491 lines
14 KiB
C++
491 lines
14 KiB
C++
//
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// Fl_File_Browser routines.
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//
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// Copyright 1999-2010 by Michael Sweet.
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// Copyright 2016 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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// Contents:
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//
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// Fl_File_Browser::full_height() - Return the height of the list.
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// Fl_File_Browser::item_height() - Return the height of a list item.
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// Fl_File_Browser::item_width() - Return the width of a list item.
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// Fl_File_Browser::item_draw() - Draw a list item.
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// Fl_File_Browser::Fl_File_Browser() - Create a Fl_File_Browser widget.
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// Fl_File_Browser::load() - Load a directory into the browser.
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// Fl_File_Browser::filter() - Set the filename filter.
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//
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//
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// Include necessary header files...
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//
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#include <FL/Fl_File_Browser.H>
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#include <FL/Fl.H>
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#include "Fl_System_Driver.H"
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#include <FL/fl_draw.H>
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#include <FL/filename.H>
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#include <FL/fl_string_functions.h>
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#include <FL/Fl_Image.H> // icon
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#include <stdio.h>
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#include <stdlib.h>
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#include "flstring.h"
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//
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// FL_BLINE definition from "Fl_Browser.cxx"...
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//
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#define SELECTED 1
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#define NOTDISPLAYED 2
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// TODO -- Warning: The definition of FL_BLINE here is a hack.
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// Fl_File_Browser should not do this. PLEASE FIX.
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// FL_BLINE should be private to Fl_Browser, and not re-defined here.
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// For now, make sure this struct is precisely consistent with Fl_Browser.cxx.
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//
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struct FL_BLINE // data is in a linked list of these
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{
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FL_BLINE *prev; // Previous item in list
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FL_BLINE *next; // Next item in list
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void *data; // Pointer to data (function)
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Fl_Image *icon; // Pointer to optional icon
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short length; // sizeof(txt)-1, may be longer than string
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char flags; // selected, displayed
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char txt[1]; // start of allocated array
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};
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//
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// 'Fl_File_Browser::full_height()' - Return the height of the list.
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//
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int // O - Height in pixels
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Fl_File_Browser::full_height() const
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{
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int i, // Looping var
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th; // Total height of list.
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for (i = 0, th = 0; i < size(); i ++)
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th += item_height(find_line(i)) + linespacing();
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return (th);
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}
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//
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// 'Fl_File_Browser::item_height()' - Return the height of a list item.
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//
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int // O - Height in pixels
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Fl_File_Browser::item_height(void *p) const // I - List item data
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{
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FL_BLINE *line; // Pointer to line
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char *t; // Pointer into text
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int height; // Width of line
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int textheight; // Height of text
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// Figure out the standard text height...
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fl_font(textfont(), textsize());
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textheight = fl_height();
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// We always have at least 1 line...
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height = textheight;
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// Scan for newlines...
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line = (FL_BLINE *)p;
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if (line != NULL)
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for (t = line->txt; *t != '\0'; t ++)
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if (*t == '\n')
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height += textheight;
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// If we have enabled icons then add space for them...
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if (Fl_File_Icon::first() != NULL && height < iconsize_)
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height = iconsize_;
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// Add space for the selection border..
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height += 2;
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// Return the height
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return (height);
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}
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//
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// 'Fl_File_Browser::item_width()' - Return the width of a list item.
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//
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int // O - Width in pixels
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Fl_File_Browser::item_width(void *p) const // I - List item data
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{
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int i; // Looping var
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FL_BLINE *line; // Pointer to line
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char *t, // Pointer into text
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*ptr, // Pointer into fragment
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fragment[10240]; // Fragment of text
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int width, // Width of line
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tempwidth; // Width of fragment
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int column; // Current column
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const int *columns; // Columns
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// Scan for newlines...
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line = (FL_BLINE *)p;
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columns = column_widths();
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// Set the font and size...
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if (line->txt[strlen(line->txt) - 1] == '/')
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fl_font(textfont() | FL_BOLD, textsize());
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else
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fl_font(textfont(), textsize());
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if (strchr(line->txt, '\n') == NULL &&
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strchr(line->txt, column_char()) == NULL)
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{
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// Do a fast width calculation...
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width = (int)fl_width(line->txt);
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}
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else
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{
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// More than 1 line or have columns; find the maximum width...
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width = 0;
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tempwidth = 0;
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column = 0;
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for (t = line->txt, ptr = fragment; *t != '\0'; t ++)
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if (*t == '\n')
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{
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// Newline - nul terminate this fragment and get the width...
