Fix ascii scrap on sdl2 backend, docs/tests fixes

Author: ankith26

docs/reST/ref/scrap.rst

@@ -77,43 +77,21 @@ data (MIME) types are defined and registered:
 
 ::
 
-   pygame         string
-  constant        value        description
-  --------------------------------------------------
-  SCRAP_TEXT   "text/plain"    plain text
-  SCRAP_BMP    "image/bmp"     BMP encoded image data
-  SCRAP_PBM    "image/pbm"     PBM encoded image data
-  SCRAP_PPM    "image/ppm"     PPM encoded image data
-
-``pygame.SCRAP_PPM``, ``pygame.SCRAP_PBM`` and ``pygame.SCRAP_BMP`` are
-suitable for surface buffers to be shared with other applications.
-``pygame.SCRAP_TEXT`` is an alias for the plain text clipboard type.
-
-Depending on the platform, additional types are automatically registered when
-data is placed into the clipboard to guarantee a consistent sharing behaviour
-with other applications. The following listed types can be used as strings to
-be passed to the respective :mod:`pygame.scrap` module functions.
+  "text/plain"                 Plain text (also accessible via the SCRAP_TEXT constant)
+  "text/plain;charset=utf-8"   UTF-8 encoded text
 
 For **Windows** platforms, these additional types are supported automatically
 and resolve to their internal definitions:
 
 ::
 
-  "text/plain;charset=utf-8"   UTF-8 encoded text
+  "image/bmp"                  BMP encoded image data (also accessible via the SCRAP_BMP constant)
   "audio/wav"                  WAV encoded audio
   "image/tiff"                 TIFF encoded image data
 
-For **X11** platforms, these additional types are supported automatically and
-resolve to their internal definitions:
-
-::
-
-  "text/plain;charset=utf-8"   UTF-8 encoded text
-  "UTF8_STRING"                UTF-8 encoded text
-  "COMPOUND_TEXT"              COMPOUND text
 
-User defined types can be used, but the data might not be accessible by other
-applications unless they know what data type to look for.
+User defined types can be used on **Windows**, but the data might not be
+accessible by other applications unless they know what data type to look for.
 Example: Data placed into the clipboard by
 ``pygame.scrap.put("my_data_type", byte_data)`` can only be accessed by
 applications which query the clipboard for the ``"my_data_type"`` data type.
@@ -125,9 +103,7 @@ For an example of how the scrap module works refer to the examples page
 .. versionaddedold:: 1.8
 
 .. note::
-   The scrap module is currently only supported for Windows, X11 and Mac OS X.
-   On Mac OS X only text works at the moment - other types may be supported in
-   future releases.
+   Non-text data is only supported on Windows. On other platforms only text is supported.
 
 .. function:: init
 
@@ -221,8 +197,8 @@ For an example of how the scrap module works refer to the examples page
    Places data for a given clipboard type into the clipboard. The data must
    be a string buffer. The type is a string identifying the type of data to be
    placed into the clipboard. This can be one of the predefined
-   ``pygame.SCRAP_PBM``, ``pygame.SCRAP_PPM``, ``pygame.SCRAP_BMP`` or
-   ``pygame.SCRAP_TEXT`` values or a user defined string identifier.
+   ``pygame.SCRAP_BMP`` or ``pygame.SCRAP_TEXT`` values or a user defined
+   string identifier.
 
