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Diffstat (limited to 'src/filter_observer.hh')
-rw-r--r-- | src/filter_observer.hh | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/filter_observer.hh b/src/filter_observer.hh new file mode 100644 index 0000000..1e1c302 --- /dev/null +++ b/src/filter_observer.hh @@ -0,0 +1,78 @@ +/** + * Copyright (c) 2015, Timothy Stack + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * * Neither the name of Timothy Stack nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef filter_observer_hh +#define filter_observer_hh + +#include <sys/types.h> + +#include "logfile.hh" +#include "textview_curses.hh" + +class line_filter_observer : public logline_observer { +public: + line_filter_observer(filter_stack& fs, std::shared_ptr<logfile> lf) + : lfo_filter_stack(fs), lfo_filter_state(lf) + { + } + + void logline_restart(const logfile& lf, file_size_t rollback_size) override + { + for (auto& filter : this->lfo_filter_stack) { + filter->revert_to_last(this->lfo_filter_state, rollback_size); + } + } + + void logline_new_lines(const logfile& lf, + logfile::const_iterator ll_begin, + logfile::const_iterator ll_end, + const shared_buffer_ref& sbr) override; + + void logline_eof(const logfile& lf) override; + + bool excluded(uint32_t filter_in_mask, + uint32_t filter_out_mask, + size_t offset) const + { + bool filtered_in = (filter_in_mask == 0) + || (this->lfo_filter_state.tfs_mask[offset] & filter_in_mask) != 0; + bool filtered_out + = (this->lfo_filter_state.tfs_mask[offset] & filter_out_mask) != 0; + return !filtered_in || filtered_out; + } + + size_t get_min_count(size_t max) const; + + void clear_deleted_filter_state(); + + filter_stack& lfo_filter_stack; + logfile_filter_state lfo_filter_state; +}; + +#endif |