4coder » Forums » Repeat last search
nephewtom
8 posts
#21302 Repeat last search
4 weeks ago Edited by nephewtom on July 21, 2019, 10:52 a.m. Reason: Initial post

Hi.
Is it possible to repeat last search?
Let's say I hit ctrl f and type a string, for example Interactive.
Then quit and do some other stuff.

Is there a way to hit some key and repeat the same search for Interactive?
Or may be hit ctrl f and other key, and repeat the search for it.

Best Regards.
mrmixer
Simon Anciaux
651 posts
#21308 Repeat last search
3 weeks, 6 days ago Edited by Simon Anciaux on July 23, 2019, 8:25 p.m. Reason: Correction

EDIT: actually there is a way: start a search and pres CTRL + Return or CTRL + Tab to search the last term.

By default you can't do that. It possible to implement yourself in the custom layer if you have the paid version.
nephewtom
8 posts
#21309 Repeat last search
3 weeks, 6 days ago

I have it. Any hints?
Recently got 4coder and just have changed some key bindings to match Emacs (C-n, C-p, C-a, C-e, C-k ...)

Regards.
mrmixer
Simon Anciaux
651 posts
#21310 Repeat last search
3 weeks, 5 days ago Edited by Simon Anciaux on July 23, 2019, 1:33 p.m. Reason: wording

The search functions are implemented in 4coder_base_commands.cpp. The "search", "reverse_search", "search_identifier", "reverse_search_identifier" functions call "isearch" and "isearch__update_highlight" to do the actual search. So you could copy the search_xx and reverse_search_xx function and modify them to search for the last search term.

Here are my search functions. I don't guarantee that they will work or that they have the same behavior as 4coder or other editor. It's intended to be somewhat similar to VIM search. It uses global variables, I never took the time to use the managed scopes to re-implement them.

The history part is a "module" that I re-use in other places of my custom layer.
You need to bind:
- "search_query" to start a search by typing a search term and go to the first instance forward;
- "search_query_identifier" to start a search with the word under the cursor and go to the first instance forward;
- "search_next" to go to the next instance of the search term;
- "search_previous" to go to the previous instance of the search term;
- "search_return_to_start" to go back to where you started the search;
- "search_clear" to clear the search term and remove the highlight in the file (if you use the second code sample);

When the end of the file is reached, the search will continue from the top of the file.
When you use search_query you can use UP and DOWN arrow to find previous term you searched (it may behave weird).
If you switch buffer you can use search_next and search_previous to search the term in the new buffer.
search_return_to_start will only go back in the last buffer you searched.

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// MARK history

typedef struct History {
    
    char* buffer;
    int bufferSize;
    int maxEntryCount;
    int entryMaxLength;
    int lastWrittenEntry;
    int lastReadEntry;
    int entryCount;
} History;

History history_init( void* buffer, int bufferSize, int entryMaxLength ) {
    
    History h = { };
    
    h.buffer = ( char* ) buffer;
    h.bufferSize = bufferSize;
    h.entryMaxLength = entryMaxLength;
    h.maxEntryCount = bufferSize / entryMaxLength;
    h.lastWrittenEntry = -1;
    h.lastReadEntry = -1;
    h.entryCount = 0;
    
    return h;
}

int history_push( History* history, char* string, int length, int entry = -1 ) {
    
    if ( entry >= 0 && entry < history->entryCount ) {
        
        history->lastWrittenEntry = entry;
        
    } else {
        
        if ( history->entryCount < history->maxEntryCount - 1 ) {
            history->entryCount++;
        }
        
        if ( history->lastWrittenEntry < history->entryCount - 1 ) {
            history->lastWrittenEntry++;
        } else {
            history->lastWrittenEntry = 0;
        }
    }
    
    char* destination = history->buffer + ( history->entryMaxLength * history->lastWrittenEntry );
    length = ( length > history->entryMaxLength - 1 ) ? history->entryMaxLength - 1 : length;
    
    for ( int c = 0; c < length; c++ ) {
        *destination++ = *string++;
    }
    
    *destination = '\0';
    
    history->lastReadEntry = history->lastWrittenEntry;
    
    return history->lastWrittenEntry;
}

void history_pop( History* history ) {
    
    if ( history->entryCount > 0 ) {
        
        for ( int i = history->lastWrittenEntry; i < history->entryCount - 1; i++ ) {
            
            char* destination = history->buffer + ( history->entryMaxLength * i );
            char* source = destination + history->entryMaxLength;
            
            while ( *source != '\0' ) {
                *destination++ = *source++;
            }
            
