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added line highlighter in view pane

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the view pane was working good and scrolling was fine, but it was impossible to know which line you were on because there was no cursor. this is now added, scrolling with j k ctrl d and ctrl u now works just like in vim (I LOVE VIM) this is just a change for satisfaction for now but will come in handy in the future when i make line by line and hunk staging and commitng. as comitting is onlyy possible file by file right now
This commit is contained in:
marcusDenslow
2025-06-07 14:41:26 +02:00
parent 1824c97f2c
commit c7baafcbd1
4 changed files with 188 additions and 68 deletions
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255
ncurses_diff_viewer.c
View File

@@ -23,6 +23,7 @@ int init_ncurses_diff_viewer(NCursesDiffViewer *viewer) {
memset(viewer, 0, sizeof(NCursesDiffViewer));
viewer->selected_file = 0;
viewer->file_scroll_offset = 0;
viewer->file_cursor_line = 0;
viewer->selected_stash = 0;
viewer->current_mode = NCURSES_MODE_FILE_LIST;
viewer->sync_status = SYNC_STATUS_IDLE;
@@ -198,6 +199,7 @@ int load_full_file_with_diff(NCursesDiffViewer *viewer, const char *filename) {
viewer->file_line_count = 0;
viewer->file_scroll_offset = 0;
viewer->file_cursor_line = 0;
// Check if this is a new file
if (is_ncurses_new_file(filename)) {
@@ -1577,7 +1579,9 @@ void render_file_content_window(NCursesDiffViewer *viewer) {
// Show content if available
if (viewer->file_line_count > 0) {
int max_lines_visible = viewer->terminal_height - 4;
int height, width;
getmaxyx(viewer->file_content_win, height, width);
int max_lines_visible = height - 2;
int content_width = viewer->terminal_width - viewer->file_panel_width - 3;
for (int i = 0; i < max_lines_visible &&
@@ -1588,9 +1592,15 @@ void render_file_content_window(NCursesDiffViewer *viewer) {
NCursesFileLine *line = &viewer->file_lines[line_idx];
int y = i + 1;
int is_cursor_line = (line_idx == viewer->file_cursor_line);
// Apply line highlighting for cursor line
if (is_cursor_line) {
wattron(viewer->file_content_win, A_REVERSE);
}
// Handle commit header coloring
if (line->type == 'h') {
if (line->type == 'h' && viewer->current_mode == NCURSES_MODE_FILE_VIEW) {
// Commit header line with special coloring for hash and branches
char display_line[1024];
if ((int)strlen(line->line) > content_width - 2) {
@@ -1695,8 +1705,26 @@ void render_file_content_window(NCursesDiffViewer *viewer) {
x++;
}
}
} else if (line->type == 'i') {
// Commit info lines (Author, Date) in white with colored labels
} else if (line->type == 'h') {
// In commit/stash view, show header lines as plain white text
char display_line[1024];
if ((int)strlen(line->line) > content_width - 2) {
strncpy(display_line, line->line, content_width - 5);
display_line[content_width - 5] = '\0';
strcat(display_line, "...");
} else {
strcpy(display_line, line->line);
}
mvwprintw(viewer->file_content_win, y, 1, "%s", display_line);
// For cursor line on blank lines, fill with spaces to show highlighting
if (is_cursor_line && strlen(display_line) == 0) {
for (int x = 1; x < content_width; x++) {
mvwaddch(viewer->file_content_win, y, x, ' ');
}
}
} else if (line->type == 'i' && viewer->current_mode == NCURSES_MODE_FILE_VIEW) {
// Commit info lines (Author, Date) in white with colored labels - only in file view
char display_line[1024];
if ((int)strlen(line->line) > content_width - 2) {
strncpy(display_line, line->line, content_width - 5);
@@ -1720,6 +1748,24 @@ void render_file_content_window(NCursesDiffViewer *viewer) {
} else {
mvwprintw(viewer->file_content_win, y, 1, "%s", display_line);
}
} else if (line->type == 'i') {
// In commit/stash view, just show plain white text
char display_line[1024];
if ((int)strlen(line->line) > content_width - 2) {
strncpy(display_line, line->line, content_width - 5);
display_line[content_width - 5] = '\0';
strcat(display_line, "...");
} else {
strcpy(display_line, line->line);
}
mvwprintw(viewer->file_content_win, y, 1, "%s", display_line);
// For cursor line on blank lines, fill with spaces to show highlighting
if (is_cursor_line && strlen(display_line) == 0) {
for (int x = 1; x < content_width; x++) {
mvwaddch(viewer->file_content_win, y, x, ' ');
}
}
} else if (line->type == 's') {
// File statistics line - need to color + and - characters and byte changes
char display_line[1024];
@@ -1807,6 +1853,13 @@ void render_file_content_window(NCursesDiffViewer *viewer) {
}
mvwprintw(viewer->file_content_win, y, 1, "%s", display_line);
