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H2_STREAM Struct HASH_NODE Struct HASH_TABLE Struct ISO_DRAW_ENTRY Struct ISO_MAP Struct ISO_PROJECTION Struct ISO_TILE_SEGMENT Struct ISO_TILE_SEGMENTS Struct ISO_VISIBLE_EDGES Struct JS_STATE Struct LEX_ITEM Struct LIST Struct LIST_NODE Struct LOG_LEVELS Struct LexMenu Struct MEMBER Struct MIDI Struct NESTED Struct NETWORK Struct NETWORK_HTTP_INFO Struct NETWORK_POOL Struct NETWORK_SSL_THREAD_PARAMS Struct NETW_ACCEPT_POOL Struct NETW_ACCEPT_POOL_STATS Struct NETW_MSG Struct NETW_SNI_ARG Struct NODE_DATA Struct N_ATLAS Struct N_ATLAS_PAGE Struct N_CLOCK_SYNC Struct N_COOKIE Struct N_COOKIE_JAR Struct N_DIFF_LINE Struct N_DIFF_RESULT Struct N_DISK_CACHE Struct N_ENTROPY_BIT Struct N_ENTROPY_POS Struct N_FILE_INFO Struct N_FLUID Struct N_FLUID_THREAD_PARAMS Struct N_FORM_FIELD Struct N_GIT_COMMIT_INFO Struct N_GIT_REMOTE_AUTH Struct N_GIT_REPO Struct N_GIT_STATUS_ENTRY Struct N_GUI_BUTTON_DATA Struct N_GUI_CHECKBOX_DATA Struct N_GUI_COLOR_PICKER Struct N_GUI_COMBOBOX_DATA Struct N_GUI_CTX Struct N_GUI_CUSTOM_DATA Struct N_GUI_DATAGRID_COL Struct N_GUI_DATAGRID_DATA Struct N_GUI_DROPMENU_DATA Struct N_GUI_DROPMENU_ENTRY Struct N_GUI_GRID_CALLBACKS Struct N_GUI_HEXVIEW_DATA Struct N_GUI_IMAGE_DATA Struct N_GUI_KVTABLE Struct N_GUI_KV_CONTENT Struct N_GUI_KV_ROW Struct N_GUI_LABEL_DATA Struct N_GUI_LISTBOX_DATA Struct N_GUI_LISTITEM Struct N_GUI_MARKDOWNVIEW_DATA Struct N_GUI_MD_FONTS Struct N_GUI_MD_STYLE Struct N_GUI_MEAS_ENTRY Struct N_GUI_MOUSE_EVENT Struct N_GUI_PENDING_GEOM Struct N_GUI_PENDING_WIDGET Struct N_GUI_POPUP Struct N_GUI_PROGRESSBAR_DATA Struct N_GUI_RADIOLIST_DATA Struct N_GUI_SB_TRACK Struct N_GUI_SCROLLBAR_DATA Struct N_GUI_SECTION Struct N_GUI_SECTIONLIST Struct N_GUI_SLIDER_DATA Struct N_GUI_SPLITPANE_DATA Struct N_GUI_STYLE Struct N_GUI_SUGGEST_SINK Struct N_GUI_SYNTAXVIEW_DATA Struct N_GUI_TAB_PANEL Struct N_GUI_TB_BUTTONS Struct N_GUI_TEXTAREA_DATA Struct N_GUI_TEXT_DIMS Struct N_GUI_THEME Struct N_GUI_TREE Struct N_GUI_TREE_NODE Struct 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Struct N_STR Struct N_TIFF Struct N_TIFF_ENTRY Struct N_TIME Struct N_URL Struct N_URL_PARAM Struct N_USER Struct N_USERLIST Struct N_WS_CONN Struct N_WS_FRAME Struct N_WS_MESSAGE Struct N_ZIP_MEMBER Struct OCTREE Struct OCTREE_NODE Struct PARSER Struct PARTICLE Struct PARTICLE_EMITTER Struct PARTICLE_SYSTEM Struct PEER Struct PHYSICS Struct PK_OBJ Struct PK_VM Struct POINT2D Struct POINT3D Struct PRETTY_OUT Struct QNODE Struct QUADTREE Struct QUADTREE_NODE Struct REC Struct RGB Struct SAMPLE Struct SEEN Struct SHARER Struct SRV Struct SRV_ARG Struct STACK Struct STACK_ITEM Struct SYNTAX_RUN Struct THREAD_POOL Struct THREAD_POOL_NODE Struct THREAD_WAITING_PROC Struct TRAJECTORY Struct TRAJECTORY_POINT Struct TREE Struct TREE_NODE Struct TS_LOG Struct WAYPOINT3D Struct WORKER_ARG Struct ZIP_SINK Struct _N_DC_ENTRY Struct _N_DC_GROUP_ENTRY Struct _N_GUI_COLORWHEEL Struct _N_GUI_COLORWHEEL_BLOCK Struct _N_GUI_COLORWHEEL_MOUSE Struct _N_GUI_CURVE Struct _N_GUI_CURVE_BLOCK Struct _N_GUI_CURVE_MOUSE Struct _N_GUI_GRID Struct _N_GUI_POPUP_ENTRY Struct _N_GUI_POPUP_LEVEL Struct _N_GUI_SB_SKIN Struct _N_GUI_TA_STEP Struct _N_GUI_THUMB Struct _N_GUI_WRAP_ACC Struct _compiled Struct _conn Struct _ip_slot Struct _mp_param Struct _n_civil Struct _seg Struct client Struct collector Struct date_vector Struct md_atom Struct md_cells Struct md_hit Struct md_line_ctx Struct mline Struct n_http_req_header Struct n_http_req_limits Struct n_http_request Struct n_markdown_block Struct n_markdown_doc Struct n_markdown_inline Struct n_markdown_span Struct n_reactor_stats Struct n_url_safe Struct n_url_safe_head Struct n_wrap_item Struct producer_state Struct rects Struct reply Struct runner Struct sink Struct tbuf Struct wrap_hit Struct wrap_span Structures Union COORD_VALUE Union HASH_DATA Union NODE_DATA_TYPES Union STACK_DATA dir_310dcdd4703e877a6b99d5dc3fc54d27 dir_68267d1309a1af8e8297ef4c3efbcdba dir_d28a4824dc47e487b107a5db32ef43c4 dir_d44c64559bbebec7f509842c48db8b23 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ex_gui_window_rect_8c example ex_gui_zorder_8c example ex_hash_8c example ex_hex_8c example ex_html_8c example ex_http2_8c example ex_http2_server_8c example ex_http_cookie_8c example ex_http_form_8c example ex_http_mime_8c example ex_http_req_8c example ex_http_response_8c example ex_http_router_8c example ex_http_server_8c example ex_icc_8c example ex_iso_astar_8c example ex_json_8c example ex_kafka_8c example ex_linalg_8c example ex_list_8c example ex_log_8c example ex_markdown_8c example ex_module_8c example ex_monolith_8c example ex_network_8c example ex_network_8h example ex_network_accept_8c example ex_network_alpn_8c example ex_network_connect_abort_8c example ex_network_mock_8c example ex_network_proxy_8c example ex_network_reactor_8c example ex_network_sni_8c example ex_network_sse_8c example ex_network_ssl_8c example ex_network_ssl_hardened_8c example ex_network_ssl_hostname_8c example ex_network_ssl_nonblock_8c example ex_network_tls_defaults_8c example ex_network_ws_8c example ex_network_ws_limits_8c example ex_nstr_8c example ex_parallel_for_8c example ex_parallel_team_8c example ex_pcre_8c example ex_pretty_8c example ex_pth_8c example ex_query_8c example ex_random_8c example ex_sha256_8c example ex_signals_8c example ex_spawn_8c example ex_ssrf_8c example ex_stack_8c example ex_threads_8c example ex_tiff_8c example ex_time_formats_8c example ex_trajectory_8c example ex_trees_8c example ex_url_8c example ex_url_safe_8c example ex_wrap_8c example ex_x509_8c example ex_zip_8c example ex_zlib_8c example mainpage_8dox n__3d_8c n__3d_8h n__aabb_8c n__aabb_8h n__allegro5_8c n__allegro5_8h n__allegro__4_8c n__allegro__4_8h n__anim_8c n__anim_8h n__astar_8c n__astar_8h n__atlas_8c n__atlas_8h n__avro_8c n__avro_8h n__base64_8c n__base64_8h n__clipboard_8c n__clipboard_8h n__clock__sync_8c n__clock__sync_8h n__common_8c n__common_8h n__config__file_8c n__config__file_8h n__cookies_8c n__cookies_8h n__crypto_8c n__crypto_8h n__dead__reckoning_8c 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6 n__clipboard_8h
gullradriel edited this page 2026-10-09 00:55:18 +02:00
Table of Contents