            ( *destination ) = '\0';
        }
        
        history->entryCount--;
        history->lastWrittenEntry--;
        
        if ( history->lastWrittenEntry < 0 ) {
            history->lastWrittenEntry = history->entryCount - 1;
        }
    }
}

int history_getLast( History* history, char* string, int* length ) {
    
    *length = 0;
    
    if ( history->entryCount > 0 ) {
        
        history->lastReadEntry = history->lastWrittenEntry;
        char* source = history->buffer + ( history->entryMaxLength * history->lastReadEntry );
        
        while ( *source != '\0' ) {
            *string++ = *source++;
            ( *length )++;
        }
    }
    
    return history->lastReadEntry;
}

int history_getOlder( History* history, char* string, int* length ) {
    
    *length = 0;
    
    if ( history->entryCount > 0 ) {
        
        history->lastReadEntry--;
        
        if ( history->lastReadEntry < 0 ) {
            history->lastReadEntry = history->entryCount - 1;
        }
        
        char* source = history->buffer + ( history->entryMaxLength * history->lastReadEntry );
        
        while ( *source != '\0' ) {
            *string++ = *source++;
            ( *length )++;
        }
    }
    
    return history->lastReadEntry;
}

int history_getNewer( History* history, char* string, int* length ) {
    
    *length = 0;
    
    if ( history->entryCount > 0 ) {
        
        history->lastReadEntry++;
        
        if ( history->lastReadEntry >= history->entryCount ) {
            history->lastReadEntry = 0;
        }
        
        char* source = history->buffer + ( history->entryMaxLength * history->lastReadEntry );
        
        while ( *source != '\0' ) {
            *string++ = *source++;
            ( *length )++;
        }
    }
    
    return history->lastReadEntry;
}

// MARK search

#define MAX_SEARCH_LENGTH 256
static char searchBuffer[ 10 ][ MAX_SEARCH_LENGTH ] = { };
History searchHistory = history_init( searchBuffer, sizeof( searchBuffer ), MAX_SEARCH_LENGTH );

int32_t search_buffer_id = 0;
int32_t search_start_position = 0;
int32_t search_last_position = 0;
char search_query_space[ MAX_SEARCH_LENGTH ];
int32_t search_query_size;

static void search_query_( Application_Links* app, String query ) {
    
    View_Summary view = get_active_view( app, AccessProtected );
    Buffer_Summary buffer = get_buffer( app, view.buffer_id, AccessProtected );
    
    if ( buffer.exists ) {
        
        search_buffer_id = buffer.buffer_id;
        Query_Bar bar = { 0 };
        
        if ( start_query_bar( app, &bar, 0 ) != 0 ) {
            
            int32_t start_pos = view.cursor.pos;
            search_start_position = start_pos;
            Range match = make_range( start_pos, start_pos );
            
            if ( query.size > 0 ) {
                match.max += query.size;
            }
            
            bar.string = make_fixed_width_string( search_query_space );
            copy_ss( &bar.string, query );
            bar.prompt = make_lit_string( "Search: " );
            int32_t entry = -1;
            
            Managed_Scope view_scope = view_get_managed_scope( app, view.view_id );
            Managed_Object highlight = alloc_buffer_markers_on_buffer( app, buffer.buffer_id, 2, &view_scope );
            Marker_Visual visual = create_marker_visual( app, highlight );
            marker_visual_set_effect( app, visual,
                                     VisualType_CharacterHighlightRanges,
                                     SymbolicColorFromPalette( Stag_Highlight ),
                                     SymbolicColorFromPalette( Stag_At_Highlight ), 0 );
            marker_visual_set_view_key( app, visual, view.view_id );
            isearch__update_highlight( app, &view, highlight, match.start, match.end );
            
            User_Input in = { 0 };
            
            for ( ; ; ) {
                
                b32 suppress_highligh_update = false;
                
                if ( match.min != match.max ) {
                    center_view( app );
                }
                
                in = get_user_input( app, EventOnAnyKey, EventOnEsc );
                
                if ( in.abort ) {
                    break;
                }
                
                uint8_t character[ 4 ];
                uint32_t length = to_writable_character( in, character );
                
                if ( in.key.keycode == '\n' ) {
                    
                    break;
                    
                } else if ( length != 0 && key_is_unmodified( &in.key ) ) {
                    
                    append_ss( &bar.string, make_string( character, length ) );
                    
                } else if ( in.key.keycode == key_back ) {
                    
                    backspace_utf8( &bar.string );
                    
                } else if ( in.key.keycode == key_up ) {
                    
                    int32_t savedEntry = entry;
                    entry = history_getOlder( &searchHistory, bar.string.str, &bar.string.size );
                    
                    if ( savedEntry == entry ) {
                        entry = -1;
                        bar.string.size = 0;
                    }
                    