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*ptr = '\0';
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tempwidth += (int)fl_width(fragment);
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// Update the max width as needed...
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if (tempwidth > width)
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width = tempwidth;
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// Point back to the start of the fragment...
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ptr = fragment;
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tempwidth = 0;
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column = 0;
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}
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else if (*t == column_char())
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{
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// Advance to the next column...
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column ++;
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if (columns)
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{
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for (i = 0, tempwidth = 0; i < column && columns[i]; i ++)
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tempwidth += columns[i];
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}
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else
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tempwidth = column * (int)(fl_height() * 0.6 * 8.0);
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if (tempwidth > width)
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width = tempwidth;
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ptr = fragment;
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}
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else
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*ptr++ = *t;
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if (ptr > fragment)
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{
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// Nul terminate this fragment and get the width...
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*ptr = '\0';
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tempwidth += (int)fl_width(fragment);
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// Update the max width as needed...
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if (tempwidth > width)
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width = tempwidth;
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}
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}
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// If we have enabled icons then add space for them...
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if (Fl_File_Icon::first() != NULL)
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width += iconsize_ + 8;
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// Add space for the selection border..
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width += 2;
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// Return the width
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return (width);
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}
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//
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// 'Fl_File_Browser::item_draw()' - Draw a list item.
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//
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void
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Fl_File_Browser::item_draw(void *p, // I - List item data
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int X, // I - Upper-lefthand X coordinate
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int Y, // I - Upper-lefthand Y coordinate
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int W, // I - Width of item
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int H) const// I - Height of item
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{
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int i; // Looping var
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FL_BLINE *line; // Pointer to line
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Fl_Color c; // Text color
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char *t, // Pointer into text
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*ptr, // Pointer into fragment
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fragment[10240]; // Fragment of text
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int width, // Width of line
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height; // Height of line
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int column; // Current column
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const int *columns; // Columns
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// Draw the list item text...
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line = (FL_BLINE *)p;
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if (line->txt[strlen(line->txt) - 1] == '/')
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fl_font(textfont() | FL_BOLD, textsize());
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else
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fl_font(textfont(), textsize());
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if (line->flags & SELECTED)
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c = fl_contrast(textcolor(), selection_color());
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else
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c = textcolor();
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if (Fl_File_Icon::first() == NULL)
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{
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// No icons, just draw the text...
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X ++;
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W -= 2;
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}
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else
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{
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// Draw the icon if it is set...
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if (line->data)
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((Fl_File_Icon *)line->data)->draw(X, Y + (H - iconsize_) / 2,
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iconsize_, iconsize_,
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(line->flags & SELECTED) ? FL_YELLOW :
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FL_LIGHT2,
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active_r());
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// Draw the text offset to the right...
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X += iconsize_ + 9;
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W -= iconsize_ - 10;
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}
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// Center the text vertically...
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height = fl_height();
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for (t = line->txt; *t != '\0'; t ++)
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if (*t == '\n')
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height += fl_height();
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Y += (H - height) / 2;
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// Draw the text...
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line = (FL_BLINE *)p;
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columns = column_widths();
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width = 0;
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column = 0;
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if (active_r())
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fl_color(c);
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else
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fl_color(fl_inactive(c));
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for (t = line->txt, ptr = fragment; *t != '\0'; t ++) {
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if (*t == '\n') {
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// Newline - nul terminate this fragment and draw it...
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*ptr = '\0';
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fl_draw(fragment, X + width, Y, W - width, fl_height(),
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(Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_CLIP), 0, 0);
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// Point back to the start of the fragment...
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ptr = fragment;
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width = 0;
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Y += fl_height();
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column = 0;
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} else if (*t == column_char()) {
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// Tab - nul terminate this fragment and draw it...
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*ptr = '\0';
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int cW = W - width; // Clip width...
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if (columns) {
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// Try clipping inside this column...
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for (i = 0; i < column && columns[i]; i ++) { ; }
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if (columns[i])
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cW = columns[i];
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}
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fl_draw(fragment, X + width, Y, cW, fl_height(),
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(Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_CLIP), 0, 0);
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// Advance to the next column...
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column ++;
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if (columns) {
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for (i = 0, width = 0; i < column && columns[i]; i ++)
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width += columns[i];
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}
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else
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width = column * (int)(fl_height() * 0.6 * 8.0);
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ptr = fragment;
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}
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else
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*ptr++ = *t;
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}
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if (ptr > fragment) {
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// Nul terminate this fragment and draw it...
