPtr->nameLabel, "Name:");
    
    fPtr->fileField = WMCreateTextField(fPtr->win);
    WMMoveWidget(fPtr->fileField, 60, 278);
    WMResizeWidget(fPtr->fileField, PWIDTH-60-10, 24);
    WMAddNotificationObserver(textEditedObserver, fPtr,
			      WMTextDidEndEditingNotification,
			      fPtr->fileField);
    WMAddNotificationObserver(textChangedObserver, fPtr,
			      WMTextDidChangeNotification,
			      fPtr->fileField);
    
    fPtr->okButton = WMCreateCommandButton(fPtr->win);
    WMMoveWidget(fPtr->okButton, 245, 325);
    WMResizeWidget(fPtr->okButton, 75, 28);
    WMSetButtonText(fPtr->okButton, "OK");
    WMSetButtonImage(fPtr->okButton, scrPtr->buttonArrow);
    WMSetButtonAltImage(fPtr->okButton, scrPtr->pushedButtonArrow);
    WMSetButtonImagePosition(fPtr->okButton, WIPRight);
    WMSetButtonAction(fPtr->okButton, buttonClick, fPtr);
    
    fPtr->cancelButton = WMCreateCommandButton(fPtr->win);
    WMMoveWidget(fPtr->cancelButton, 165, 325);
    WMResizeWidget(fPtr->cancelButton, 75, 28);
    WMSetButtonText(fPtr->cancelButton, "Cancel");
    WMSetButtonAction(fPtr->cancelButton, buttonClick, fPtr);

    fPtr->trashcanButton = WMCreateCommandButton(fPtr->win);
    WMMoveWidget(fPtr->trashcanButton, 7, 325);
    WMResizeWidget(fPtr->trashcanButton, 28, 28);
    WMSetButtonImagePosition(fPtr->trashcanButton, WIPImageOnly);
    WMSetButtonImage(fPtr->trashcanButton, scrPtr->trashcanIcon);
    WMSetButtonAltImage(fPtr->trashcanButton, scrPtr->altTrashcanIcon);
    WMSetButtonAction(fPtr->trashcanButton, deleteFile, fPtr);

    fPtr->createDirButton = WMCreateCommandButton(fPtr->win);
    WMMoveWidget(fPtr->createDirButton, 37, 325);
    WMResizeWidget(fPtr->createDirButton, 28, 28);
    WMSetButtonImagePosition(fPtr->createDirButton, WIPImageOnly);
    WMSetButtonImage(fPtr->createDirButton, scrPtr->createDirIcon);
    WMSetButtonAltImage(fPtr->createDirButton, scrPtr->altCreateDirIcon);
    WMSetButtonAction(fPtr->createDirButton, createDir, fPtr);

    fPtr->homeButton = WMCreateCommandButton(fPtr->win);
    WMMoveWidget(fPtr->homeButton, 67, 325);
    WMResizeWidget(fPtr->homeButton, 28, 28);
    WMSetButtonImagePosition(fPtr->homeButton, WIPImageOnly);
    WMSetButtonImage(fPtr->homeButton, scrPtr->homeIcon);
    WMSetButtonAltImage(fPtr->homeButton, scrPtr->altHomeIcon);
    WMSetButtonAction(fPtr->homeButton, goHome, fPtr);

    fPtr->disketteButton = WMCreateCommandButton(fPtr->win);
    WMMoveWidget(fPtr->disketteButton, 97, 325);
    WMResizeWidget(fPtr->disketteButton, 28, 28);
    WMSetButtonImagePosition(fPtr->disketteButton, WIPImageOnly);
    WMSetButtonImage(fPtr->disketteButton, scrPtr->disketteIcon);
    WMSetButtonAltImage(fPtr->disketteButton, scrPtr->altDisketteIcon);
    WMSetButtonAction(fPtr->disketteButton, goFloppy, fPtr);

    fPtr->unmountButton = WMCreateCommandButton(fPtr->win);
    WMMoveWidget(fPtr->unmountButton, 127, 325);
    WMResizeWidget(fPtr->unmountButton, 28, 28);
    WMSetButtonImagePosition(fPtr->unmountButton, WIPImageOnly);
    WMSetButtonImage(fPtr->unmountButton, scrPtr->unmountIcon);
    WMSetButtonAltImage(fPtr->unmountButton, scrPtr->altUnmountIcon);
    WMSetButtonAction(fPtr->unmountButton, goUnmount, fPtr);
    WMSetButtonEnabled(fPtr->unmountButton, False);