// For cursor line on blank lines, fill with spaces to show highlighting
if (is_cursor_line && strlen(display_line) == 0) {
for (int x = 1; x < content_width; x++) {
mvwaddch(viewer->file_content_win, y, x, ' ');
}
}
// Reset color
if (line->type == '+') {
@@ -1817,6 +1870,11 @@ void render_file_content_window(NCursesDiffViewer *viewer) {
wattroff(viewer->file_content_win, COLOR_PAIR(3));
}
}
// Turn off line highlighting if it was applied
if (is_cursor_line) {
wattroff(viewer->file_content_win, A_REVERSE);
}
}
// Show scroll indicator
@@ -2384,38 +2442,66 @@ int handle_ncurses_diff_input(NCursesDiffViewer *viewer, int key) {
case KEY_UP:
case 'k':
// Scroll content up
if (viewer->file_scroll_offset > 0) {
viewer->file_scroll_offset--;
// Move cursor up (vim-style)
if (viewer->file_cursor_line > 0) {
viewer->file_cursor_line--;
// Scroll up if cursor gets within 3 lines of top
if (viewer->file_cursor_line < viewer->file_scroll_offset + 3 && viewer->file_scroll_offset > 0) {
viewer->file_scroll_offset--;
}
}
break;
case KEY_DOWN:
case 'j':
// Scroll content down
if (viewer->file_line_count > max_lines_visible &&
viewer->file_scroll_offset <
viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset++;
// Move cursor down (vim-style)
if (viewer->file_cursor_line < viewer->file_line_count - 1) {
viewer->file_cursor_line++;
// Scroll down if cursor gets within 3 lines of bottom
if (viewer->file_cursor_line >= viewer->file_scroll_offset + max_lines_visible - 3 &&
viewer->file_scroll_offset < viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset++;
}
}
break;
case 21: // Ctrl+U
// Scroll up 30 lines
viewer->file_scroll_offset -= 30;
case KEY_PPAGE: // Page Up
// Scroll content up by page
viewer->file_scroll_offset -= max_lines_visible;
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
break;
case 21: // Ctrl+U
// Move cursor up half page
viewer->file_cursor_line -= max_lines_visible / 2;
if (viewer->file_cursor_line < 0) {
viewer->file_cursor_line = 0;
}
// Adjust scroll to keep cursor visible with padding
if (viewer->file_cursor_line < viewer->file_scroll_offset + 3) {
viewer->file_scroll_offset = viewer->file_cursor_line - 3;
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
}
break;
case 4: // Ctrl+D
// Scroll down 30 lines
if (viewer->file_line_count > max_lines_visible) {
viewer->file_scroll_offset += 30;
if (viewer->file_scroll_offset >
viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset =
viewer->file_line_count - max_lines_visible;
// Move cursor down half page
viewer->file_cursor_line += max_lines_visible / 2;
if (viewer->file_cursor_line >= viewer->file_line_count) {
viewer->file_cursor_line = viewer->file_line_count - 1;
}
// Adjust scroll to keep cursor visible with padding
if (viewer->file_cursor_line >= viewer->file_scroll_offset + max_lines_visible - 3) {
viewer->file_scroll_offset = viewer->file_cursor_line - max_lines_visible + 4;
if (viewer->file_scroll_offset > viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset = viewer->file_line_count - max_lines_visible;
}
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
}
break;
@@ -2432,14 +2518,6 @@ int handle_ncurses_diff_input(NCursesDiffViewer *viewer, int key) {
}
}
break;
case KEY_PPAGE: // Page Up
// Scroll content up by page
viewer->file_scroll_offset -= max_lines_visible;
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
break;
}
} else if (viewer->current_mode == NCURSES_MODE_COMMIT_LIST) {
// Commit list mode navigation
@@ -2630,38 +2708,58 @@ int handle_ncurses_diff_input(NCursesDiffViewer *viewer, int key) {
case KEY_UP:
case 'k':
// Scroll content up
if (viewer->file_scroll_offset > 0) {
viewer->file_scroll_offset--;
// Move cursor up (vim-style)
if (viewer->file_cursor_line > 0) {
viewer->file_cursor_line--;
// Scroll up if cursor gets within 3 lines of top
if (viewer->file_cursor_line < viewer->file_scroll_offset + 3 && viewer->file_scroll_offset > 0) {
viewer->file_scroll_offset--;
}
}
break;
case KEY_DOWN:
case 'j':
// Scroll content down
if (viewer->file_line_count > max_lines_visible &&
viewer->file_scroll_offset <
viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset++;
// Move cursor down (vim-style)
if (viewer->file_cursor_line < viewer->file_line_count - 1) {
viewer->file_cursor_line++;
// Scroll down if cursor gets within 3 lines of bottom
if (viewer->file_cursor_line >= viewer->file_scroll_offset + max_lines_visible - 3 &&
viewer->file_scroll_offset < viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset++;
}
}
break;
case 21: // Ctrl+U
