724 lines
22 KiB
C
724 lines
22 KiB
C
// progman.c — Program Manager application for DVX Shell
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//
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// Displays a grid of available apps from the apps/ directory.
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// Double-click or Enter launches an app. Includes Task Manager (Ctrl+Esc).
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//
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// DXE App Contract:
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// This is a callback-only DXE app (hasMainLoop = false). It exports two
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// symbols: appDescriptor (metadata) and appMain (entry point). The shell
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// calls appMain once; we create windows, register callbacks, and return 0.
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// From that point on, the shell's event loop drives everything through
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// our window callbacks (onClose, onMenu, widget onClick, etc.).
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//
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// Because we have no main loop, we don't need a dedicated task stack.
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// The shell runs our callbacks in task 0 during dvxUpdate().
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//
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// Progman is special: it's the desktop app. It calls
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// shellRegisterDesktopUpdate() so the shell notifies us whenever an app
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// is loaded, reaped, or crashes, keeping our status bar and Task Manager
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// list current without polling.
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#include "dvxApp.h"
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#include "dvxDialog.h"
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#include "dvxWidget.h"
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#include "dvxWm.h"
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#include "shellApp.h"
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#include "shellInfo.h"
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <dirent.h>
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#include <sys/stat.h>
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// ============================================================
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// Constants
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// ============================================================
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// 64 entries is generous; limited by screen real estate before this cap
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#define MAX_APP_FILES 64
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// DOS 8.3 paths are short, but long names under DJGPP can reach ~260
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#define MAX_PATH_LEN 260
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// Grid layout for app buttons: 4 columns, rows created dynamically
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#define PM_GRID_COLS 4
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#define PM_BTN_W 100
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#define PM_BTN_H 24
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// Menu command IDs
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#define CMD_RUN 100
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#define CMD_EXIT 101
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#define CMD_CASCADE 200
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#define CMD_TILE 201
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#define CMD_TILE_H 202
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#define CMD_TILE_V 203
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#define CMD_MIN_ON_RUN 104
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#define CMD_ABOUT 300
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#define CMD_TASK_MGR 301
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#define CMD_SYSINFO 302
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// Task Manager column count
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#define TM_COL_COUNT 4
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// ============================================================
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// Module state
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// ============================================================
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// Each discovered .app file in the apps/ directory tree
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typedef struct {
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char name[SHELL_APP_NAME_MAX]; // display name (filename without .app)
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char path[MAX_PATH_LEN]; // full path
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} AppEntryT;
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// Module-level statics (s prefix). DXE apps use file-scoped statics because
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// each DXE is a separate shared object with its own data segment. No risk
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// of collision between apps even though the names look global.
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static DxeAppContextT *sCtx = NULL;
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static AppContextT *sAc = NULL;
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static int32_t sMyAppId = 0;
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static WindowT *sPmWindow = NULL;
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static WidgetT *sStatusLabel = NULL;
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static bool sMinOnRun = false;
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static AppEntryT sAppFiles[MAX_APP_FILES];
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static int32_t sAppCount = 0;
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// ============================================================
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// Prototypes
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// ============================================================
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int32_t appMain(DxeAppContextT *ctx);
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static void buildPmWindow(void);
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static void desktopUpdate(void);
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static void onAppButtonClick(WidgetT *w);
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static void onPmClose(WindowT *win);
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static void onPmMenu(WindowT *win, int32_t menuId);
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static void scanAppsDir(void);
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static void scanAppsDirRecurse(const char *dirPath);
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static void showAboutDialog(void);
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static void showSystemInfo(void);
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static void updateStatusText(void);
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// Task Manager
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static WindowT *sTmWindow = NULL;
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static WidgetT *sTmListView = NULL;
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static void buildTaskManager(void);
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static void onTmClose(WindowT *win);
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static void onTmEndTask(WidgetT *w);
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static void onTmSwitchTo(WidgetT *w);
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static void refreshTaskList(void);
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// ============================================================
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// App descriptor
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// ============================================================
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// The shell reads this exported symbol to determine how to manage the app.
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// hasMainLoop = false means the shell won't create a dedicated task; our
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// appMain runs to completion and all subsequent work happens via callbacks.
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// stackSize = 0 means "use the shell default" (irrelevant for callback apps).