    WMRealizeWidget(fPtr->win);
    WMMapSubwidgets(fPtr->win);

    WMSetFocusToWidget(fPtr->fileField);
    WMSetTextFieldCursorPosition(fPtr->fileField, 0);

    WMLoadBrowserColumnZero(fPtr->browser);
    
    WMSetWindowInitialPosition(fPtr->win,
	       (scrPtr->rootView->size.width - WMWidgetWidth(fPtr->win))/2,
               (scrPtr->rootView->size.height - WMWidgetHeight(fPtr->win))/2);

    fPtr->flags.canChooseFiles = 1;
    fPtr->flags.canChooseDirectories = 1;
    fPtr->flags.autoCompletion = 1;

    return fPtr;
}


WMOpenPanel*
WMGetOpenPanel(WMScreen *scrPtr)
{
    WMFilePanel *panel;
    
    if (scrPtr->sharedOpenPanel)
	return scrPtr->sharedOpenPanel;

    panel = makeFilePanel(scrPtr, "openFilePanel", "Open");
    panel->flags.fileMustExist = 1;
    panel->flags.panelType = WP_OPEN;

    scrPtr->sharedOpenPanel = panel;

    return panel;
}


WMSavePanel*
WMGetSavePanel(WMScreen *scrPtr)
{
    WMFilePanel *panel;

    if (scrPtr->sharedSavePanel)
	return scrPtr->sharedSavePanel;

    panel = makeFilePanel(scrPtr, "saveFilePanel", "Save");
    panel->flags.fileMustExist = 0;
    panel->flags.panelType = WP_SAVE;

    scrPtr->sharedSavePanel = panel;

    return panel;
}


void
WMFreeFilePanel(WMFilePanel *panel)
{
    if (panel == WMWidgetScreen(panel->win)->sharedSavePanel) {
	WMWidgetScreen(panel->win)->sharedSavePanel = NULL;
    }
    if (panel == WMWidgetScreen(panel->win)->sharedOpenPanel) {
	WMWidgetScreen(panel->win)->sharedOpenPanel = NULL;
    }
    WMRemoveNotificationObserver(panel);
    WMUnmapWidget(panel->win);
    WMDestroyWidget(panel->win);
    wfree(panel);
}


int
WMRunModalFilePanelForDirectory(WMFilePanel *panel, WMWindow *owner,
                                char *path, char *name, char **fileTypes)
{
    WMScreen *scr = WMWidgetScreen(panel->win);
    XEvent event;

    if (name && !owner) {
        WMSetWindowTitle(panel->win, name);
    }

    WMChangePanelOwner(panel->win, owner);

    WMSetFilePanelDirectory(panel, path);

    panel->flags.done = 0;
    switch(panel->flags.panelType) {
    case WP_OPEN:
        if (fileTypes)
            panel->flags.filtered = 1;
        panel->fileTypes = fileTypes;
        if (name == NULL)
            name = "Open";
        break;
    case WP_SAVE:
        panel->fileTypes = NULL;
        panel->flags.filtered = 0;
        if (name == NULL)
            name = "Save";
        break;
    default:
        break;
    }

    WMSetLabelText(panel->titleLabel, name);

    scr->modalView = W_VIEW(panel->win);
    WMMapWidget(panel->win);

    scr->modal = 1;
    while (!panel->flags.done) {	
	WMNextEvent(scr->display, &event);
	WMHandleEvent(&event);
    }
    scr->modal = 0;

