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ac5b9bc4ee
X11 has a so-called primary selection, which you can use by marking text and middle-clicking elsewhere to copy the marked text.
There are 3 new API functions in `SDL_clipboard.h`, which work exactly like their clipboard equivalents.
## Test Instructions
* Run the tests (just a copy of the clipboard tests): `$ ./test/testautomation --filter Clipboard`
* Build and run this small application:
<details>
```C
#include <SDL.h>
#include <unistd.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void print_error(const char *where)
{
const char *errstr = SDL_GetError();
if (errstr == NULL || errstr[0] == '\0')
return;
fprintf(stderr, "SDL Error after '%s': %s\n", where, errstr);
SDL_ClearError();
}
int main()
{
char text_buf[256];
srand(time(NULL));
SDL_Init(SDL_INIT_VIDEO);
print_error("SDL_INIT()");
SDL_Window *window = SDL_CreateWindow("Primary Selection Test", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, 400, 400, SDL_WINDOW_SHOWN);
print_error("SDL_CreateWindow()");
SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
print_error("SDL_CreateRenderer()");
bool quit = false;
unsigned int do_render = 0;
while (!quit) {
SDL_Event event;
while (SDL_PollEvent(&event)) {
print_error("SDL_PollEvent()");
switch (event.type) {
case SDL_QUIT: {
quit = true;
break;
} case SDL_KEYDOWN: {
switch (event.key.keysym.sym) {
case SDLK_ESCAPE:
case SDLK_q:
quit = true;
break;
case SDLK_c:
snprintf(text_buf, sizeof(text_buf), "foo%d", rand());
SDL_SetClipboardText(text_buf);
print_error("SDL_SetClipboardText()");
printf("clipboard: set_to=\"%s\"\n", text_buf);
break;
case SDLK_v: {
printf("clipboard: has=%d, ", SDL_HasClipboardText());
print_error("SDL_HasClipboardText()");
char *text = SDL_GetClipboardText();
print_error("SDL_GetClipboardText()");
printf("text=\"%s\"\n", text);
SDL_free(text);
break;
} case SDLK_d:
snprintf(text_buf, sizeof(text_buf), "bar%d", rand());
SDL_SetPrimarySelectionText(text_buf);
print_error("SDL_SetPrimarySelectionText()");
printf("primselec: set_to=\"%s\"\n", text_buf);
break;
case SDLK_f: {
printf("primselec: has=%d, ", SDL_HasPrimarySelectionText());
print_error("SDL_HasPrimarySelectionText()");
char *text = SDL_GetPrimarySelectionText();
print_error("SDL_GetPrimarySelectionText()");
printf("text=\"%s\"\n", text);
SDL_free(text);
break;
} default:
break;
}
break;
} default: {
break;
}}
}
// create less noise with WAYLAND_DEBUG=1
if (do_render == 0) {
SDL_RenderPresent(renderer);
print_error("SDL_RenderPresent()");
}
do_render += 1;
usleep(12000);
}
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
print_error("quit");
return 0;
}
```
</details>
* Use c,v,d,f to get and set the clipboard and primary selection.
* Mark text and middle-click also in other applications.
* For wayland under x:
* `$ mutter --wayland --no-x11 --nested`
* `$ XDG_SESSION_TYPE=wayland SDL_VIDEODRIVER=wayland ./<path_to_test_appl_binary>`
141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/**
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* \file SDL_clipboard.h
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*
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* Include file for SDL clipboard handling
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*/
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#ifndef SDL_clipboard_h_
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#define SDL_clipboard_h_
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#include "SDL_stdinc.h"
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Function prototypes */
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/**
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* Put UTF-8 text into the clipboard.
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*
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* \param text the text to store in the clipboard
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_GetClipboardText
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* \sa SDL_HasClipboardText
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*/
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extern DECLSPEC int SDLCALL SDL_SetClipboardText(const char *text);
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/**
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* Get UTF-8 text from the clipboard, which must be freed with SDL_free().
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*
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* This functions returns empty string if there was not enough memory left for
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* a copy of the clipboard's content.
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*
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* \returns the clipboard text on success or an empty string on failure; call
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* SDL_GetError() for more information. Caller must call SDL_free()
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* on the returned pointer when done with it (even if there was an
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* error).
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_HasClipboardText
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* \sa SDL_SetClipboardText
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*/
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extern DECLSPEC char * SDLCALL SDL_GetClipboardText(void);
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/**
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* Query whether the clipboard exists and contains a non-empty text string.
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*
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* \returns SDL_TRUE if the clipboard has text, or SDL_FALSE if it does not.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_GetClipboardText
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* \sa SDL_SetClipboardText
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_HasClipboardText(void);
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/**
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* Put UTF-8 text into the primary selection.
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*
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* \param text the text to store in the primary selection
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.25.0.
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*
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* \sa SDL_GetPrimarySelectionText
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* \sa SDL_HasPrimarySelectionText
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*/
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extern DECLSPEC int SDLCALL SDL_SetPrimarySelectionText(const char *text);
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/**
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* Get UTF-8 text from the primary selection, which must be freed with SDL_free().
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*
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* This functions returns empty string if there was not enough memory left for
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* a copy of the primary selection's content.
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*
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* \returns the primary selection text on success or an empty string on failure;
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* call SDL_GetError() for more information. Caller must call SDL_free()
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* on the returned pointer when done with it (even if there was an
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* error).
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*
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* \since This function is available since SDL 2.25.0.
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*
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* \sa SDL_HasPrimarySelectionText
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* \sa SDL_SetPrimarySelectionText
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*/
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extern DECLSPEC char * SDLCALL SDL_GetPrimarySelectionText(void);
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/**
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* Query whether the primary selection exists and contains a non-empty text
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* string.
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*
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* \returns SDL_TRUE if the primary selection has text, or SDL_FALSE if it does
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* not.
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*
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* \since This function is available since SDL 2.25.0.
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*
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* \sa SDL_GetPrimarySelectionText
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* \sa SDL_SetPrimarySelectionText
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_HasPrimarySelectionText(void);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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}
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#endif
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#include "close_code.h"
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#endif /* SDL_clipboard_h_ */
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/* vi: set ts=4 sw=4 expandtab: */
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