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Adding splitting screen and buffer switching

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Arthur Barraux
2026-01-24 19:29:46 +01:00
parent b039cf3ded
commit 5a7b073041
22 changed files with 1171 additions and 384 deletions
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src/split_screen.c
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/**
* @file split_screen.c
* @brief Split screen implementation
*/
#include "../include/split_screen.h"
#include "../include/buffer.h"
#include "../include/editor_op.h"
#include <stdlib.h>
#include <string.h>
extern struct editorConfig E;
/**
* @brief Initializes split screen system with single fullscreen pane
*/
void splitScreenInit(void) {
E.layout.mode = SPLIT_NONE;
E.layout.num_panes = 1;
E.layout.active_pane = 0;
E.layout.panes = malloc(sizeof(EditorPane) * 2);
// Initialize single fullscreen pane
E.layout.panes[0].buffer_id = -1; // No buffer for now
E.layout.panes[0].start_row = 0;
E.layout.panes[0].start_col = 0;
E.layout.panes[0].height = E.screenrows - 2; // Leave room for status bar
E.layout.panes[0].width = E.screencols;
E.layout.panes[0].cursor_x = 0;
E.layout.panes[0].cursor_y = 0;
E.layout.panes[0].row_offset = 0;
E.layout.panes[0].col_offset = 0;
E.layout.panes[0].is_active = 1;
}
/**
* @brief Splits screen vertically (left-right)
* @param buffer_id_left Buffer ID for left pane
* @param buffer_id_right Buffer ID for right pane
* @return 0 on success, -1 on failure
*/
int splitScreenVertical(int buffer_id_left, int buffer_id_right) {
// Verify both buffers exist
if (bufferFindById(buffer_id_left) == NULL ||
bufferFindById(buffer_id_right) == NULL) {
editorSetStatusMessage("Error: invalid buffer IDs");
return -1;
}
// Reallocate panes array
E.layout.panes = realloc(E.layout.panes, sizeof(EditorPane) * 2);
E.layout.mode = SPLIT_VERTICAL;
E.layout.num_panes = 2;
E.layout.active_pane = 0;
int half_width = E.screencols / 2;
int pane_height = E.screenrows - 2; // Leave room for status bar
// Left pane
E.layout.panes[0].buffer_id = buffer_id_left;
E.layout.panes[0].start_row = 0;
E.layout.panes[0].start_col = 0;
E.layout.panes[0].height = pane_height;
E.layout.panes[0].width = half_width;
E.layout.panes[0].cursor_x = 0;
E.layout.panes[0].cursor_y = 0;
E.layout.panes[0].row_offset = 0;
E.layout.panes[0].col_offset = 0;
E.layout.panes[0].is_active = 1;
// Right pane
E.layout.panes[1].buffer_id = buffer_id_right;
E.layout.panes[1].start_row = 0;
E.layout.panes[1].start_col = half_width;
E.layout.panes[1].height = pane_height;
E.layout.panes[1].width = E.screencols - half_width;
E.layout.panes[1].cursor_x = 0;
E.layout.panes[1].cursor_y = 0;
E.layout.panes[1].row_offset = 0;
E.layout.panes[1].col_offset = 0;
E.layout.panes[1].is_active = 0;
editorSetStatusMessage("Vertical split: %d | %d", buffer_id_left, buffer_id_right);
return 0;
}
/**
* @brief Splits screen horizontally (top-bottom)
* @param buffer_id_top Buffer ID for top pane
* @param buffer_id_bottom Buffer ID for bottom pane
* @return 0 on success, -1 on failure
*/
int splitScreenHorizontal(int buffer_id_top, int buffer_id_bottom) {
// Verify both buffers exist
if (bufferFindById(buffer_id_top) == NULL ||
bufferFindById(buffer_id_bottom) == NULL) {
editorSetStatusMessage("Error: invalid buffer IDs");
return -1;
}
// Reallocate panes array
E.layout.panes = realloc(E.layout.panes, sizeof(EditorPane) * 2);
E.layout.mode = SPLIT_HORIZONTAL;
E.layout.num_panes = 2;
E.layout.active_pane = 0;
int half_height = (E.screenrows - 2) / 2; // Account for status bar
// Top pane
E.layout.panes[0].buffer_id = buffer_id_top;
E.layout.panes[0].start_row = 0;
E.layout.panes[0].start_col = 0;
E.layout.panes[0].height = half_height;
E.layout.panes[0].width = E.screencols;
E.layout.panes[0].cursor_x = 0;
E.layout.panes[0].cursor_y = 0;
E.layout.panes[0].row_offset = 0;
E.layout.panes[0].col_offset = 0;
E.layout.panes[0].is_active = 1;
// Bottom pane
E.layout.panes[1].buffer_id = buffer_id_bottom;
E.layout.panes[1].start_row = half_height;
E.layout.panes[1].start_col = 0;
E.layout.panes[1].height = E.screenrows - 2 - half_height;
E.layout.panes[1].width = E.screencols;
E.layout.panes[1].cursor_x = 0;
E.layout.panes[1].cursor_y = 0;
E.layout.panes[1].row_offset = 0;
E.layout.panes[1].col_offset = 0;
E.layout.panes[1].is_active = 0;
editorSetStatusMessage("Horizontal split: %d / %d", buffer_id_top, buffer_id_bottom);
return 0;
}
/**
* @brief Returns to single buffer fullscreen
*/
void splitScreenUnify(void) {
E.layout.mode = SPLIT_NONE;
E.layout.num_panes = 1;
E.layout.active_pane = 0;
E.layout.panes[0].start_row = 0;
E.layout.panes[0].start_col = 0;
E.layout.panes[0].height = E.screenrows - 2;
E.layout.panes[0].width = E.screencols;
E.layout.panes[0].is_active = 1;
editorSetStatusMessage("Unified view");
}
/**
* @brief Switches active pane (focus moves between splits)
* @return 0 on success, -1 on failure
*/
int splitScreenSwitchPane(void) {
if (E.layout.num_panes < 2) {
editorSetStatusMessage("No split to switch");
return -1;
}
// Deactivate current pane
E.layout.panes[E.layout.active_pane].is_active = 0;
// Move to next pane
E.layout.active_pane = (E.layout.active_pane + 1) % E.layout.num_panes;
// Activate new pane
E.layout.panes[E.layout.active_pane].is_active = 1;
editorSetStatusMessage("Switched to pane %d (buffer %d)",
E.layout.active_pane,
E.layout.panes[E.layout.active_pane].buffer_id);
return 0;
}
/**
* @brief Updates the active pane's buffer
* @param buffer_id New buffer ID for active pane
* @return 0 on success, -1 on failure
*/
int splitScreenSetPaneBuffer(int buffer_id) {
if (bufferFindById(buffer_id) == NULL) {
editorSetStatusMessage("Error: invalid buffer ID");
return -1;
}
EditorPane *active = &E.layout.panes[E.layout.active_pane];
active->buffer_id = buffer_id;
active->cursor_x = 0;
active->cursor_y = 0;
active->row_offset = 0;
active->col_offset = 0;
editorSetStatusMessage("Pane %d now showing buffer %d",
E.layout.active_pane, buffer_id);
return 0;
}
/**
* @brief Gets current screen layout
* @return Pointer to current ScreenLayout
*/
ScreenLayout *splitScreenGetLayout(void) {
return &E.layout;
}
/**
* @brief Gets active pane
* @return Pointer to active EditorPane
*/
EditorPane *splitScreenGetActivePane(void) {
if (E.layout.num_panes == 0) return NULL;
return &E.layout.panes[E.layout.active_pane];
}