    /* Must withdraw window because the next time we map
     * it, it might have a different transient owner. 
     */
    WMCloseWindow(panel->win);

    return (panel->flags.canceled ? False : True);
}




void
WMSetFilePanelDirectory(WMFilePanel *panel, char *path)
{
    WMList *list;
    WMListItem *item;
    int col;
    char *rest;

    rest = WMSetBrowserPath(panel->browser, path);
    if (strcmp(path, "/")==0)
        rest = NULL;

    col = WMGetBrowserSelectedColumn(panel->browser);
    list = WMGetBrowserListInColumn(panel->browser, col);
    if (list && (item = WMGetListSelectedItem(list))) {
        if (item->isBranch) {
            WMSetTextFieldText(panel->fileField, rest);
        } else {
            WMSetTextFieldText(panel->fileField, item->text);
        }
    } else {
        WMSetTextFieldText(panel->fileField, rest);
    }
}

			
void
WMSetFilePanelCanChooseDirectories(WMFilePanel *panel, Bool flag)
{
    panel->flags.canChooseDirectories = flag;
}

void
WMSetFilePanelCanChooseFiles(WMFilePanel *panel, Bool flag)
{
    panel->flags.canChooseFiles = flag;
}


void
WMSetFilePanelAutoCompletion(WMFilePanel *panel, Bool flag)
{
    panel->flags.autoCompletion = flag;
}


char*
WMGetFilePanelFileName(WMFilePanel *panel)
{
    return getCurrentFileName(panel);
}


void
WMSetFilePanelAccessoryView(WMFilePanel *panel, WMView *view)
{
    WMView *v;

    panel->accessoryView = view;

    v = WMWidgetView(panel->win);

    W_ReparentView(view, v, 0, 0);

    W_MoveView(view, (v->size.width - v->size.width)/2, 300);
}


WMView*
WMGetFilePanelAccessoryView(WMFilePanel *panel)
{
    return panel->accessoryView;
}


static char*
get_name_from_path(char *path)
{
    int size;
    
    assert(path!=NULL);
        
    size = strlen(path);

    /* remove trailing / */
    while (size > 0 && path[size-1]=='/')
	size--;
    /* directory was root */
    if (size == 0)
	return wstrdup("/");

    while (size > 0 && path[size-1] != '/')
	size--;
    
    return wstrdup(&(path[size]));
}


static int
filterFileName(WMFilePanel *panel, char *file, Bool isDirectory)
{
    return True;
}


static void
listDirectoryOnColumn(WMFilePanel *panel, int column, char *path)
{
    WMBrowser *bPtr = panel->browser;
    struct dirent *dentry;
    DIR *dir;
    struct stat stat_buf;
    char pbuf[PATH_MAX+16];

    assert(column >= 0);
    assert(path != NULL);

    /* put directory name in the title */
    WMSetBrowserColumnTitle(bPtr, column, get_name_from_path(path));
    
    dir = opendir(path);
    
    if (!dir) {
#ifdef VERBOSE
	printf("WINGs: could not open directory %s\n", path);
#endif
	return;
    }

    /* list contents in the column */
    while ((dentry = readdir(dir))) {	       
	if (strcmp(dentry->d_name, ".")==0 ||
	    strcmp(dentry->d_name, "..")==0)
	    continue;

	strcpy(pbuf, path);
	if (strcmp(path, "/")!=0)
	    strcat(pbuf, "/");
	strcat(pbuf, dentry->d_name);

	if (stat(pbuf, &stat_buf)!=0) {
#ifdef VERBOSE
	    printf("WINGs: could not stat %s\n", pbuf);
#endif
	    continue;
	} else {
	    int isDirectory;

	    isDirectory = S_ISDIR(stat_buf.st_mode);
	    
	    if (filterFileName(panel, dentry->d_name, isDirectory))
		WMInsertBrowserItem(bPtr, column, -1, dentry->d_name, isDirectory);
	}
    }
    WMSortBrowserColumn(bPtr, column);

    closedir(dir);
}


static void
fillColumn(WMBrowserDelegate *self, WMBrowser *bPtr, int column, WMList *list)
{
    char *path;
    WMFilePanel *panel;
    
