explorer/menu.c

   1 #include "../common/cache.h"
   2
   3 #include <shlobj.h>
   4 #include <tchar.h>
   5 #include "../common/menuengine.h"
   6 #include "../common/cheetahmenu.h"
   7 #include "menu.h"
   8 #include "ext.h"
   9 #include "../common/debug.h"
  10 #include "../common/systeminfo.h"
  11 #include "../common/exec.h"
  12
  13 #define LONGEST_MENU_ITEM 40
  14
  15 /*
  16  * Windows-specific Cheetah menu functions
  17  */
  18 struct windows_menu_data {
  19         HMENU menu;
  20         UINT index;
  21         UINT first;
  22         UINT last;
  23 };
  24
  25 void reset_platform(void *platform)
  26 {
  27         /* On Windows, we don't do anything to reset the menu */
  28 }
  29
  30 /*
  31  * menu_item_builder to build a Windows-specific menu separator
  32  *
  33  * Always returns FALSE so the menu engine does not track this item
  34  */
  35 BOOL build_separator(struct git_data *data, const struct menu_item *item,
  36                      void *platform)
  37 {
  38         struct windows_menu_data *windows_menu = platform;
  39         InsertMenu(windows_menu->menu, windows_menu->index,
  40                 MF_SEPARATOR | MF_BYPOSITION, 0, "");
  41         windows_menu->index++;
  42
  43         return FALSE;
  44 }
  45
  46 /*
  47  * menu_item_builder to build a simple menu item
  48  *
  49  * Explorer's context menu are limited in the number of comands
  50  * that they can use, so build_item would:
  51  * - do nothing if that limit is reached and return FALSE to
  52  *   instruct the menu engine to not track this item
  53  * - create item and return TRUE, so the item can be handled later
  54  */
  55 BOOL build_item(struct git_data *data, const struct menu_item *item,
  56                 void *platform)
  57 {
  58         struct windows_menu_data *windows_menu = platform;
  59         if (windows_menu->last < windows_menu->first + next_active_item)
  60                 return FALSE;
  61
  62         InsertMenu(windows_menu->menu, windows_menu->index,
  63                 MF_STRING | MF_BYPOSITION,
  64                 windows_menu->first + next_active_item,
  65                 item->string);
  66
  67         if (item->flags & MI_CHECKED)
  68                 CheckMenuItem(windows_menu->menu, windows_menu->index,
  69                         MF_BYPOSITION | MF_CHECKED);
  70
  71         windows_menu->index++;
  72         return TRUE;
  73 }
  74
  75 void *start_submenu(struct git_data *this_, const struct menu_item *item,
  76                     void *platform)
  77 {
  78         struct windows_menu_data *parent_menu = platform;
  79         struct windows_menu_data *submenu =
  80                 xmalloc(sizeof(struct windows_menu_data));
  81         submenu->menu = CreateMenu();
  82         InsertMenu(parent_menu->menu, parent_menu->index,
  83                 MF_POPUP | MF_BYPOSITION, (UINT_PTR)(submenu->menu),
  84                 item->string);
  85         parent_menu->index++;
  86
  87         submenu->index = 0;
  88         submenu->first = parent_menu->first;
  89         submenu->last = parent_menu->last;
  90
  91         return submenu;
  92 }
  93
  94 void end_submenu(void *parent, void *submenu)
  95 {
  96         free(submenu);
  97 }
  98
  99 /*
 100  * These are the functions for handling the context menu.
 101  */
 102
 103 inline STDMETHODIMP query_context_menu(void *p, HMENU menu,
 104                                        UINT index, UINT first_command,
 105                                        UINT last_command, UINT flags)
 106 {
 107         struct git_menu *this_menu = p;
 108         struct git_data *this_ = this_menu->git_data;
 109         struct windows_menu_data windows_menu =
 110                 { menu, index, first_command, last_command };
 111
 112         if (flags & CMF_DEFAULTONLY)
 113                 return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, 0);
 114
 115         build_cheetah_menu(this_, &windows_menu);
 116
 117         return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL,
 118                 next_active_item);
 119 }
 120
 121 /*
 122  * Perform a couple of transformations, such that a directory
 123  *    C:\Program Files\Bunch of stuff\in\A dir
 124  * becomes
 125  *    /C/Program\ Files/Bunch\ of\ stuff/in/A\ dir
 126  *
 127  * Assumes path is initially a correctly formed Windows-style path.
 128  * Returns a new string.
