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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>`
226 lines
10 KiB
XML
226 lines
10 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="wp_primary_selection_unstable_v1">
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<copyright>
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Copyright © 2015, 2016 Red Hat
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice (including the next
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paragraph) shall be included in all copies or substantial portions of the
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Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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</copyright>
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<description summary="Primary selection protocol">
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This protocol provides the ability to have a primary selection device to
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match that of the X server. This primary selection is a shortcut to the
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common clipboard selection, where text just needs to be selected in order
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to allow copying it elsewhere. The de facto way to perform this action
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is the middle mouse button, although it is not limited to this one.
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Clients wishing to honor primary selection should create a primary
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selection source and set it as the selection through
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wp_primary_selection_device.set_selection whenever the text selection
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changes. In order to minimize calls in pointer-driven text selection,
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it should happen only once after the operation finished. Similarly,
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a NULL source should be set when text is unselected.
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wp_primary_selection_offer objects are first announced through the
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wp_primary_selection_device.data_offer event. Immediately after this event,
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the primary data offer will emit wp_primary_selection_offer.offer events
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to let know of the mime types being offered.
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When the primary selection changes, the client with the keyboard focus
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will receive wp_primary_selection_device.selection events. Only the client
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with the keyboard focus will receive such events with a non-NULL
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wp_primary_selection_offer. Across keyboard focus changes, previously
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focused clients will receive wp_primary_selection_device.events with a
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NULL wp_primary_selection_offer.
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In order to request the primary selection data, the client must pass
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a recent serial pertaining to the press event that is triggering the
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operation, if the compositor deems the serial valid and recent, the
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wp_primary_selection_source.send event will happen in the other end
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to let the transfer begin. The client owning the primary selection
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should write the requested data, and close the file descriptor
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immediately.
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If the primary selection owner client disappeared during the transfer,
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the client reading the data will receive a
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wp_primary_selection_device.selection event with a NULL
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wp_primary_selection_offer, the client should take this as a hint
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to finish the reads related to the no longer existing offer.
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The primary selection owner should be checking for errors during
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writes, merely cancelling the ongoing transfer if any happened.
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</description>
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<interface name="zwp_primary_selection_device_manager_v1" version="1">
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<description summary="X primary selection emulation">
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The primary selection device manager is a singleton global object that
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provides access to the primary selection. It allows to create
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wp_primary_selection_source objects, as well as retrieving the per-seat
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wp_primary_selection_device objects.
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</description>
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<request name="create_source">
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<description summary="create a new primary selection source">
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Create a new primary selection source.
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</description>
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<arg name="id" type="new_id" interface="zwp_primary_selection_source_v1"/>
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</request>
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<request name="get_device">
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<description summary="create a new primary selection device">
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Create a new data device for a given seat.
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</description>
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<arg name="id" type="new_id" interface="zwp_primary_selection_device_v1"/>
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<arg name="seat" type="object" interface="wl_seat"/>
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</request>
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<request name="destroy" type="destructor">
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<description summary="destroy the primary selection device manager">
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Destroy the primary selection device manager.
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</description>
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</request>
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</interface>
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<interface name="zwp_primary_selection_device_v1" version="1">
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<request name="set_selection">
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<description summary="set the primary selection">
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Replaces the current selection. The previous owner of the primary
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selection will receive a wp_primary_selection_source.cancelled event.
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To unset the selection, set the source to NULL.
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</description>
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<arg name="source" type="object" interface="zwp_primary_selection_source_v1" allow-null="true"/>
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<arg name="serial" type="uint" summary="serial of the event that triggered this request"/>
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</request>
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<event name="data_offer">
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<description summary="introduce a new wp_primary_selection_offer">
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Introduces a new wp_primary_selection_offer object that may be used
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to receive the current primary selection. Immediately following this
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event, the new wp_primary_selection_offer object will send
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wp_primary_selection_offer.offer events to describe the offered mime
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types.
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</description>
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<arg name="offer" type="new_id" interface="zwp_primary_selection_offer_v1"/>
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</event>
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<event name="selection">
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<description summary="advertise a new primary selection">
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The wp_primary_selection_device.selection event is sent to notify the
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client of a new primary selection. This event is sent after the
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wp_primary_selection.data_offer event introducing this object, and after
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the offer has announced its mimetypes through
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wp_primary_selection_offer.offer.
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The data_offer is valid until a new offer or NULL is received
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or until the client loses keyboard focus. The client must destroy the
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previous selection data_offer, if any, upon receiving this event.
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</description>
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<arg name="id" type="object" interface="zwp_primary_selection_offer_v1" allow-null="true"/>
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</event>
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<request name="destroy" type="destructor">
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<description summary="destroy the primary selection device">
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Destroy the primary selection device.
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</description>
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</request>
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</interface>
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<interface name="zwp_primary_selection_offer_v1" version="1">
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<description summary="offer to transfer primary selection contents">
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A wp_primary_selection_offer represents an offer to transfer the contents
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of the primary selection clipboard to the client. Similar to
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wl_data_offer, the offer also describes the mime types that the data can
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be converted to and provides the mechanisms for transferring the data
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directly to the client.
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</description>
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<request name="receive">
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<description summary="request that the data is transferred">
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To transfer the contents of the primary selection clipboard, the client
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issues this request and indicates the mime type that it wants to
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receive. The transfer happens through the passed file descriptor
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(typically created with the pipe system call). The source client writes
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the data in the mime type representation requested and then closes the
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file descriptor.
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The receiving client reads from the read end of the pipe until EOF and
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closes its end, at which point the transfer is complete.
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</description>
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<arg name="mime_type" type="string"/>
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<arg name="fd" type="fd"/>
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</request>
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<request name="destroy" type="destructor">
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<description summary="destroy the primary selection offer">
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Destroy the primary selection offer.
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</description>
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</request>
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<event name="offer">
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<description summary="advertise offered mime type">
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Sent immediately after creating announcing the
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wp_primary_selection_offer through
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wp_primary_selection_device.data_offer. One event is sent per offered
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mime type.
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</description>
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<arg name="mime_type" type="string"/>
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</event>
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</interface>
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<interface name="zwp_primary_selection_source_v1" version="1">
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<description summary="offer to replace the contents of the primary selection">
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The source side of a wp_primary_selection_offer, it provides a way to
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describe the offered data and respond to requests to transfer the
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requested contents of the primary selection clipboard.
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</description>
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<request name="offer">
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<description summary="add an offered mime type">
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This request adds a mime type to the set of mime types advertised to
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targets. Can be called several times to offer multiple types.
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</description>
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<arg name="mime_type" type="string"/>
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</request>
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<request name="destroy" type="destructor">
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<description summary="destroy the primary selection source">
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Destroy the primary selection source.
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</description>
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</request>
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<event name="send">
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<description summary="send the primary selection contents">
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Request for the current primary selection contents from the client.
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Send the specified mime type over the passed file descriptor, then
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close it.
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</description>
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<arg name="mime_type" type="string"/>
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<arg name="fd" type="fd"/>
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</event>
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<event name="cancelled">
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<description summary="request for primary selection contents was canceled">
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This primary selection source is no longer valid. The client should
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clean up and destroy this primary selection source.
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</description>
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</event>
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</interface>
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</protocol>
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