    if (column > 0) {
	path = WMGetBrowserPathToColumn(bPtr, column-1);
    } else {
	path = wstrdup("/");
    }

    panel = WMGetHangedData(bPtr);
    listDirectoryOnColumn(panel, column, path);
    wfree(path);
}


static void 
browserDClick(WMBrowser *bPtr, WMFilePanel *panel)
{
    WMPerformButtonClick(panel->okButton);
}

static void 
browserClick(WMBrowser *bPtr, WMFilePanel *panel)
{
    int col = WMGetBrowserSelectedColumn(bPtr);
    WMListItem *item = WMGetBrowserSelectedItemInColumn(bPtr, col);

    if (!item || item->isBranch)
	WMSetTextFieldText(panel->fileField, NULL);
    else {
	WMSetTextFieldText(panel->fileField, item->text);
    }
}


static void
showError(WMScreen *scr, WMWindow *owner, char *s, char *file)
{
    char *errStr;

    if (file) {
        errStr = wmalloc(strlen(file)+strlen(s));
        sprintf(errStr, s, file);
    } else {
        errStr = wstrdup(s);
    }
    WMRunAlertPanel(scr, owner, "Error", errStr, "OK", NULL, NULL);
    wfree(errStr);
}


static void
createDir(WMButton *bPre, WMFilePanel *panel)
{
    char *directory_name;
    char *directory;
    char *file;
    char *s;
    WMScreen *scr = WMWidgetScreen(panel->win);
    WMInputPanel *_panel;

    _panel = WMCreateInputPanel(scr, panel->win,
            "Create Directory", "Enter directory name", "", "OK", "Cancel");
    scr->modalView = W_VIEW(_panel->win);
    WMMapWidget(_panel->win);
    scr->modal = 1;
    while (!_panel->done || WMScreenPending(scr)) {
        XEvent event;
        WMNextEvent(scr->display, &event);
        WMHandleEvent(&event);
    }
    scr->modal = 0;

    if (_panel->result == WAPRDefault)
        directory_name = WMGetTextFieldText(_panel->text);
    else {
        WMDestroyInputPanel(_panel);
        return;
    }

    WMDestroyInputPanel(_panel);

    directory = getCurrentFileName(panel);
    {
        char *s = strrchr(directory,'/');
        if (s) s[1] = 0;
    }

    if (directory_name[0] == '/') {
        directory[0] = 0;
    } else {
        while ((s = strstr(directory,"//"))) {
            int i;
            for (i = 2;s[i] == '/';i++);
            strcpy(s, &s[i-1]);
        }
        if ((s = strrchr(directory, '/')) && !s[1]) s[0] = 0;
    }
    while ((s = strstr(directory_name,"//"))) {
        int i;
        for (i = 2;s[i] == '/';i++);
        strcpy(s, &s[i-1]);
    }
    if ((s = strrchr(directory_name, '/')) && !s[1]) s[0] = 0;

    file = wmalloc(strlen(directory_name)+strlen(directory)+1);
    sprintf(file, "%s/%s", directory, directory_name);
    while ((s = strstr(file,"//"))) {
        int i;
        for (i = 2;s[i] == '/';i++);
        strcpy(s, &s[i-1]);
    }

    if (mkdir(file,0xfff) != 0) {
        switch (errno) {
            case EACCES:
                showError(scr, panel->win, "Permission denied.", NULL);
                break;
            case EEXIST:
                showError(scr, panel->win, "'%s' already existes.", file);
                break;
            case ENOENT:
                showError(scr, panel->win, "Path does not exist.", NULL);
        }
    }
    else WMSetFilePanelDirectory(panel, file);

    wfree(directory_name);
    wfree(directory);
    wfree(file);