 129  */
 130 static char *convert_directory_format(const char *path)
 131 {
 132         /* assuming that each character has to be escaped,
 133         allocate twice as much memory */
 134         char *converted = (char *)calloc(2 * strlen(path) + 1, sizeof(char));
 135         char *dst = converted;
 136
 137         /* Transform:
 138         * "\" -> "/"
 139         * chars, special to bash, are escaped with "\"
 140         */
 141         for (; *path; path++)
 142         {
 143                 switch (*path)
 144                 {
 145                 case ' ':
 146                 case '(':
 147                 case ')':
 148                 case ';':
 149                 case '\'':
 150                         *(dst++) = '\\';
 151                         *(dst++) = *path;
 152                         break;
 153                 case '\\':
 154                         *(dst++) = '/';
 155                         break;
 156                 default:
 157                         *(dst++) = *path;
 158                         break;
 159                 }
 160         }
 161         *dst = '\0';
 162
 163         /* X: -> /X */
 164         converted[1] = converted[0];
 165         converted[0] = '/';
 166
 167         return converted;
 168 }
 169
 170 static void free_platform_argv(void *data)
 171 {
 172         free(data);
 173 }
 174
 175 #ifndef _WIN64
 176 #define SYSTEMDIR "system32"
 177 #else
 178 #define SYSTEMDIR "syswow64"
 179 #endif
 180
 181 __attribute__((unused))
 182 static const char *get_cmd(void)
 183 {
 184         static struct strbuf buf = STRBUF_INIT;
 185
 186         if (!buf.len)
 187                 strbuf_addf(&buf, "%s\\" SYSTEMDIR "\\cmd.exe",
 188                         getenv("WINDIR"));
 189
 190         return buf.buf;
 191 }
 192
 193 static void *create_bash_argv(char *wd)
 194 {
 195         /* start is required because exec_program does not create a window */
 196         static const char *bash_argv[] = { NULL, "/c", "start",
 197                 "sh", "-c", NULL, NULL };
 198         static const char *command = "cd %s && sh -l -i";
 199         void *argv = xmalloc(sizeof(bash_argv));
 200         struct strbuf shell_cmd = STRBUF_INIT;
 201         char *converted = convert_directory_format(wd);
 202
 203         /* strbuf_addf allocates only 64 bytes, so we have to grow it manually */
 204         strbuf_grow(&shell_cmd, strlen(converted) + strlen(command) + 1);
 205         strbuf_addf(&shell_cmd, command, converted);
 206         free(converted);
 207
 208         bash_argv[0] = get_cmd();
 209         bash_argv[5] = shell_cmd.buf;
 210
 211         memcpy(argv, bash_argv, sizeof(bash_argv));
 212
 213         /* start the cmd on a system drive, so it does not fail on UNC */
 214         strcpy(wd, getenv("SYSTEMDRIVE"));
 215
 216         return argv;
 217 }
 218
 219 static void free_bash_argv(void *data)
 220 {
 221         void **argv = (void **)data;
 222         free(argv[5]);
 223         free(data);
 224 }
 225
 226 const char **menu_get_platform_argv(menu_commands cmd, void *data,
 227                 free_func_t *free_argv, void **argv_data)
 228 {
 229         char *wd = data;
 230         const char **argv;
 231         const char *history_argv[] = { "sh", "--login", "-i",
 232                 "/bin/gitk", "HEAD", "--", NULL, NULL };
 233         *free_argv = NULL;
 234         *argv_data = NULL;
 235
 236         switch(cmd)
 237         {
 238                 case MENU_HISTORY:
 239                         history_argv[6] = wd;
 240
 241                         argv = xmalloc(sizeof(history_argv));
 242                         memcpy(argv, history_argv, sizeof(history_argv));
 243                         *free_argv = free_platform_argv;
 244
 245                         break;
 246
 247                 case MENU_BASH:
 248
 249                         argv = create_bash_argv(wd);
 250                         *free_argv = free_bash_argv;
 251
 252                         break;
 253
 254                 default:
 255                         return NULL;
 256         }
 257
 258         *argv_data = argv;
 259
 260         return argv;
 261 }
 262
 263 inline STDMETHODIMP invoke_command(void *p,
 264                                    LPCMINVOKECOMMANDINFO info)
 265 {
 266         struct git_menu *this_menu = p;
 267         struct git_data *this_ = this_menu->git_data;
 268         UINT id = LOWORD(info->lpVerb);
 269
 270         if (HIWORD(info->lpVerb))
 271                 return E_INVALIDARG;
 272
 273         handle_menu_item(this_, id);
 274         return S_OK;
 275 }
 276
 277 inline STDMETHODIMP get_command_string(void *p, UINT id,
 278                                        UINT flags, UINT *reserved,
 279                                        LPSTR name, UINT size)
 280 {
 281         const char *text;
 282
 283         if (!(flags & GCS_HELPTEXT))
 284                 return E_INVALIDARG;
 285
 286         text = get_menu_item_text(id);
 287         if (!text)
 288                 return E_INVALIDARG;
 289
 290         if (flags & GCS_UNICODE) {
 291                 size_t len = strlen(text) + 1;
 292                 LPWSTR tw = xmalloc(len * sizeof(wchar_t));
 293                 /* need to convert terminating NULL as well */
 294                 mbstowcs(tw, text, len);
 295                 lstrcpynW((LPWSTR)name, tw, size);
 296                 free(tw);
 297         } else
 298                 lstrcpynA(name, text, size);
 299
 300         return S_OK;
 301 }
 302
 303 DEFINE_STANDARD_METHODS(git_menu)
 304
 305 struct git_menu_virtual_table git_menu_virtual_table = {
 306         query_interface_git_menu,
 307         add_ref_git_menu,
 308         release_git_menu,
 309         query_context_menu,
 310         invoke_command,
 311         get_command_string
 312 };