                } else if ( in.key.keycode == key_down ) {
                    
                    int32_t savedEntry = entry;
                    entry = history_getNewer( &searchHistory, bar.string.str, &bar.string.size );
                    
                    if ( savedEntry == entry ) {
                        entry = -1;
                        bar.string.size = 0;
                    }
                }
                
                search_query_size = bar.string.size;
                
                if ( in.command.command == mouse_wheel_scroll ) {
                    mouse_wheel_scroll( app );
                    suppress_highligh_update = true;
                }
                
                int32_t new_pos = 0;
                buffer_seek_string_insensitive_forward( app, &buffer, start_pos, 0, bar.string.str, bar.string.size, &new_pos );
                
                if ( new_pos >= buffer.size ) {
                    buffer_seek_string_insensitive_backward( app, &buffer, start_pos, 0, bar.string.str, bar.string.size, &new_pos );
                }
                
                if ( new_pos < buffer.size && new_pos >= 0 ) {
                    match.min = new_pos;
                    match.max = match.min + bar.string.size;
                }
                
                if ( !suppress_highligh_update ){
                    isearch__update_highlight( app, &view, highlight, match.start, match.end );
                }
            }
            
            managed_object_free( app, highlight );
            
            if ( in.abort ) {
                
                view_set_cursor( app, &view, seek_pos( search_start_position ), true );
                center_view( app );
                
            } else {
                
                if ( match.max - match.min > 0 ) {
                    view_set_cursor( app, &view, seek_pos( match.min ), true );
                    search_query_size = bar.string.size;
                    search_last_position = match.min;
                    history_push( &searchHistory, bar.string.str, bar.string.size, -1 );
                }
            }
        }
    }
}

CUSTOM_COMMAND_SIG( search_next ) {
    
    uint32_t access = AccessProtected;
    
    View_Summary view = get_active_view( app, access );
    Buffer_Summary buffer = get_buffer( app, view.buffer_id, access );
    
    if ( buffer.exists ) {
        
        if ( search_buffer_id != buffer.buffer_id ) {
            search_start_position = search_last_position = view.cursor.pos;
            search_buffer_id = buffer.buffer_id;
        }
        
        if ( search_query_size > 0 ) {
            
            int32_t new_pos = 0;
            buffer_seek_string_insensitive_forward( app, &buffer, search_last_position + 1, 0, search_query_space, search_query_size, &new_pos );
            
            if ( new_pos >= buffer.size && search_last_position != 0 ) {
                buffer_seek_string_insensitive_forward( app, &buffer, 0, 0, search_query_space, search_query_size, &new_pos );
            }
            
            if ( new_pos < buffer.size ) {
                
                Range match = { 0 };
                match.min = new_pos;
                match.max = match.min + search_query_size;
                search_last_position = match.min;
                
                view_set_cursor( app, &view, seek_pos( match.min ), true );
                center_view( app );
            }
        }
    }
}

CUSTOM_COMMAND_SIG( search_previous ) {
    
    uint32_t access = AccessProtected;
    
    View_Summary view = get_active_view( app, access );
    Buffer_Summary buffer = get_buffer( app, view.buffer_id, access );
    
    if ( buffer.exists ) {
        
        if ( search_buffer_id != buffer.buffer_id ) {
            search_start_position = search_last_position = view.cursor.pos;
            search_buffer_id = buffer.buffer_id;
        }
        
        if ( search_query_size > 0 ) {
            
            int32_t new_pos = 0;
            buffer_seek_string_insensitive_backward( app, &buffer, search_last_position - 1, 0, search_query_space, search_query_size, &new_pos );
            
            if ( new_pos < 0 && search_last_position != buffer.size ) {
                buffer_seek_string_insensitive_backward( app, &buffer, buffer.size - 1, 0, search_query_space, search_query_size, &new_pos );
            }
            
            if ( new_pos >= 0 ) {
                
                Range match = { 0 };
                match.min = new_pos;
                match.max = match.min + search_query_size;
                search_last_position = match.min;
                
                view_set_cursor( app, &view, seek_pos( match.min ), true );
                center_view( app );
            }
        }
    }
}

CUSTOM_COMMAND_SIG( search_query ) {
    String query = { 0 };
    search_query_( app, query );
}

CUSTOM_COMMAND_SIG( search_query_identifier ) {
    
    View_Summary view = get_active_view( app, AccessProtected );
    Buffer_Summary buffer = get_buffer( app, view.buffer_id, AccessProtected );
    
    if ( buffer.exists ) {
        
        Range range = { 0 };
        String query = read_identifier_at_pos( app, &buffer, view.cursor.pos, search_query_space, MAX_SEARCH_LENGTH, &range );
        view_set_cursor( app, &view, seek_pos( range.min ), true );
        
        search_buffer_id = buffer.buffer_id;
        search_start_position = range.min;
        search_last_position = range.min;
        search_query_size = query.size;
        history_push( &searchHistory, query.str, query.size, -1 );
        search_next( app );
    }
}