}

static void
deleteFile(WMButton *bPre, WMFilePanel *panel)
{
    char *file;
    char *buffer, *s;
    struct stat filestat;
    WMScreen *scr = WMWidgetScreen(panel->win);

    file = getCurrentFileName(panel);

    while ((s = strstr(file,"//"))) {
        int i;
        for (i = 2;s[i] == '/';i++);
        strcpy(s, &s[i-1]);
    }
    if (strlen(file) > 1 && (s = strrchr(file, '/')) && !s[1]) s[0] = 0;

    if (stat(file,&filestat)) {
        switch (errno) {
            case ENOENT:
                showError(scr, panel->win, "'%s' does not exist.", file);
                break;
            case EACCES:
                showError(scr, panel->win, "Permission denied.", NULL);
                break;
            case ENOMEM:
                showError(scr, panel->win,
                        "Insufficient memory available.", NULL);
                break;
            case EROFS:
                showError(scr, panel->win,
                        "'%s' is on a read-only filesystem.", file);
                break;
            default:
                showError(scr, panel->win, "Can not delete '%s'.", file);
        }
        wfree(file);
        return;
    } else if (S_ISDIR(filestat.st_mode)) {
        buffer = wmalloc(strlen(file)+20);
        sprintf(buffer,"Delete directory %s ?",file);
    } else {
        buffer = wmalloc(strlen(file)+15);
        sprintf(buffer,"Delete file %s ?",file);
    }

    if (!WMRunAlertPanel(WMWidgetScreen(panel->win), panel->win,
                "Warning", buffer, "OK", "Cancel", NULL)) {
        if (S_ISDIR(filestat.st_mode)) {
            if (rmdir(file) != 0) {
                switch (errno) {
                    case EACCES:
                        showError(scr, panel->win, "Permission denied.", NULL);
                        break;
                    case ENOENT:
                        showError(scr, panel->win, "Directory '%s' does not exist.", file);
                        break;
                    case ENOTEMPTY:
                        showError(scr, panel->win, "Directory '%s' is not empty.", file);
                        break;
                    case EBUSY:
                        showError(scr, panel->win, "Directory '%s' is busy.", file);
                        break;
                    default:
                        showError(scr, panel->win, "Can not delete '%s'.", file);
                }
            } else {
                char *s = strrchr(file,'/');
                if (s) s[0] = 0;
                WMSetFilePanelDirectory(panel, file);
            }
        } else if (remove(file) != 0) {
            switch (errno) {
                case EISDIR:
                    showError(scr, panel->win, "'%s' is a directory.", file);
                    break;
                case ENOENT:
                    showError(scr, panel->win, "'%s' does not exist.", file);
                    break;
                case EACCES:
                    showError(scr, panel->win, "Permission denied.", NULL);
                    break;
                case ENOMEM:
                    showError(scr, panel->win,
                            "Insufficient memory available.", NULL);
                    break;
                case EROFS:
                    showError(scr, panel->win,
                            "'%s' is on a read-only filesystem.", file);
                    break;
                default:
                    showError(scr, panel->win, "Can not delete '%s'.", file);
            }
        } else {
            char *s = strrchr(file,'/');
            if (s) s[1] = 0;
            WMSetFilePanelDirectory(panel, file);
        }
    }
    wfree(buffer);
    wfree(file);
}

static void
goUnmount(WMButton *bPtr, WMFilePanel *panel)
{
}


static void
goFloppy(WMButton *bPtr, WMFilePanel *panel)
{
    char *file;
    struct stat filestat;
    WMScreen *scr = WMWidgetScreen(panel->win);

    file = FLOPPY_PATH;
    if (stat(FLOPPY_PATH,&filestat)) {
        showError(scr, panel->win, "An error occured browsing '%s'.", file);
        return;
    } else if (!S_ISDIR(filestat.st_mode)) {
        showError(scr, panel->win, "'%s' is not a directory.", file);
        return;
    }
    
    WMSetFilePanelDirectory(panel, FLOPPY_PATH);
}


static void
goHome(WMButton *bPtr, WMFilePanel *panel)
{
    char *home;

    /* home is statically allocated. Don't free it! */
    home = wgethomedir();
    if (!home)
	return;
    