    :param string type: type identifier of the data to be placed into the
       clipboard

src_c/scrap_sdl2.c

@@ -8,31 +8,53 @@
 
 #define PYGAME_SCRAP_FREE_STRING 1
 
-char *pygame_scrap_plaintext_type = "text/plain;charset=utf-8";
+char *pygame_scrap_plaintext_type = "text/plain";
+char *pygame_scrap_utf8text_type = "text/plain;charset=utf-8";
 char **pygame_scrap_types;
 
 int
 pygame_scrap_contains(char *type)
 {
-    return (strcmp(type, pygame_scrap_plaintext_type) == 0) &&
+    return (strcmp(type, pygame_scrap_plaintext_type) == 0 ||
+            strcmp(type, pygame_scrap_utf8text_type) == 0) &&
            SDL_HasClipboardText();
 }
 
+/* Returns 1 if str is valid ascii, 0 otherwise */
+int
+_pg_validate_ascii_str(const char *str)
+{
+    while (*str) {
+        if ((unsigned char)*str > 127) {
+            return 0;
+        }
+        str++;
+    }
+    return 1;
+}
+
 char *
 pygame_scrap_get(char *type, size_t *count)
 {
     char *retval = NULL;
     char *clipboard = NULL;
 
+    if (count) {
+        *count = 0;
+    }
+
     if (!pygame_scrap_initialized()) {
         return RAISE(pgExc_SDLError, "scrap system not initialized.");
     }
 
-    if (strcmp(type, pygame_scrap_plaintext_type) == 0) {
+    int is_utf8 = strcmp(type, pygame_scrap_utf8text_type) == 0;
+    if (is_utf8 || strcmp(type, pygame_scrap_plaintext_type) == 0) {
         clipboard = SDL_GetClipboardText();
         if (clipboard != NULL) {
-            *count = strlen(clipboard);
-            retval = strdup(clipboard);
+            if (is_utf8 || _pg_validate_ascii_str(clipboard)) {
+                *count = strlen(clipboard);
+                retval = strdup(clipboard);
+            }
             SDL_free(clipboard);
             return retval;
         }
@@ -56,13 +78,14 @@ pygame_scrap_init(void)
 {
     SDL_Init(SDL_INIT_VIDEO);
 
-    pygame_scrap_types = malloc(sizeof(char *) * 2);
+    pygame_scrap_types = malloc(sizeof(char *) * 3);
     if (!pygame_scrap_types) {
         return 0;
     }
 
     pygame_scrap_types[0] = pygame_scrap_plaintext_type;
-    pygame_scrap_types[1] = NULL;
+    pygame_scrap_types[1] = pygame_scrap_utf8text_type;
+    pygame_scrap_types[2] = NULL;
 
     _scrapinitialized = 1;
     return _scrapinitialized;
@@ -82,7 +105,8 @@ pygame_scrap_put(char *type, Py_ssize_t srclen, char *src)
         return 0;
     }
 
-    if (strcmp(type, pygame_scrap_plaintext_type) == 0) {
+    if (strcmp(type, pygame_scrap_plaintext_type) == 0 ||
+        strcmp(type, pygame_scrap_utf8text_type) == 0) {
         if (SDL_SetClipboardText(src) == 0) {
             return 1;
         }

test/scrap_tags.py

@@ -1,4 +1,5 @@
 import os
+import platform
 import sys
 import unittest
 
@@ -51,6 +52,10 @@ def todo_test_get(self):
         """Ensures get works as expected."""
         self.fail()
 
+    @unittest.skipIf(
+        platform.system() != "Windows",
+        "scrap features are broken on non windows platforms",
+    )
     def test_get__owned_empty_type(self):
         """Ensures get works when there is no data of the requested type
         in the clipboard and the clipboard is owned by the pygame application.
@@ -95,7 +100,10 @@ def test_put__text(self):
 
         self.assertEqual(scrap.get(pygame.SCRAP_TEXT), b"Another String")
 
-    @unittest.skipIf("pygame.image" not in sys.modules, "requires pygame.image module")
+    @unittest.skipIf(
+        platform.system() != "Windows",
+        "scrap features are broken on non windows platforms",
+    )
     def test_put__bmp_image(self):
         """Ensures put can place a BMP image into the clipboard."""
         sf = pygame.image.load(trunk_relative_path("examples/data/asprite.bmp"))
@@ -104,6 +112,10 @@ def test_put__bmp_image(self):
 
         self.assertEqual(scrap.get(pygame.SCRAP_BMP), expected_bytes)
 