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AppDescriptorT appDescriptor = {
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.name = "Program Manager",
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.hasMainLoop = false,
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.stackSize = SHELL_STACK_DEFAULT,
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.priority = TS_PRIORITY_NORMAL
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};
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// ============================================================
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// Static functions (alphabetical)
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// ============================================================
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// Build the main Program Manager window with app buttons, menus, and status bar.
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// Window is centered horizontally and placed in the upper quarter vertically
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// so spawned app windows don't hide behind it.
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static void buildPmWindow(void) {
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int32_t screenW = sAc->display.width;
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int32_t screenH = sAc->display.height;
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int32_t winW = 440;
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int32_t winH = 340;
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int32_t winX = (screenW - winW) / 2;
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int32_t winY = (screenH - winH) / 4;
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sPmWindow = dvxCreateWindow(sAc, "Program Manager", winX, winY, winW, winH, true);
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if (!sPmWindow) {
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return;
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}
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sPmWindow->onClose = onPmClose;
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sPmWindow->onMenu = onPmMenu;
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// Menu bar
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MenuBarT *menuBar = wmAddMenuBar(sPmWindow);
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MenuT *fileMenu = wmAddMenu(menuBar, "&File");
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wmAddMenuItem(fileMenu, "&Run...", CMD_RUN);
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wmAddMenuSeparator(fileMenu);
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wmAddMenuItem(fileMenu, "E&xit Shell", CMD_EXIT);
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MenuT *optMenu = wmAddMenu(menuBar, "&Options");
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wmAddMenuCheckItem(optMenu, "&Minimize on Run", CMD_MIN_ON_RUN, false);
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MenuT *windowMenu = wmAddMenu(menuBar, "&Window");
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wmAddMenuItem(windowMenu, "&Cascade", CMD_CASCADE);
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wmAddMenuItem(windowMenu, "&Tile", CMD_TILE);
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wmAddMenuItem(windowMenu, "Tile &Horizontally", CMD_TILE_H);
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wmAddMenuItem(windowMenu, "Tile &Vertically", CMD_TILE_V);
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MenuT *helpMenu = wmAddMenu(menuBar, "&Help");
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wmAddMenuItem(helpMenu, "&About DVX Shell...", CMD_ABOUT);
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wmAddMenuItem(helpMenu, "&System Information...", CMD_SYSINFO);
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wmAddMenuSeparator(helpMenu);
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wmAddMenuItem(helpMenu, "&Task Manager\tCtrl+Esc", CMD_TASK_MGR);
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// wgtInitWindow creates the root VBox widget that the window's content
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// area maps to. All child widgets are added to this root.
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WidgetT *root = wgtInitWindow(sAc, sPmWindow);
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// App button grid in a labeled frame. weight=100 tells the layout engine
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// this frame should consume all available vertical space (flex weight).
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WidgetT *appFrame = wgtFrame(root, "Applications");
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appFrame->weight = 100;
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if (sAppCount == 0) {
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WidgetT *lbl = wgtLabel(appFrame, "(No applications found in apps/ directory)");
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(void)lbl;
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} else {
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// Build rows of buttons. Each row is an HBox holding PM_GRID_COLS
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// buttons. userData points back to the AppEntryT so the click
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// callback knows which app to launch.
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int32_t row = 0;
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WidgetT *hbox = NULL;
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for (int32_t i = 0; i < sAppCount; i++) {
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if (i % PM_GRID_COLS == 0) {
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hbox = wgtHBox(appFrame);
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hbox->spacing = wgtPixels(8);
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row++;
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}
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WidgetT *btn = wgtButton(hbox, sAppFiles[i].name);
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btn->prefW = wgtPixels(PM_BTN_W);
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btn->prefH = wgtPixels(PM_BTN_H);
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btn->userData = &sAppFiles[i];
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btn->onDblClick = onAppButtonClick;
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btn->onClick = onAppButtonClick;
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}
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(void)row;
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}
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// Status bar at bottom; weight=100 on the label makes it fill the bar
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// width so text can be left-aligned naturally.
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WidgetT *statusBar = wgtStatusBar(root);
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sStatusLabel = wgtLabel(statusBar, "");
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sStatusLabel->weight = 100;
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updateStatusText();
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// dvxFitWindow sizes the window to tightly fit the widget tree,
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// honoring preferred sizes. Without this, the window would use the
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// initial dimensions from dvxCreateWindow even if widgets don't fit.