    WMSetFilePanelDirectory(panel, home);
}


static void 
handleEvents(XEvent *event, void *data)
{
    W_FilePanel *pPtr = (W_FilePanel*)data;
    W_View *view = WMWidgetView(pPtr->win);

    if (event->type == ConfigureNotify) {
        if (event->xconfigure.width != view->size.width
            || event->xconfigure.height != view->size.height) {
            unsigned int newWidth = event->xconfigure.width;
            unsigned int newHeight = event->xconfigure.height;
	    int newColumnCount;

            W_ResizeView(view, newWidth, newHeight);
            WMResizeWidget(pPtr->line, newWidth, 2);
            WMResizeWidget(pPtr->browser, newWidth-14,
                           newHeight-(PHEIGHT-200));
            WMResizeWidget(pPtr->fileField, newWidth-60-10, 24);
            WMMoveWidget(pPtr->nameLabel, 7, newHeight-(PHEIGHT-282));
            WMMoveWidget(pPtr->fileField, 60, newHeight-(PHEIGHT-278));
            WMMoveWidget(pPtr->okButton, newWidth-(PWIDTH-245),
                    newHeight-(PHEIGHT-325));
            WMMoveWidget(pPtr->cancelButton, newWidth-(PWIDTH-165),
                    newHeight-(PHEIGHT-325));

            WMMoveWidget(pPtr->trashcanButton, 7, newHeight-(PHEIGHT-325));
            WMMoveWidget(pPtr->createDirButton, 37, newHeight-(PHEIGHT-325));
            WMMoveWidget(pPtr->homeButton, 67, newHeight-(PHEIGHT-325));
            WMMoveWidget(pPtr->disketteButton, 97, newHeight-(PHEIGHT-325));
            WMMoveWidget(pPtr->unmountButton, 127, newHeight-(PHEIGHT-325));

	    newColumnCount = (newWidth - 14) / 140;
	    WMSetBrowserMaxVisibleColumns(pPtr->browser, newColumnCount);
        }
    }
}


static char*
getCurrentFileName(WMFilePanel *panel)
{
    char *path;
    char *file;
    char *tmp;
    int len;
    
    path = WMGetBrowserPath(panel->browser);
    
    len = strlen(path);
    if (path[len-1]=='/') {
	file = WMGetTextFieldText(panel->fileField);
	tmp = wmalloc(strlen(path)+strlen(file)+8);
        if (file[0]!='/') {
           strcpy(tmp, path);
           strcat(tmp, file);
        } else
           strcpy(tmp, file);

	wfree(file);
	wfree(path);
	return tmp;
    } else {
	return path;
    }
}



static Bool
validOpenFile(WMFilePanel *panel)
{
    WMListItem *item;
    int col, haveFile = 0;
    char *file = WMGetTextFieldText(panel->fileField);

    if (file[0] != '\0')
        haveFile = 1;
    wfree(file);

    col = WMGetBrowserSelectedColumn(panel->browser);
    item = WMGetBrowserSelectedItemInColumn(panel->browser, col);
    if (item) {
	if (item->isBranch && !panel->flags.canChooseDirectories && !haveFile)
	    return False;
	else if (!item->isBranch && !panel->flags.canChooseFiles)
            return False;
        else
            return True;
    } else {
        /* we compute for / here */
	if (!panel->flags.canChooseDirectories && !haveFile)
	    return False;
        else
            return True;
    }
    return True;
}



static void
buttonClick(WMButton *bPtr, WMFilePanel *panel)
{
    WMRange range;

    if (bPtr == panel->okButton) {
        if (!validOpenFile(panel))
            return;
	if (panel->flags.fileMustExist) {
	    char *file;
	    
	    file = getCurrentFileName(panel);
	    if (access(file, F_OK)!=0) {
		WMRunAlertPanel(WMWidgetScreen(panel->win), panel->win,
				"Error", "File does not exist.",
				"Ok", NULL, NULL);
		wfree(file);
		return;
	    }
	    wfree(file);
	}
	panel->flags.canceled = 0;
    } else
	panel->flags.canceled = 1;

    range.count = range.position = 0;
    WMSelectTextFieldRange(panel->fileField, range);
    panel->flags.done = 1;
}