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*ptr = '\0';
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fl_draw(fragment, X + width, Y, W - width, fl_height(),
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(Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_CLIP), 0, 0);
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}
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}
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/**
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The constructor creates the Fl_File_Browser widget at the specified position and size.
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The destructor destroys the widget and frees all memory that has been allocated.
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*/
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Fl_File_Browser::Fl_File_Browser(int X, // I - Upper-lefthand X coordinate
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int Y, // I - Upper-lefthand Y coordinate
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int W, // I - Width in pixels
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int H, // I - Height in pixels
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const char *l) // I - Label text
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: Fl_Browser(X, Y, W, H, l)
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{
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// Initialize the filter pattern, current directory, and icon size...
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pattern_ = "*";
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directory_ = "";
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iconsize_ = (uchar)(3 * textsize() / 2);
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filetype_ = FILES;
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errmsg_ = NULL;
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}
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// DTOR
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Fl_File_Browser::~Fl_File_Browser() {
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errmsg(NULL); // free()s prev errmsg, if any
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}
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/**
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Sets OS error message to a string, which can be NULL.
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Frees previous if any.
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void errmsg(const char *emsg);
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*/
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void Fl_File_Browser::errmsg(const char* emsg) {
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if ( errmsg_ ) { free((void*)errmsg_); errmsg_ = NULL; }
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errmsg_ = emsg ? fl_strdup(emsg) : NULL;
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}
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/**
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Loads the specified directory into the browser. If icons have been
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loaded then the correct icon is associated with each file in the list.
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If directory is "", all mount points (unix) or drive letters (Windows)
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are listed.
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The sort argument specifies a sort function to be used with
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fl_filename_list().
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Return value is the number of filename entries, or 0 if none.
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On error, 0 is returned, and errmsg() has OS error string if non-NULL.
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*/
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int // O - Number of files loaded
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Fl_File_Browser::load(const char *directory,// I - Directory to load
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Fl_File_Sort_F *sort) // I - Sort function to use
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{
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int i; // Looping var
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int num_files; // Number of files in directory
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int num_dirs; // Number of directories in list
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char filename[4096]; // Current file
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Fl_File_Icon *icon; // Icon to use
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errmsg(NULL); // clear errors first
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// printf("Fl_File_Browser::load(\"%s\")\n", directory);
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clear();
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directory_ = directory;
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if (!directory) {
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errmsg("NULL directory specified");
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return 0;
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}
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if (directory_[0] == '\0') {
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//
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// No directory specified; for UNIX list all mount points. For DOS
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// list all valid drive letters...
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//
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if ((icon = Fl_File_Icon::find("any", Fl_File_Icon::DEVICE)) == NULL)
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icon = Fl_File_Icon::find("any", Fl_File_Icon::DIRECTORY);
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num_files = Fl::system_driver()->file_browser_load_filesystem(this, filename, (int)sizeof(filename), icon);
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} else {
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dirent **files; // Files in in directory
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char emsg[1024] = "";
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// Build the file list, check for errors
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num_files = Fl::system_driver()->file_browser_load_directory(directory_,
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filename, sizeof(filename),
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&files, sort,
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emsg, sizeof(emsg));
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// printf("Fl_File_Browser::load(dir='%s',filename='%s'): failed, emsg='%s'\n", directory_, filename, emsg);
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if (num_files <= 0) {
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errmsg(emsg);
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return 0;
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}
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for (i = 0, num_dirs = 0; i < num_files; i ++) {
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if (strcmp(files[i]->d_name, "./")) {
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fl_snprintf(filename, sizeof(filename), "%s/%s", directory_, files[i]->d_name);
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icon = Fl_File_Icon::find(filename);
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if ((icon && icon->type() == Fl_File_Icon::DIRECTORY) ||
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Fl::system_driver()->filename_isdir_quick(filename)) {
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num_dirs ++;
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insert(num_dirs, files[i]->d_name, icon);
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} else if (filetype_ == FILES &&
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fl_filename_match(files[i]->d_name, pattern_)) {
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add(files[i]->d_name, icon);
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}
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}
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free(files[i]);
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}
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free(files);
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}
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return (num_files);
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}
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//
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// 'Fl_File_Browser::filter()' - Set the filename filter.
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//
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void
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Fl_File_Browser::filter(const char *pattern) // I - Pattern string
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{
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// If pattern is NULL set the pattern to "*"...
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if (pattern)
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pattern_ = pattern;
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else
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pattern_ = "*";
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}
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