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dvxFitWindow(sAc, sPmWindow);
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}
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// Build or raise the Task Manager window. Singleton pattern: if sTmWindow is
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// already live, we just raise it to the top of the Z-order instead of
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// creating a duplicate, mimicking Windows 3.x Task Manager behavior.
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static void buildTaskManager(void) {
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if (sTmWindow) {
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// Already open — find it in the window stack and bring to front
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for (int32_t i = 0; i < sAc->stack.count; i++) {
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if (sAc->stack.windows[i] == sTmWindow) {
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wmRaiseWindow(&sAc->stack, &sAc->dirty, i);
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wmSetFocus(&sAc->stack, &sAc->dirty, sAc->stack.count - 1);
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break;
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}
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}
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return;
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}
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int32_t screenW = sAc->display.width;
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int32_t screenH = sAc->display.height;
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int32_t winW = 420;
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int32_t winH = 280;
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int32_t winX = (screenW - winW) / 2;
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int32_t winY = (screenH - winH) / 3;
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sTmWindow = dvxCreateWindow(sAc, "Task Manager", winX, winY, winW, winH, true);
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if (!sTmWindow) {
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return;
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}
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sTmWindow->onClose = onTmClose;
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WidgetT *root = wgtInitWindow(sAc, sTmWindow);
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// ListView with Name (descriptor), File (basename), Type, Status columns.
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ListViewColT tmCols[TM_COL_COUNT];
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tmCols[0].title = "Name";
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tmCols[0].width = wgtPercent(35);
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tmCols[0].align = ListViewAlignLeftE;
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tmCols[1].title = "File";
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tmCols[1].width = wgtPercent(30);
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tmCols[1].align = ListViewAlignLeftE;
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tmCols[2].title = "Type";
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tmCols[2].width = wgtPercent(17);
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tmCols[2].align = ListViewAlignLeftE;
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tmCols[3].title = "Status";
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tmCols[3].width = wgtPercent(18);
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tmCols[3].align = ListViewAlignLeftE;
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sTmListView = wgtListView(root);
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sTmListView->weight = 100;
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sTmListView->prefH = wgtPixels(160);
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wgtListViewSetColumns(sTmListView, tmCols, TM_COL_COUNT);
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// Button row right-aligned (AlignEndE) to follow Windows UI convention
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WidgetT *btnRow = wgtHBox(root);
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btnRow->align = AlignEndE;
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btnRow->spacing = wgtPixels(8);
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WidgetT *switchBtn = wgtButton(btnRow, "Switch To");
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switchBtn->onClick = onTmSwitchTo;
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switchBtn->prefW = wgtPixels(90);
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WidgetT *endBtn = wgtButton(btnRow, "End Task");
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endBtn->onClick = onTmEndTask;
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endBtn->prefW = wgtPixels(90);
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refreshTaskList();
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dvxFitWindow(sAc, sTmWindow);
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}
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// Shell calls this via shellRegisterDesktopUpdate whenever an app is loaded,
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// reaped, or crashes. We refresh the running count and Task Manager list.
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static void desktopUpdate(void) {
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updateStatusText();
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if (sTmWindow) {
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refreshTaskList();
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}
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}
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// Widget click handler for app grid buttons. userData was set to the
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// AppEntryT pointer during window construction, giving us the .app path.
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static void onAppButtonClick(WidgetT *w) {
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AppEntryT *entry = (AppEntryT *)w->userData;
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if (!entry) {
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return;
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}
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shellLoadApp(sAc, entry->path);
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updateStatusText();
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if (sMinOnRun && sPmWindow) {
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dvxMinimizeWindow(sAc, sPmWindow);
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}
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}
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// Closing the Program Manager is equivalent to shutting down the entire shell.
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// dvxQuit() signals the main event loop to exit, which triggers
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// shellTerminateAllApps() to gracefully tear down all loaded DXEs.