// Scroll up 30 lines
viewer->file_scroll_offset -= 30;
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
// Move cursor up half page
viewer->file_cursor_line -= max_lines_visible / 2;
if (viewer->file_cursor_line < 0) {
viewer->file_cursor_line = 0;
}
// Adjust scroll to keep cursor visible with padding
if (viewer->file_cursor_line < viewer->file_scroll_offset + 3) {
viewer->file_scroll_offset = viewer->file_cursor_line - 3;
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
}
break;
case 4: // Ctrl+D
// Scroll down 30 lines
if (viewer->file_line_count > max_lines_visible) {
viewer->file_scroll_offset += 30;
if (viewer->file_scroll_offset >
viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset =
viewer->file_line_count - max_lines_visible;
// Move cursor down half page
viewer->file_cursor_line += max_lines_visible / 2;
if (viewer->file_cursor_line >= viewer->file_line_count) {
viewer->file_cursor_line = viewer->file_line_count - 1;
}
// Adjust scroll to keep cursor visible with padding
if (viewer->file_cursor_line >= viewer->file_scroll_offset + max_lines_visible - 3) {
viewer->file_scroll_offset = viewer->file_cursor_line - max_lines_visible + 4;
if (viewer->file_scroll_offset > viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset = viewer->file_line_count - max_lines_visible;
}
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
}
break;
@@ -2696,38 +2794,58 @@ int handle_ncurses_diff_input(NCursesDiffViewer *viewer, int key) {
case KEY_UP:
case 'k':
// Scroll content up
if (viewer->file_scroll_offset > 0) {
viewer->file_scroll_offset--;
// Move cursor up (vim-style)
if (viewer->file_cursor_line > 0) {
viewer->file_cursor_line--;
// Scroll up if cursor gets within 3 lines of top
if (viewer->file_cursor_line < viewer->file_scroll_offset + 3 && viewer->file_scroll_offset > 0) {
viewer->file_scroll_offset--;
}
}
break;
case KEY_DOWN:
case 'j':
// Scroll content down
if (viewer->file_line_count > max_lines_visible &&
viewer->file_scroll_offset <
viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset++;
// Move cursor down (vim-style)
if (viewer->file_cursor_line < viewer->file_line_count - 1) {
viewer->file_cursor_line++;
// Scroll down if cursor gets within 3 lines of bottom
if (viewer->file_cursor_line >= viewer->file_scroll_offset + max_lines_visible - 3 &&
viewer->file_scroll_offset < viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset++;
}
}
break;
case 21: // Ctrl+U
// Scroll up 30 lines
viewer->file_scroll_offset -= 30;
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
// Move cursor up half page
viewer->file_cursor_line -= max_lines_visible / 2;
if (viewer->file_cursor_line < 0) {
viewer->file_cursor_line = 0;
}
// Adjust scroll to keep cursor visible with padding
if (viewer->file_cursor_line < viewer->file_scroll_offset + 3) {
viewer->file_scroll_offset = viewer->file_cursor_line - 3;
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
}
break;
case 4: // Ctrl+D
// Scroll down 30 lines
if (viewer->file_line_count > max_lines_visible) {
viewer->file_scroll_offset += 30;
if (viewer->file_scroll_offset >
viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset =
viewer->file_line_count - max_lines_visible;
// Move cursor down half page
viewer->file_cursor_line += max_lines_visible / 2;
if (viewer->file_cursor_line >= viewer->file_line_count) {
viewer->file_cursor_line = viewer->file_line_count - 1;
}
// Adjust scroll to keep cursor visible with padding
if (viewer->file_cursor_line >= viewer->file_scroll_offset + max_lines_visible - 3) {
viewer->file_scroll_offset = viewer->file_cursor_line - max_lines_visible + 4;
if (viewer->file_scroll_offset > viewer->file_line_count - max_lines_visible) {
viewer->file_scroll_offset = viewer->file_line_count - max_lines_visible;
}
if (viewer->file_scroll_offset < 0) {
viewer->file_scroll_offset = 0;
}
}
break;
@@ -3167,6 +3285,7 @@ int parse_content_lines(NCursesDiffViewer *viewer, const char *content) {
viewer->file_line_count = 0;
viewer->file_scroll_offset = 0;
viewer->file_cursor_line = 0;
// Parse line by line, preserving empty lines
const char *line_start = content;

1
ncurses_diff_viewer.h
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@@ -78,6 +78,7 @@ typedef struct {
NCursesFileLine file_lines[MAX_FULL_FILE_LINES];
int file_line_count;
int file_scroll_offset;
int file_cursor_line;
NCursesCommit commits[MAX_COMMITS];
int commit_count;
int selected_commit;

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ncurses_diff_viewer.o
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