include/nilorea/n_clipboard.h

System clipboard: full X11 selection support on Linux, Win32 clipboard on Windows/MinGW. More...

Functions

Name
int n_clipboard_set(int which, const char * text)
Own which selection and serve text to any app that requests it.
int n_clipboard_init(void )
Start the clipboard backend (idempotent; also started lazily on first use).
char * n_clipboard_get(int which)
Fetch the current text of which selection from its owner.
void n_clipboard_destroy(void )
Stop the backend thread and release the display connection.
int n_clipboard_available(void )
Whether a real clipboard backend (X11 or Win32) is active on this platform.

Defines

Name
N_CLIPBOARD_PRIMARY
the X11 PRIMARY selection (mouse select-to-copy / middle-click paste); a no-op on Windows, which has no PRIMARY selection
N_CLIPBOARD_CLIPBOARD
the Ctrl+C / Ctrl+V clipboard selection

Detailed Description

System clipboard: full X11 selection support on Linux, Win32 clipboard on Windows/MinGW.

Author: Castagnier Mickael

Version: 1.0

Date: 20/07/2026

On Linux/X11 a small backend owns the X11 CLIPBOARD and PRIMARY selections itself and answers SelectionRequest with the full target set (UTF8_STRING, STRING, TEXT, text/plain, text/plain;charset=utf-8, and TARGETS), so strict consumers such as Chromium (which query TARGETS and want text/plain;charset= utf-8) can paste text this process copies - which a UTF8_STRING-only backend fails to satisfy. It also exposes the X11 PRIMARY selection (select-to-copy / middle-click paste) that the ordinary clipboard API cannot reach. A background thread on a dedicated X display connection serves requests promptly even while the GUI is idle.

On Windows (MinGW) N_CLIPBOARD_CLIPBOARD maps to the Win32 system clipboard (CF_UNICODETEXT, UTF-8 <-> UTF-16 internally); Windows has no PRIMARY selection, so N_CLIPBOARD_PRIMARY is a graceful no-op there (set does nothing, get returns NULL). Text always crosses this API as UTF-8.

On any other platform the backend is unavailable (n_clipboard_available() returns 0) and the caller should fall back to its toolkit's own clipboard.

Functions Documentation

function n_clipboard_set

int n_clipboard_set(
    int which,
    const char * text
)

Own which selection and serve text to any app that requests it.

Parameters:

  • which N_CLIPBOARD_CLIPBOARD or N_CLIPBOARD_PRIMARY.
  • text The UTF-8 text to publish (copied). NULL/empty relinquishes it.

Return: 0 on success, -1 on failure / no backend.

function n_clipboard_init

int n_clipboard_init(
    void 
)

Start the clipboard backend (idempotent; also started lazily on first use).

Return: 0 on success, -1 when no backend is available on this platform.

function n_clipboard_get

char * n_clipboard_get(
    int which
)

Fetch the current text of which selection from its owner.

Parameters:

  • which N_CLIPBOARD_CLIPBOARD or N_CLIPBOARD_PRIMARY.

Return: A newly allocated UTF-8 string (free with free()), or NULL when empty, unavailable, or the owner did not answer in time.

function n_clipboard_destroy

void n_clipboard_destroy(
    void 
)

Stop the backend thread and release the display connection.

function n_clipboard_available

int n_clipboard_available(
    void 
)

Whether a real clipboard backend (X11 or Win32) is active on this platform.

Return: 1 if available, 0 otherwise (caller should use its toolkit clipboard).

Macros Documentation

define N_CLIPBOARD_PRIMARY

#define N_CLIPBOARD_PRIMARY 1

the X11 PRIMARY selection (mouse select-to-copy / middle-click paste); a no-op on Windows, which has no PRIMARY selection

define N_CLIPBOARD_CLIPBOARD

#define N_CLIPBOARD_CLIPBOARD 0

the Ctrl+C / Ctrl+V clipboard selection

Source code

/*
 * Nilorea Library
 * Copyright (C) 2005-2026 Castagnier Mickael
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */


#ifndef __N_CLIPBOARD_H
#define __N_CLIPBOARD_H

#ifdef __cplusplus
extern "C" {
#endif

#define N_CLIPBOARD_CLIPBOARD 0
#define N_CLIPBOARD_PRIMARY 1

int n_clipboard_init(void);

int n_clipboard_available(void);

int n_clipboard_set(int which, const char* text);

char* n_clipboard_get(int which);

void n_clipboard_destroy(void);

#ifdef __cplusplus
}
#endif

#endif /* __N_CLIPBOARD_H */

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