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static void onPmClose(WindowT *win) {
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(void)win;
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int32_t result = dvxMessageBox(sAc, "Exit Shell", "Are you sure you want to exit DVX Shell?", MB_YESNO | MB_ICONQUESTION);
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if (result == ID_YES) {
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dvxQuit(sAc);
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}
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}
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static void onPmMenu(WindowT *win, int32_t menuId) {
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(void)win;
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switch (menuId) {
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case CMD_RUN:
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{
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FileFilterT filters[] = {
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{ "Applications (*.app)", "*.app" },
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{ "All Files (*.*)", "*.*" }
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};
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char path[MAX_PATH_LEN];
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if (dvxFileDialog(sAc, "Run Application", FD_OPEN, "apps", filters, 2, path, sizeof(path))) {
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shellLoadApp(sAc, path);
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updateStatusText();
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if (sMinOnRun && sPmWindow) {
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dvxMinimizeWindow(sAc, sPmWindow);
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}
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}
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}
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break;
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case CMD_EXIT:
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onPmClose(sPmWindow);
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break;
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case CMD_CASCADE:
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dvxCascadeWindows(sAc);
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break;
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case CMD_TILE:
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dvxTileWindows(sAc);
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break;
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case CMD_TILE_H:
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dvxTileWindowsH(sAc);
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break;
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case CMD_TILE_V:
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dvxTileWindowsV(sAc);
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break;
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case CMD_MIN_ON_RUN:
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sMinOnRun = !sMinOnRun;
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break;
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case CMD_ABOUT:
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showAboutDialog();
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break;
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case CMD_SYSINFO:
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showSystemInfo();
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break;
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case CMD_TASK_MGR:
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buildTaskManager();
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break;
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}
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}
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// Null the static pointers before destroying so buildTaskManager() knows
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// the window is gone and will create a fresh one next time.
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static void onTmClose(WindowT *win) {
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sTmListView = NULL;
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sTmWindow = NULL;
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dvxDestroyWindow(sAc, win);
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}
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static void onTmEndTask(WidgetT *w) {
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(void)w;
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if (!sTmListView) {
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return;
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}
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int32_t sel = wgtListViewGetSelected(sTmListView);
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if (sel < 0) {
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return;
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}
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// The list view rows don't carry app IDs directly, so we re-walk the
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// app slot table in the same order as refreshTaskList() to map the
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// selected row index back to the correct ShellAppT. We skip our own
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// appId so progman can't kill itself.
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int32_t idx = 0;
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for (int32_t i = 1; i < SHELL_MAX_APPS; i++) {
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if (i == sMyAppId) {
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continue;
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}
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ShellAppT *app = shellGetApp(i);
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if (app && app->state == AppStateRunningE) {
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if (idx == sel) {
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shellForceKillApp(sAc, app);
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refreshTaskList();
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updateStatusText();
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return;
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}
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idx++;
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}
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}
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}
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static void onTmSwitchTo(WidgetT *w) {
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(void)w;
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if (!sTmListView) {
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return;
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}
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int32_t sel = wgtListViewGetSelected(sTmListView);
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if (sel < 0) {
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return;
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}
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// Same index-to-appId mapping as onTmEndTask. We scan the window
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// stack top-down (highest Z first) to find the app's topmost window,
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// restore it if minimized, then raise and focus it.
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int32_t idx = 0;
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for (int32_t i = 1; i < SHELL_MAX_APPS; i++) {
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if (i == sMyAppId) {
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continue;
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}
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ShellAppT *app = shellGetApp(i);
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if (app && app->state == AppStateRunningE) {
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if (idx == sel) {
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// Find the topmost window for this app
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for (int32_t j = sAc->stack.count - 1; j >= 0; j--) {
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WindowT *win = sAc->stack.windows[j];
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if (win->appId == i) {
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if (win->minimized) {
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wmRestoreMinimized(&sAc->stack, &sAc->dirty, win);
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}
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wmRaiseWindow(&sAc->stack, &sAc->dirty, j);
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wmSetFocus(&sAc->stack, &sAc->dirty, sAc->stack.count - 1);
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return;
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}
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}
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return;
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}
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idx++;
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}
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}
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}
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// Rebuild the Task Manager list view from the shell's app slot table.
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// Uses static arrays because the list view data pointers must remain valid
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// until the next call to wgtListViewSetData (the widget doesn't copy strings).
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static void refreshTaskList(void) {
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if (!sTmListView) {
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return;
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}
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// Flat array of cell strings: [row0_col0..col3, row1_col0..col3, ...]