+    @unittest.skipIf(
+        platform.system() != "Windows",
+        "scrap features are broken on non windows platforms",
+    )
     def test_put(self):
         """Ensures put can place data into the clipboard
         when using a user defined type identifier.
@@ -205,109 +217,5 @@ def test_lost__not_owned(self):
         self.assertTrue(lost)
 
 
-class X11InteractiveTest(unittest.TestCase):
-    __tags__ = ["ignore", "subprocess_ignore"]
-    try:
-        pygame.display.init()
-    except Exception:
-        pass
-    else:
-        if pygame.display.get_driver() == "x11":
-            __tags__ = ["interactive"]
-        pygame.display.quit()
-
-    def test_issue_223(self):
-        """PATCH: pygame.scrap on X11, fix copying into PRIMARY selection
-
-        Copying into theX11 PRIMARY selection (mouse copy/paste) would not
-        work due to a confusion between content type and clipboard type.
-
-        """
-
-        from pygame import display, event, freetype
-        from pygame.locals import KEYDOWN, QUIT, SCRAP_SELECTION, SCRAP_TEXT, K_y
-
-        success = False
-        freetype.init()
-        font = freetype.Font(None, 24)
-        display.init()
-        display.set_caption("Interactive X11 Paste Test")
-        screen = display.set_mode((600, 200))
-        screen.fill(pygame.Color("white"))
-        text = "Scrap put() succeeded."
-        msg = (
-            "Some text has been placed into the X11 clipboard."
-            " Please click the center mouse button in an open"
-            " text window to retrieve it."
-            '\n\nDid you get "{}"? (y/n)'
-        ).format(text)
-        word_wrap(screen, msg, font, 6)
-        display.flip()
-        event.pump()
-        scrap.init()
-        scrap.set_mode(SCRAP_SELECTION)
-        scrap.put(SCRAP_TEXT, text.encode("UTF-8"))
-        while True:
-            e = event.wait()
-            if e.type == QUIT:
-                break
-            if e.type == KEYDOWN:
-                success = e.key == K_y
-                break
-        pygame.display.quit()
-        self.assertTrue(success)
-
-
-def word_wrap(surf, text, font, margin=0, color=(0, 0, 0)):
-    font.origin = True
-    surf_width, surf_height = surf.get_size()
-    width = surf_width - 2 * margin
-    height = surf_height - 2 * margin
-    line_spacing = int(1.25 * font.get_sized_height())
-    x, y = margin, margin + line_spacing
-    space = font.get_rect(" ")
-    for word in iwords(text):
-        if word == "\n":
-            x, y = margin, y + line_spacing
-        else:
-            bounds = font.get_rect(word)
-            if x + bounds.width + bounds.x >= width:
-                x, y = margin, y + line_spacing
-            if x + bounds.width + bounds.x >= width:
-                raise ValueError("word too wide for the surface")
-            if y + bounds.height - bounds.y >= height:
-                raise ValueError("text to long for the surface")
-            font.render_to(surf, (x, y), None, color)
-            x += bounds.width + space.width
-    return x, y
-
-
-def iwords(text):
-    #  r"\n|[^ ]+"
-    #
-    head = 0
-    tail = head
-    end = len(text)
-    while head < end:
-        if text[head] == " ":
-            head += 1
-            tail = head + 1
-        elif text[head] == "\n":
-            head += 1
-            yield "\n"
-            tail = head + 1
-        elif tail == end:
-            yield text[head:]
-            head = end
-        elif text[tail] == "\n":
-            yield text[head:tail]
-            head = tail
-        elif text[tail] == " ":
-            yield text[head:tail]
-            head = tail
-        else:
-            tail += 1
-
-
 if __name__ == "__main__":
     unittest.main()