CUSTOM_COMMAND_SIG( search_return_to_start ) {
    
    View_Summary view = get_active_view( app, AccessProtected );
    Buffer_Summary buffer = get_buffer( app, view.buffer_id, AccessProtected );
    
    if ( buffer.exists && search_buffer_id == buffer.buffer_id ) {
        view_set_cursor( app, &view, seek_pos( search_start_position ), true );
        center_view( app );
    }
}

CUSTOM_COMMAND_SIG( search_clear ) {
    search_query_size = 0;
}


And if you want search highlight you need to copy the following code at the end of the render_caller (create a copy of default_render_caller from 4coder_default_hooks.cpp), just before "do_core_render(app);".

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// NOTE simon: highlight search
    if ( search_query_size ) {
        
        Theme_Color color;
        color.tag = Stag_Text_Cycle_3;
        get_theme_colors(app, &color, 1);
        
        Temp_Memory temp = begin_temp_memory(scratch);
        int32_t text_size = on_screen_range.one_past_last - on_screen_range.first;
        char *text = push_array(scratch, char, text_size);
        buffer_read_range(app, &buffer, on_screen_range.first, on_screen_range.one_past_last, text);
        
        Highlight_Record *records = push_array(scratch, Highlight_Record, 0);
        String tail = make_string(text, text_size);
        for (int32_t i = 0; i < text_size; tail.str += 1, tail.size -= 1, i += 1){
            if (match_part_insensitive(tail, make_string( search_query_space, search_query_size ))){
                Highlight_Record *record = push_array(scratch, Highlight_Record, 1);
                record->first = i + on_screen_range.first;
                record->one_past_last = record->first + search_query_size;
                record->color = color.color;
                tail.str += search_query_size - 1;
                tail.size -= search_query_size - 1;
                i += search_query_size - 1;
            }
        }
        int32_t record_count = (int32_t)(push_array(scratch, Highlight_Record, 0) - records);
        push_array(scratch, Highlight_Record, 1);
        
        if (record_count > 0){
            sort_highlight_record(records, 0, record_count);
            Temp_Memory marker_temp = begin_temp_memory(scratch);
            Marker *markers = push_array(scratch, Marker, 0);
            int_color current_color = records[0].color;
            {
                Marker *marker = push_array(scratch, Marker, 2);
                marker[0].pos = records[0].first;
                marker[1].pos = records[0].one_past_last;
            }
            for (int32_t i = 1; i <= record_count; i += 1){
                bool32 do_emit = i == record_count || (records[i].color != current_color);
                if (do_emit){
                    int32_t marker_count = (int32_t)(push_array(scratch, Marker, 0) - markers);
                    Managed_Object o = alloc_buffer_markers_on_buffer(app, buffer.buffer_id, marker_count, &render_scope);
                    managed_object_store_data(app, o, 0, marker_count, markers);
                    Marker_Visual v = create_marker_visual(app, o);
                    marker_visual_set_effect(app, v,
                                             VisualType_CharacterHighlightRanges,
                                             SymbolicColor_Transparent, current_color, 0);
                    marker_visual_set_priority(app, v, VisualPriority_Lowest);
                    end_temp_memory(marker_temp);
                    current_color = records[i].color;
                }
                
                Marker *marker = push_array(scratch, Marker, 2);
                marker[0].pos = records[i].first;
                marker[1].pos = records[i].one_past_last;
            }
        }
        
        end_temp_memory(temp);
    }
immortalx
John
20 posts
#21311 Repeat last search
3 weeks, 5 days ago

@nephewtom, Simon(mrmixer) knows 4coder inside-out, so his answer is the best one could ask!

I've made my own naive but simple modification to the isearch function in 4coder_base_commands.cpp, which seems to work but I don't know its implications. I replaced the line:
1
copy(&bar.string, query_init);

with
1
copy(&bar.string, previous_isearch_query);


And speaking of modifications to 4coder's search, I'd love to know if someone has managed to allow pasting from clipboard to the search prompt.
mrmixer
Simon Anciaux
651 posts
#21317 Repeat last search
3 weeks, 5 days ago

I just look at the recent version of the code and there is a way by default to search for the last term.

Just start a search and press CTRL + Return or CTRL + TAB.

Sorry for saying it wasn't possible.
nephewtom
8 posts
#21332 Repeat last search
3 weeks, 2 days ago

mrmixer
I just look at the recent version of the code and there is a way by default to search for the last term.

Just start a search and press CTRL + Return or CTRL + TAB.

Sorry for saying it wasn't possible.


Yes, that made it.
Anyway, thanks for the explanations about the code.

Regards.