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static const char *cells[SHELL_MAX_APPS * TM_COL_COUNT];
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static char typeStrs[SHELL_MAX_APPS][12];
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static char fileStrs[SHELL_MAX_APPS][64];
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int32_t rowCount = 0;
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for (int32_t i = 1; i < SHELL_MAX_APPS; i++) {
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if (i == sMyAppId) {
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continue;
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}
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ShellAppT *app = shellGetApp(i);
|
|
|
|
if (app && app->state == AppStateRunningE) {
|
|
int32_t base = rowCount * TM_COL_COUNT;
|
|
|
|
// Column 0: Name (from appDescriptor)
|
|
cells[base] = app->name;
|
|
|
|
// Column 1: Filename (basename of .app path)
|
|
const char *slash = strrchr(app->path, '/');
|
|
const char *back = strrchr(app->path, '\\');
|
|
|
|
if (back > slash) {
|
|
slash = back;
|
|
}
|
|
|
|
const char *fname = slash ? slash + 1 : app->path;
|
|
snprintf(fileStrs[rowCount], sizeof(fileStrs[rowCount]), "%.63s", fname);
|
|
cells[base + 1] = fileStrs[rowCount];
|
|
|
|
// Column 2: Type (main-loop task vs callback-only)
|
|
snprintf(typeStrs[rowCount], sizeof(typeStrs[rowCount]), "%s", app->hasMainLoop ? "Task" : "Callback");
|
|
cells[base + 2] = typeStrs[rowCount];
|
|
|
|
// Column 3: Status
|
|
cells[base + 3] = "Running";
|
|
rowCount++;
|
|
}
|
|
}
|
|
|
|
wgtListViewSetData(sTmListView, cells, rowCount);
|
|
}
|
|
|
|
|
|
// Top-level scan entry point. Recursively walks apps/ looking for .app files.
|
|
// The apps/ path is relative to the working directory, which the shell sets
|
|
// to the root of the DVX install before loading any apps.
|
|
static void scanAppsDir(void) {
|
|
sAppCount = 0;
|
|
scanAppsDirRecurse("apps");
|
|
shellLog("Progman: found %ld app(s)", (long)sAppCount);
|
|
}
|
|
|
|
|
|
// Recursive directory walker. Subdirectories under apps/ allow organizing
|
|
// apps (e.g., apps/games/, apps/tools/). Each .app file is a DXE3 shared
|
|
// object that the shell can dlopen(). We skip progman.app to avoid listing
|
|
// ourselves in the launcher grid.
|
|
static void scanAppsDirRecurse(const char *dirPath) {
|
|
DIR *dir = opendir(dirPath);
|
|
|
|
if (!dir) {
|
|
if (sAppCount == 0) {
|
|
shellLog("Progman: %s directory not found", dirPath);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
struct dirent *ent;
|
|
|
|
while ((ent = readdir(dir)) != NULL && sAppCount < MAX_APP_FILES) {
|
|
// Skip . and ..
|
|
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) {
|
|
continue;
|
|
}
|
|
|
|
char fullPath[MAX_PATH_LEN];
|
|
snprintf(fullPath, sizeof(fullPath), "%s/%s", dirPath, ent->d_name);
|
|
|
|
// Check if this is a directory — recurse into it
|
|
struct stat st;
|
|
|
|
if (stat(fullPath, &st) == 0 && S_ISDIR(st.st_mode)) {
|
|
scanAppsDirRecurse(fullPath);
|
|
continue;
|
|
}
|
|
|
|
int32_t len = strlen(ent->d_name);
|
|
|
|
if (len < 5) {
|
|
continue;
|
|
}
|
|
|
|
// Check for .app extension (case-insensitive)
|
|
const char *ext = ent->d_name + len - 4;
|
|
|
|
if (strcmp(ext, ".app") != 0 && strcmp(ext, ".APP") != 0) {
|
|
continue;
|
|
}
|
|
|
|
// Skip ourselves
|
|
if (strcmp(ent->d_name, "progman.app") == 0 || strcmp(ent->d_name, "PROGMAN.APP") == 0) {
|
|
continue;
|
|
}
|
|
|
|
AppEntryT *entry = &sAppFiles[sAppCount];
|
|
|
|
// Name = filename without extension
|
|
int32_t nameLen = len - 4;
|
|
|
|
if (nameLen >= SHELL_APP_NAME_MAX) {
|
|
nameLen = SHELL_APP_NAME_MAX - 1;
|
|
}
|
|
|
|
memcpy(entry->name, ent->d_name, nameLen);
|
|
entry->name[nameLen] = '\0';
|
|
|
|
// Capitalize first letter for display
|
|
if (entry->name[0] >= 'a' && entry->name[0] <= 'z') {
|
|
entry->name[0] -= 32;
|
|
}
|
|
|
|
snprintf(entry->path, sizeof(entry->path), "%s", fullPath);
|
|
sAppCount++;
|
|
}
|
|
|
|
closedir(dir);
|
|
}
|
|
|
|
|
|
static void showAboutDialog(void) {
|
|
dvxMessageBox(sAc, "About DVX Shell",
|
|
"DVX Shell 1.0\nA DOS Visual eXecutive desktop shell for DJGPP/DPMI. Using DXE3 dynamic loading for application modules.",
|
|
MB_OK | MB_ICONINFO);
|
|
}
|
|
|
|
|
|
static void showSystemInfo(void) {
|
|
const char *info = shellGetSystemInfo();
|
|
|
|
if (!info || !info[0]) {
|
|
dvxMessageBox(sAc, "System Information", "No system information available.", MB_OK | MB_ICONINFO);
|
|
return;
|
|
}
|
|
|
|
// Create a window with a read-only text area
|
|
int32_t screenW = sAc->display.width;
|
|
int32_t screenH = sAc->display.height;
|
|
int32_t winW = 400;
|
|
int32_t winH = 360;
|
|
int32_t winX = (screenW - winW) / 2;
|
|
int32_t winY = (screenH - winH) / 4;
|
|
|
|
WindowT *win = dvxCreateWindow(sAc, "System Information", winX, winY, winW, winH, true);
|
|
|
|
if (!win) {
|
|
return;
|
|
}
|
|
|
|
WidgetT *root = wgtInitWindow(sAc, win);
|
|
WidgetT *ta = wgtTextArea(root, 4096);
|
|
ta->weight = 100;
|
|
wgtSetText(ta, info);
|
|
|
|
// Don't disable — wgtSetEnabled(false) blocks all input including scrollbar
|
|
wgtSetReadOnly(ta, true);
|
|
}
|
|
|
|
|
|
static void updateStatusText(void) {
|
|
if (!sStatusLabel) {
|
|
return;
|
|
}
|
|
|
|
static char buf[64];
|
|
|
|
// shellRunningAppCount() includes us. Subtract 1 so the user sees
|
|
// only the apps they launched, not the Program Manager itself.
|
|
int32_t count = shellRunningAppCount() - 1;
|
|
|
|
if (count < 0) {
|
|
count = 0;
|
|
}
|
|
|
|
if (count == 0) {
|
|
snprintf(buf, sizeof(buf), "No applications running");
|
|
} else if (count == 1) {
|
|
snprintf(buf, sizeof(buf), "1 application running");
|
|
} else {
|
|
snprintf(buf, sizeof(buf), "%ld applications running", (long)count);
|
|
}
|
|
|
|
wgtSetText(sStatusLabel, buf);
|
|
}
|
|
|
|
// ============================================================
|
|
// Entry point
|
|
// ============================================================
|
|
|
|
// The shell calls appMain exactly once after dlopen() resolves our symbols.
|
|
// We scan for apps, build the UI, register our desktop update callback, then
|
|
// return 0 (success). From here on the shell drives us through callbacks.
|
|
// Returning non-zero would signal a load failure and the shell would unload us.
|
|
int32_t appMain(DxeAppContextT *ctx) {
|
|
sCtx = ctx;
|
|
sAc = ctx->shellCtx;
|
|
sMyAppId = ctx->appId;
|
|
|
|
scanAppsDir();
|
|
buildPmWindow();
|
|
|
|
// Register for state change notifications from the shell so our status
|
|
// bar and Task Manager stay current without polling
|
|
shellRegisterDesktopUpdate(desktopUpdate);
|
|
|
|
return 0;
|
|
}
|